INDEX
7MPa Work clamping system
CTU CTT
CLU CLTCNA CMC CMDCSU CST CSN CSY CSKCEK CEA CVH
VCB VCP VHD VRG VEF WPB WPCHCD HCS HCT X63 WRA WRB

Refer to separate catalog for details.

Expansion clamp
CGC
CGT
CGU
CGE
CGY

7MPa Sensing clamp
CTM
CTN
CLM
CLN
CNB
Refer to separate catalog for details.

Pal system
CPC
CPH
CPY
CPK
WVP
Refer to separate catalog for details.

air Work clamping system
CTX
CTY
CLX
CLY
CSS
CSX

Refer to separate catalog for details.

35MPa Work clamping system
CTK CTW CTV
CLW CLVCSW CSVWVP
VCB VCP VHD VRG VEF WPCHCD HCS HCT X63

Refer to separate catalog for details.

INDEX

Expansion
clamp

Expansion clamp

CGC

7MPa
Double acting
Page → 14

Expansion clamp

CGTLong neck

7MPa
Double acting
Page → 40

Expansion clamp

CGU
Eccentric

7MPa
Double acting
Page → 66

Air expansion clamp

CGE

ａｉｒ
Double acting
Page → 90

Air expansion clamp

CGY
Long neckａｉｒDouble acting
Page → 114

1

2

CG□ - □□□□

Expansion clamp

Expansion clamp

CG□

Expansion clamp
7 MPa & air

model

model

CGY

CGE

model

model

CGT

model

CGC

CGU

To download CAD data / To get updated information, visit www.pascaleng.co.jp

3

CG□

Expansion clampCG□ - □□□□

Expansion clamp

model CGC

model CGT

model CGU

Page →14

Page →40

Page →66

Expansion clamp

7MPa

Double acting 7MPa

Double acting 7MPa

Double actingStandard modelLong neck model

Eccentric model

Page →15

Page →41

Page →67

Page →16

Page →42

Page →68

Features

Page →18

Page →44

Page →70

Air sensor valvefunction and structure

Page →20

Page →46

Page →72

Advantage of
non-constant air blow model

Page →24

Page →48

Page →74

Page →26

Page →50

Page →76Page →34

Page →58

Page →82

System configuration example

Page →35

Page →59

Page →83

Hydraulic and pneumatic
circuit diagram

Page →36

Page →60

Page →84

Operation cycle

Page →38

Page →63

Page →87

Caution in use

Page →39

Page →64

Page →88

Model

Specifications
Clamping force & hydraulic pressure
Structure
Explanation of operation

Dimensions
Mounting details
Gripper set
Grip inner diameter & rod height

Refer to page →6 for the details of the expansion clamps that are not described in the catalog.

4Expansion clamp

model CGE

model CGY

Page →90

Page →114

Expansion clampCG□ - □□□□

CG□

air
Expansion clamp

1MPa

Double acting

1MPa

Double actingStandard modelLong neck model

Page →91

Page →115

Page →92

Page →116

Features

Page →94

Page →118

Air sensor valvefunction and structure

Page →96

Page →120

Advantage of
non-constant air blow model

Page →100

Page →122

Page →102

Page →124

Page →108

Page →132

System configuration example

Page →109

Page →133

Pneumatic circuit diagram

Page →110

Page →134

Operation cycle

Page →112

Page →137

Caution in use

Page →113

Page →138

Model

Specifications
Clamping force & air pressure
Structure
Explanation of operation

Dimensions
Mounting details
Gripper set
Grip inner diameter & rod height

Refer to page →6 for the details of the expansion clamps that are not described in the catalog.

To download CAD data / To get updated information, visit www.pascaleng.co.jp

5CG□ - □□□□CG□

Expansion clamp

Expansion clamp

model

model

model

CGS-N2CGT-R

CGS-N17MPa Double acting

7MPa Double acting

7MPa Single acting

Seating surface is set apart from clamp
Seating-less model

Hydraulic : Clamp
Spring: Unclamp

Seating surface

Low height modelContact Pascal for more details.

6CG□ - □□□□CG□

Expansion clamp

Expansion clamp

model

model

CGX

CGY-F3

air Double acting

air Spring acting

Low height model

Spring : Clamp
Air: Unclamp

Contact Pascal for more details.

To download CAD data / To get updated information, visit www.pascaleng.co.jp

7Expansion clampCG□ - □□□□

Expansion clamp

Pascal compact jig system

CG□

Cylinder Block & Head, Transmission case
Pascal expansion clamps are used in variety of

Expansion clamp

Work lift cylinder

Positioning pin

Work lift cylinder

Expansion clamp

Workpiece

Pal ﬁx8

Jig pallet

Pal coupler

Expansion clamp
Expansion clampCG□ - □□□□

with the Expansion clampCG□& housing, Valve body, knuckle, carrier, and ABS…
automobile parts machining processes all over the world.

Expansion clamp

Lifter guide

Coolant nozzle

Jig pallet size : 330×160×45 mm

Expansion clamp

To download CAD data / To get updated information, visit www.pascaleng.co.jp

9CG□ - □□□□
Expansion clamp

Expansion clamp

CG□

Expansion clamp model CGC

Workpiece

Clamping hole
Taper rod

Tapered surface

Seating surface

Gripper

SleeveClamping
hydraulic pressure

Unclamping
hydraulic pressure

The holding force of expansion clamp is transmitted to a gripper by the tapered surface.
As the taper rod lowers, the gripper expands horizontally first along the tapered surface togrip the inner face of clamping hole then pulls a workpiece down to the seating surface.

Unclamping

Clamping

Taper rod
Tapered surface
Gripper

10

Seating surface

CG□ - □□□□

Expansion clamp

Expansion clamp

Compact jig system
The development of the expansion clamp has allowed compact and reliable jigs to be realized.
The compact jig enables the size of machine and workpiece loading system to be minimizedCG□and compresses the machining line.
This can significantly help save on the investment for facilities.

Superior tool accessibility

Short tool

Dramatically improved flatness & roughness

Non-distorted clamping at bottom of workpiece

Tilted ﬂange reduces
accumulation of chips

Short lift stroke

Adequate space prevents
clogging of metal chips

Compact & simple jig

Bore depth
20 mm (CGC-N22)

Thinner jig plate

Expansion clamp model CGC

The same size as jig pallet and workpiece
Expansion clamp

Compact Jig

Jig pallet

Downsizing

Downsizing
Workpiece

Swing clamp

Jig pallet

Conventional Jig

Workpiece

To download CAD data / To get updated information, visit www.pascaleng.co.jp

11CG□ - □□□□
Expansion clamp

Expansion clamp

Features of expansion clampCG□

Non-distorted clamping at bottom of workpiece
The expansion clamp grasps the bottom of the workpiece without any deformation and has a superior
gripping force that allows improved machining accuracy and efficiency.

Clamping at the bottom of the workpieceby the expansion clamp

No deformation

Clamping at the top surface of the workpieceby the conventional swing or link clamp

Easy to deform

Swing clamp

Expansion clamp

Superior tool accessibility

Any interferences between the tool and a clamp body or an arm are eliminated by using the expansion
clamp, which enables machining from all directions and results in a highly efficient machining process.
No interference

Inclined hole drilling

Complex arm design to clear
the cutter path

Swing clamp

Expansion clamp

The shortest tool selectable
Long tool isnecessary12CG□ - □□□□

Expansion clamp

Expansion clamp

Features of expansion clamp

CG□

Eliminate the troubles caused by metal chip
The expansion clamp can eliminate the troubles caused by metal chip deposits or debris contamination
by clamping at the bottom of the workpiece.

Swing clamp

Expansion clamp

Metal chip deposit

High-speed workpiece transport

Low profile gripper design allows lift stroke of workpiece loading system to be shortened, thereby enablinghigh-speed transport and system operation.

Big stroke diﬀerence

Swing clamp

Lift stroke

Lift stroke

Expansion clamp

To download CAD data / To get updated information, visit www.pascaleng.co.jp13CGC- N2□ E□

Expansion clamp

Expansion clamp

Expansion clamp
Double acting 7 MPa

CGC

CGC

model

model

14

CGC

7MPa

DoubleactingCGC- N2□ E□

Expansion clamp

Doubleacting

7MPa

Specifications
Grip inner diameter

1

2

CGC ー N2

E

：Number of grippers

070

073

076

085

09

10

：2 Grippers

11

12

13

：3 Grippers

12

13

14

3

079

082 ：2 Grippers

15

16

Expansion clamp

Size：3 Grippers

CGC-N21E 1

Size
Model
Grip inner diameter

070

073

076

CGC-N22E

079

082

085

09

10

11

12

13

12

kN 1.92 2

2.24

3.04

kN 6.7 2

7.8

9.5 2

Taper rod stroke

mm

4.8

Clamp stroke

mm

1.2

Clamp
UnclampAllowable eccentricity

3

Recommended air blowpressure
Recommended sensor airpressure

13

14

2

3.54

7.50

11.1

23.4

cm

3

1.7

2.7

5.8

cm

3

2.3

3.5

7.2

mm

±0.5

MPa

0.3

MPa

0.2

kg

0.38

0.50

0.83

Recommended tightening N･mtorque of mounting screws 4

3.5

7

12

Mass

15

16

3 Grippers

Clamping force(hydraulic pressure 7MPa)
Radial expansion force(hydraulic pressure 7MPa)

Cylindercapacity

CGC-N23E

2 Grippers

Number of grippers

CGC

indicates made to order.

Workpiece material

Aluminum, steel and others (HRC30 or below) Cast iron also usable depending on conditions

Allowable min.
mm
grip inner diameter
Allowable max.
mm
grip inner diameter
Grip inner diameter tapering
angle (Draft angle)

6.7

7.0

7.3

7.6

7.9

8.2

8.7

7.4

7.7

8.0

8.3

8.6

9.2

9.7 10.7 11.7 12.7 13.7 12.7 13.7 14.7 15.7 16.7

9.7 10.7 11.7 12.7 11.7 12.7 13.7 14.7 15.7

3°or below
0.1 or below

Grip inner diameter circularity● Pressure range：1.5‒7 MPa (CGC-N21E070, CGC-N22E085：1.5‒6 MPa）
● Operating temperature：0‒70 ℃● Proof pressure：10.5 MPa（CGC-N21E070, CGC-N22E085：9 MPa）

● Fluid used：General mineral based hydraulic oil (ISO-VG32 equivalent)● Please inquire if above terms are not applied.
1：CGC-N21E070, 073, 076, 079, 082 are not built-in unclamping sensor valve.

2：Capacity values for hydraulic pressure of 6 MPa are shown.

3：By the eccentric mechanism, the expansion clamp does not have a workpiece positioning function.

4：ISO R898 class 12.9

Clamping force & hydraulic pressure
8

Hydraulic pressure

Clamping force (kN)MPa

CGC-N23E

7

CGC-N21E Clamping force

6

F=0.320×P

1.5

2

3

4

5

6

7

kN 0.48 0.64 0.96 1.28 1.60 1.92 2.24

5

CGC-N22E Clamping force

4

F=0.506×P

CGC-N22E

kN 0.76 1.01 1.52 2.02 2.53 3.04 3.54

3

CGC-N23E Clamping force

2
1
0
1.5

F=1.072×P

CGC-N21E

2

3

4

5

Hydraulic pressure (MPa)67kN 1.61 2.14 3.22 4.29 5.36 6.43 7.50

P：Hydraulic pressure (MPa)● CGC-N21E070, CGC-N22E085 applicable hydraulic pressure shouldbe 1.5 to 6 MPa.

To download CAD data / To get updated information, visit www.pascaleng.co.jp15CGC- N2□ E□

model

CGC-N21E

Expansion clamp

model

7MPa

CGC-N22E

model

Doubleacting

CGC-N23E

2 Grippers

3 Grippers

3 Grippers

ø7.0 7.3 7.6 7.9 8.2

ø8.5 9 10

ø11 12 13

ø12 13 14 15 16

CGC

Expansion clamp

2 Grippers

Sensor nozzle：Exh.
(Workpiece seating detection)❸❶ Piston Ⓐ❻

Unclamping sensor valve ❹❷ Incomplete clamping
sensor valve❻❺
Sensor air：IN

Air blow：IN
Unclamping detection ：Exh.
Incomplete clamping detection：Exh.

Workpiece seating detection
Unclamping detection
Incomplete clamping detectionⓐ❶ Gripper support mechanism (PAT.)The gripping force can be maintained by the hydraulic power (Cylinderⓐ) so that the gripper can firmly catch the workpiece without slipping.
When unclamping, the hydraulic power (Cylinder ⓑ) support thegripper.

❷ Incomplete clamping sensor valve (PAT.)
Incomplete clamping can be detected by an air sensor and the clamped
condition can positively be confirmed. Refer to page →21.

❸ Most effective scraping structure to prevent theclamp from metal chips (PAT.)No chips can intrude because the scraper fits around the gripper andthe rod without space. Refer to pages →24, 25.
Model CGC does not need air-blow during cutting process and it
prevents work environment from air contamination by air-blow mist
also lessens air consumption.
The durability of scraper has been improved because it deforms
radially and evenly along with the stroke of the gripper.

16ⓑ❹ Unclamping sensor valve (JP PAT.)The valve enables positive unclamping detection by movement ofpiston when model CGC is in unclamping action. Refer to page →22.

❺ Using one circuit for air blow and sensor exhaust (JP PAT.)
Sharing exhaust circuit of the unclamping sensor valve and theincomplete clamping sensor valve with an air blow circuit allows to
reduce the number of the circuits and thereby enables the circuitdesign to be easy.

❻ Stroke end detection by a piston Ⓐ (JP PAT.)The gripper does not impair the scraper because it expands horizontallyfirst then strokes down for clamping.
No tolerance is required on depth of the bore when machining it
because the piston ends its stroke by an internal part, not at thebottom of the bore.

CGC- N2□ E□

Expansion clamp

7MPa

DoubleactingWorkpiece setting① Taper rod and gripper are raised by pistons Ⓐ, Ⓑ and sleeve. The gripper is drawn inward within the taper
rod diameter.
Expansion clamp② Set the workpiece onto the seating surface.

Taper rod

Workpiece

CGC

Gripper

Seating surface

SleevePiston Ⓐ

Piston Ⓑ

Clamping
hydraulic pressure

Unclamping
hydraulic pressure

Workpiece holding① Piston Ⓑ and taper rod lower with piston Ⓐ being held at upper stroke end position by clamping hydraulicpressure.
② The gripper expands horizontally along the tapered surface to grip inner face of clamping hole holding
its position at upper stroke end by piston Ⓐ and sleeve.
③ The gripper securely grips the inner face of clamping hole and pulls the workpiece down firmly onto theseating surface.
Clamping hole

Tapered surface

Workpiece

Taper rod

Gripper

Seating surface

SleevePiston Ⓐ

Piston Ⓑ

Clamping
hydraulic pressure

Unclamping
hydraulic pressure

To download CAD data / To get updated information, visit www.pascaleng.co.jp17CGC- N2□ E□

Expansion clamp

7MPa

DoubleactingLarge gripper expansion stroke
The gripper expands horizontally 1.0mm( ), which enables the accommodation of dimensional variations in diecast

CGC

Expansion clamp

bore diameters and ensures workpiece is held securely.
Grip inner diameterø10

Taper rod diameter
ø9.55

Min. grip inner diameterø9.7

Max. grip inner diameterø10.7

Draft angle of grip inner diametermax. 3°each side

Example：model CGC-N22E10：0.7mm stroke for CGC-N21E070, 073, 076, 079, 082

Taper rod and gripper with superior durability① The holding force of expansion clamp is transmitted from tapered surface to gripper, making it possible for the gripper
to hold onto inner face of clamping hole and hold the workpiece on the seating surface for secure workpiece clamping.
② Special steel with superior abrasion resistance is used for gripper to improve durability.
③ Tip section of taper rod has larger diameter than gripper and is well
chamfered to be a better guide when setting the workpiece.
Clamping hole
① Tapered surface③ Taper rod tip section

Gripper② Gripper

Seating surface can be reground (Max.0.1 mm)① When seating surface is damaged, the flange section can be dismounted and reground.
② Flange can be easily dismounted and reassembled at production site.

① Seating surface② Flange18

CGC- N2□ E□

Expansion clamp

7MPa

DoubleactingClamping hole pitch errors can be tolerated

Taper rod and gripper slide radially and tolerate pitch
Expansion clamp

errors (±1mm).
Taper rod and gripper are pushed back towards thecenter by scraper when unclamping.

Allowable eccentricity ±0.5mm

Taper rod

Clamping hole

Allowable eccentricity ±0.5mm

CGC

Gripper
Sliding
Scraper

By the eccentric mechanism, the expansion clamp does not have a workpiece positioning function.

Incorporating strong air blowing circuit
Air blow from a gap between the gripper and scraper clears off metal chips and coolant that stay on the seating
surface. Flushing channel is also provided on the seating surface to remove the metal chips and coolants smoothly
during workpiece setting.

GripperFlushingchannelScraper

Scraper

Seatingsurface

Air blow

Unclamping
hydraulic pressure

To download CAD data / To get updated information, visit www.pascaleng.co.jp19CGC- N2□ E□

Expansion clamp

7MPa

DoubleactingSensor nozzle detects faulty seating of workpiece

1.2mm and over above the seating surface due to its distortion, the workpiece cannot sit fully on the surface andair is exhausted from the sensor nozzle. Incomplete workpiece seating is detected.

Metal chips caught
by clamp

Faulty setting ofworkpiece

CGC

Expansion clamp

If clamping operation is made when metal chips are under the workpiece (Figure 1-a), or when the workpiece is set

Seating surface
Metal chip

Workpiece set
ﬂoating1.2 mm
and over above
seating surface

Sensor nozzle

Sensor nozzle

Figure 1-a

Figure 1-b

Faulty seating of workpiece

Seating completion of workpiece

Sensor air is exhausted from sensor nozzle.
Air sensor is not triggered and faulty
seating of workpiece is detected.

Sensor nozzle is blocked by the workpiece.
Air sensor detects the seating completionof workpiece.

Sensor nozzle

Sensor nozzle

ExhaustClamping
hydraulicpressure

Clamping
hydraulicpressure

Unclamping
hydraulic pressure

20

Unclamping
hydraulic pressure

Sensor air

Clamp condition

Sensor nozzle

Faulty seating ofworkpiece

Open

Air sensor signal

Air sensor OFF(Sensor air flows.)

Hydraulic pressure switch
Clamping
hydraulicpressureON

Sensor air

CGC- N2□ E□

Expansion clamp

7MPa

DoubleactingIncomplete clamping sensor valve detects incomplete clamping
PAT. JP4297511
US8246029
EP2253419

When gripper fails to grip properly due to large draft angle of grip inner diameter (Figure 2-a), incomplete clamping
Expansion clamp

sensor valve is opened. Sensor air is exhausted and this detects incomplete clamping.
When clamping hole exceeds tolerance value (Figure 2-b), or when gripper is broken (Figure 2-c), incomplete clamping
is detected as well.
Clamping hole is large(Full stroke)If gripper is broken

FullstrokeFullstrokeSlipping ofgripper

Figure 2-a

Figure 2-b

Figure 2-c

Incomplete clamping

Clamping completion

Incomplete clamping sensor valve is opened
by piston Ⓐ, sensor air is exhausted. Air
sensor is not triggered and this detects
incomplete clamping.

Incomplete clamping sensor valve remains
closed. Air sensor detects normal clamping
completion.

Incomplete clamping
sensor valve

Incomplete clamping
sensor valve
Piston Ⓐ

Piston Ⓐ

Clamping
hydraulicpressure

Exhaust(Air blow circuit)

CGC

Large draft angle ofgrip inner diameter

Clamping
hydraulicpressure

Unclamping
hydraulic pressure

Sensor air

Clamp condition

Incomplete clamping
sensor valve

Incomplete
clamping

Open

Unclamping
hydraulic pressure

Air sensor signal

Air sensor OFF(Sensor air flows.)

Sensor air

Hydraulic pressure switch
Clamping
hydraulicpressureON

To download CAD data / To get updated information, visit www.pascaleng.co.jp21CGC- N2□ E□

Expansion clamp

7MPa

DoubleactingUnclamping sensor valve detects unclamping operation is complete

CGC

Expansion clamp

Unclamping sensor valve enables sensor to detect unclamping completion. The valve opens to exhaust sensor air evenwhen the workpiece blocks the sensor nozzle.

Unclamping sensor valve will not equipped with the following models.
CGC-N21E070 / 073 / 076 / 079 / 082

Unclamping completion

Clamping completion

Unclamping sensor valve is opened by pistonⒷ and sensor air is exhausted. Air sensor is not
triggered and this detects unclamping
completion.

Unclamping sensor valve is closed byclamping hydraulic pressure. Air sensor
detects normal clamping completion.

Sensor nozzle

Unclamping
sensor valve

Unclamping
sensor valve

Clamping
hydraulicpressure

Piston Ⓑ

Exhaust(Air blow circuit)

22

Unclamping
hydraulic pressure

Unclamping
hydraulic pressure

Sensor air

Clamp condition

Unclamping sensor valve

Air sensor signal

Unclamping
completionOpen

Air sensor OFF

Clamping
completion

Close

Air sensor ON(Sensor air flows.)(Sensor air does not flow.)

Hydraulic pressure switch
Unclamping
hydraulic ON
pressure
Clamping
hydraulicpressureON

Sensor air

CGC- N2□ E□

Expansion clamp

7MPa

Unclamping completion

DoubleactingClamping completion

Unclamping
sensor valve

CGC

Unclamping
sensor valve

Expansion clamp

Sensor nozzle

Clamping
hydraulicpressure

Piston Ⓑ

Exhaust(Air blow circuit)

Unclamping
hydraulic pressure

Unclamping
hydraulic pressure

Sensor air

Clamp condition

Sensor nozzle

Incomplete
clamping
sensor valve

Unclamping
sensor valve

Unclamping
completion

Close

Close

Open

Clamping
completion

Close

Close

Close

Sensor air

Air sensor signal

Hydraulic pressure switch

Air sensor OFF

Unclamping
hydraulic ON
pressure(Sensor air flows.)

Clamping
hydraulicpressure

Air sensor ON(Sensor air does not flow.)

Faulty seating of workpieceON

Incomplete clamping

Sensor nozzle

ExhaustIncomplete clamping
sensor valve
Piston Ⓐ

Clamping
hydraulicpressure

Clamping
hydraulicpressure

Unclamping
hydraulic pressure

Exhaust(Air blow circuit)Sensor air

Unclamping
hydraulic pressure

Clamp condition

Sensor nozzle

Incomplete
clamping
sensor valve

Unclamping
sensor valve

Faulty seating ofworkpiece

Open

Close

Close

Air sensor OFF

Incomplete
clamping

Close

Open

Close

Air sensor OFF

Air sensor signal(Sensor air flows.)(Sensor air flows.)

Sensor air

Hydraulic pressure switch
Clamping
hydraulicpressureON

Clamping
hydraulicpressureON

To download CAD data / To get updated information, visit www.pascaleng.co.jp23CGC- N2□ E□

Expansion clamp

7MPa

DoubleactingNon-constant air blow model considerably reduces air consumption

Expansion clamp

PAT. JP5674191
US8800982
EP2543468

The newly developed non-constant air blow model has no open

2 Grippers, 3 Grippers

space between a scraper, a gripper and a rod thereby no air blow

Non-constant air blow model

during machining is required to prevent chips intrusion.

Open space where metal
chips can intrude is removed
during clamping.

The air blow model (See picture on the right), which requires constant air blow during machining, used to consume constantly 50 L/
min (0.3MPa) of air for 12mm of grip inner diameter, however, the4 Grippers (Old model)

CGC

new model requires air blow only when the clamp is in clamp andAir blow model

unclamp action, and when workpiece replacement.

Open space where metal
chips can intrude is createdduring clamping.

This enables significant reduction of air consumption, which helps
promote energy conservation.

Non-constant air blow model

Number of grippers

Grip inner diameter

Clamping force

ø 7.0(Hydraulic pressure 6MPa)

ø 7.3

7.6

1.92 kN

7.9

8.2

2 Grippers

Number of grippers(Hydraulic pressure 7MPa)3.54 kN

10

12

CGC-N21E Grip inner diameter(Hydraulic pressure 6MPa)

CGC-N22E Grip inner diameter(Hydraulic pressure 7MPa)

Grip inner diameterø 11

2.24 kN
3.04 kN

ø 8.5
ø9

Model

13

Clamping force

3.54 kN(Hydraulic pressure 7MPa)

Model

CGC-N22E Grip inner diameter3 Grippers
ø 12 13 14 15 16

7.50 kN(Hydraulic pressure 7MPa)

ø12, ø13 has been available in two different models of the clamping force.

24

CGC-N23E Grip inner diameterCGC- N2□ E□

Expansion clamp

7MPa

DoubleactingSpace where metal chips can intrude is created (Old model)

GripperSpace
ScraperA

Expansion clamp

Rod

B

A
Rod
4 Grippers

Scraper
B

A-A

B-B

CGC

When clamping

Because of space between scraper, gripper and the rod, air blow must always be performed to prevent intrusion of chips.

Secure chip protection

Rod

B

Gripper

Scraper

ScraperPages →26‒29
A

A

Rod
2 Grippers
B

Scraper

A-A

When clamping

B-B

Because there is no space between scraper, gripper and the rod, it is not necessary to perform air blow during cutting process.

Rod

GripperA

A

Scraper

B

Scraper

B

Pages →30‒33
Rod
3 Grippers

Scraper
When clamping

A-A

B-B

Because there is no space between scraper, gripper and the rod, it is not necessary to perform air blow during cutting process.

To download CAD data / To get updated information, visit www.pascaleng.co.jp25CGC- N21E□

Expansion clamp

Non-constant air blow model

7MPa

DoubleactingSeating surface
outer diameter øUE1

Seating surface
inner diameter øT

Sensor nozzle ø1

E2

60°

27

36.6

ø54
A

Expansion clamp
Non-constant air blow model

Dimensions

CGC

A

A-A
34

Details
Rod outer diameter
øF4
øAD
R0.6

30°

8

Gripper outer diameter
øF3

4

°

48
67.5

5 (5°tapering)

5

5.5

30

Clamp removal thread
4-M5×0.8 thread through40±0.005

R5

4-ø8

2

16

0

øS -0.1

19.5

4-ø4.5

Grip inner diameter usage requirements

O-ring AS568-025
Min. 43-O-ring P4

ø33.5-0.025

Min. 8.5

ø34 f 7 -0.050

Blind hole

22.5

Through hole

mm

22

070

CGC-N21E□
073
076
079

082

E1

7.1

7.1

7.3

7.5

7.6

E2

4.7

4.7

4.7

4.7

4.7

ø F3

6.5

6.8

7.1

7.4

7.7

ø F4

6.55

6.85

7.15

7.45

7.75

øS

20.5

20.6

20.9

21.2

21.5

øT

10.6

10.9

11.2

11.5

11.8

● Seating surface hardness is HRC55.

øU

20

20.1

20.4

20.7

21

● The above diagram indicates unclamped condition.

ø AD

5.4

5.7

6

6.3

6.6

Blow air supply port
(Sensor air exhaust port)
5.5 5.5

Clamping hydraulic port

Sensor air supply port

Model

● Mounting screws are not included.
● Material used for O-ring is fluorocarbon (Hardness Hs90).

● CGC-N21E070, 073, 076, 079, 082 are made to order.

26

CGC- N21E□

Expansion clamp

Non-constant air blow model

7MPa

Doubleacting22.5

Clamping hydraulic port

22
Sensor air supply port

27

5.5 5.5

3-Max. ø2.5

Expansion clamp
Non-constant air blow model

Mounting details

ø34 H8+0.039
0

1

Rz6.3
6.3

Rz

Min. 20Rz6.3(H8 range)
Min. 10

4-M4

34

30°

CGC

Blow air supply port
(Sensor air exhaust port)

R0.4
Unclamping hydraulic portside face processing range

(ø3)
ø33.8

+0.2
0

Unclamping hydraulic port

Unclamping hydraulic portbottom face processing range
Rz: ISO4287(1997)：Unclamping hydraulic port must be made on either side or bottom face.

● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp27

CGC- N22E□

Expansion clamp

Non-constant air blow model

7MPa

DoubleactingSeating surface
outer diameter øU
Sensor nozzle ø1

Seating surface
inner diameter øT

60
°

E2

33

43.6

E1

A

Expansion clamp
Non-constant air blow model

Dimensions

ø63

CGC

A

A-A
40

Details
Rod outer diameter
øF4
øAD

R1

30

9
5

Gripper outer diameter
øF3

2

°

Clamp removal thread
4-M6×1 thread through49

R5

4-ø9.568.50

øS -0.1

40±0.005

16

30°

5

4.5

5 (5°tapering)
19.5

4-ø5.5

Grip inner diameter usage requirements

O-ring AS568-029
3-O-ring P5

ø40.5-0.025

Min. 9.5

Min. 5

ø41 f 7 -0.050

Blind hole
26.5
Clamping hydraulic port

Through hole

25.5
Blow air supply port
(Sensor air exhaust port)

mm

085

CGC-N22E□
09

10

E1

8.3

8.3

8.9

E2

4.6

4.6

4.6

ø F3

8

8.5

9.5

ø F4

8.05

8.55

9.55

øS

22.5

22.5

23.5

øT

12.1

12.6

13.6

● Seating surface hardness is HRC55.

øU

22

22

23

● The above diagram indicates unclamped condition.

ø AD

6.3

6.8

7.8

7

7

Model

Sensor air supply port

● Mounting screws are not included.
● Material used for O-ring is fluorocarbon (Hardness Hs90).

● CGC-N22E085 is made to order.

28

CGC- N22E□

Expansion clamp

Non-constant air blow model

7MPa

Doubleacting26.5

25.5

Clamping hydraulic port
Sensor air supply port

7

33

7

3-Max. ø3

Expansion clamp
Non-constant air blow model

Mounting details

CGC

Blow air supply port
(Sensor air exhaust port)
4-M5

ø41 H830°+0.039
0

1

Rz6.3
6.3

Rz

Min. 20Rz6.3(H8 range)
Min. 1040

R0.4
Unclamping hydraulic portside face processing range

(ø3)
ø40.8

+0.2
0

Unclamping hydraulic port

Unclamping hydraulic portbottom face processing range
Rz: ISO4287(1997)：Unclamping hydraulic port must be made on either side or bottom face.

● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp29

CGC- N22E□

Expansion clamp

Non-constant air blow model

7MPa

DoubleactingSeating surface
outer diameter øU
Sensor nozzle ø1

Seating surface
inner diameter øT

60
°

E2

33

43.6

E1

A

Expansion clamp
Non-constant air blow model

Dimensions

ø63

CGC

A

A-A
40

Details
Rod outer diameter
øF4
øAD

R1

30

°

Clamp removal thread
4-M6×1 thread throughGripper outer diameter
øF3

5.6
2

50

R5

4-ø9.569.50

øS -0.1

40±0.005

16

10

30°

5

4.5

5 (5°tapering)

19.5

4-ø5.5

Grip inner diameter usage requirements

O-ring AS568-029

Min. 5.6

3-O-ring P5

ø40.5-0.025

Min. 10.5

ø41 f 7 -0.050

Blind hole
26.5
Clamping hydraulic port

Through hole

25.5
Blow air supply port
(Sensor air exhaust port)

mm

11

CGC-N22E□
12

13

E1

9.4

9.9

10.4

E2

4.7

4.8

4.9

ø F3

10.5

11.5

12.5

ø F4

10.55

11.55

12.55

øS

24.5

25.5

26.5

øT

14.6

15.6

16.6

● Seating surface hardness is HRC55.

øU

24

25

26

● The above diagram indicates unclamped condition.

ø AD

8.2

9.2

10.2

7

7

Model

Sensor air supply port

● Mounting screws are not included.
● Material used for O-ring is fluorocarbon (Hardness Hs90).

30

CGC- N22E□

Expansion clamp

Non-constant air blow model

7MPa

Doubleacting26.5

25.5

Clamping hydraulic port
Sensor air supply port

7

33

7

3-Max. ø3

Expansion clamp
Non-constant air blow model

Mounting details

CGC

Blow air supply port
(Sensor air exhaust port)
4-M5

ø41 H830°+0.039
0

1

Rz6.3
6.3

Rz

Min. 20Rz6.3(H8 range)
Min. 1040

R0.4
Unclamping hydraulic portside face processing range

(ø3)
ø40.8

+0.2
0

Unclamping hydraulic port

Unclamping hydraulic portbottom face processing range
Rz: ISO4287(1997)：Unclamping hydraulic port must be made on either side or bottom face.

● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp31CGC- N23E□

Expansion clamp

Non-constant air blow model

Doubleacting

7MPa

E1

Seating surface
outer diameter øU

Sensor nozzle ø1

Seating surface
inner diameter øT

E2

60
°

43

A

CGC

55.6

A

Expansion clamp
Non-constant air blow model

Dimensions

ø7

7

A-A
48
74

Details
Rod outer diameter
øF4
R1

øAD

°

2

5 (5°tapering)

5

4.5

30

Clamp removal thread
4-M8×1.25 thread through

50

4-ø11

Gripper outer diameter
øF3

69.5

R5

40±0.0050øS -0.1

5.6

13

10

30°

19.5

4-ø6.8O-ring AS568-032

Grip inner diameter usage requirements
ø52.5

Min. 5.6

3-O-ring P5-0.030Min. 10.5

ø53 f 7 -0.060

32

Blind hole

32

Through hole

Blow air supply port
(Sensor air exhaust port)

Clamping hydraulic port

mm

12

CGC-N23E□
13
14
15

16

E1

10.7

10.7

10.7

11

11.5

E2

6

6

6

6

6.1

ø F3

11.5

12.5

13.5

14.5

15.5

ø F4

11.55

12.55

13.55

14.55

15.55

øS

28

28

28

28.5

29.5

øT

15.6

16.6

17.6

18.6

19.6

● Seating surface hardness is HRC55.

øU

27.5

27.5

27.5

28

29

● The above diagram indicates unclamped condition.

ø AD

9.2

10.2

11.2

12.2

13.2

9

9

Model

Sensor air supply port

● Mounting screws are not included.
● Material used for O-ring is fluorocarbon (Hardness Hs90).

● CGC-N23E12, 13, 14, 15, 16 are made to order.

32

CGC- N23E□

Expansion clamp

Non-constant air blow model

7MPa

Doubleacting32

32

Clamping hydraulic port

Sensor air supply port

9

43

9

3-Max. ø3

Expansion clamp
Non-constant air blow model

Mounting details

CGC

Blow air supply port
(Sensor air exhaust port)
4-M6

ø53 H830°+0.046
0

1

Rz6.3
6.3

Rz

Min. 20Rz6.3(H8 range)
Min. 1048

R0.4
Unclamping hydraulic portside face processing range

(ø3)
ø52.8

+0.2
0

Unclamping hydraulic port

Unclamping hydraulic portbottom face processing range
Rz: ISO4287(1997)：Unclamping hydraulic port must be made on either side or bottom face.

● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp

33

CGC- N2□ E□

Expansion clamp

7MPa

DoubleactingGripper set replacement

Gripper set model

Clamp model

CGC-N21EJ070

CGC-N21E070

CGC-N21EJ073

CGC-N21E073

CGC-N21EJ076

CGC-N21E076

CGC-N21EJ079

CGC-N21E079

CGC-N21EJ082

CGC-N21E082

CGC-N22EJ085

CGC-N22E085

CGC-N22EJ09

CGC-N22E09

CGC-N22EJ10

CGC-N22E10

CGC-N22EJ11

CGC-N22E11

CGC-N22EJ12CGC-N22E12

CGC-N22EJ13

CGC-N22E13

CGC-N23EJ12

CGC-N23E12

CGC-N23EJ13

CGC-N23E13

O-ring be replaced after about 200,000 oper-

CGC-N23EJ14

CGC-N23E14

ations. Replace grippers in sets and not just an

CGC-N23EJ15

CGC-N23E15

CGC-N23EJ16

CGC-N23E16

Expansion clamp

Number of grippers

Set description

Scraper × 1

CGC

2 Grippers

3 Grippers

Gripper(Refer to table left)

O-ring × 1

It is recommended that grippers, scraper andindividual gripper. (Refer to the table on theleft for the gripper set model.)Grip inner diameter & rod height when clamping

Rod height10

Rod height (mm)

9

ø1 1

8

6

ø8.5

‒ø1

7

ø7‒

0

Rod height calculation formula
grip inner diameter andø7 ‒ ø8.2：6.58-2.84× Actual
nominal grip diameter difference

ø8.

6

5
-0.3

‒ø1

-0.2

Allowable min.
grip inner diameter

-0.1

0

0.1

Nominalgrip inner diameter

0.2

2

0.3

grip inner diameter andø8.5 ‒ ø10 ：7.82-2.35× Actual
nominal grip diameter difference

0.4

0.5

ø7‒ø8.2
Allowable max.
grip inner diameter

0.6

Allowable max.
grip inner diameterDiﬀerence between actual grip inner diameterand nominal grip diameter (mm)

34

0.7

grip inner diameter andø11 ‒ ø16 ：8.82-2.35× Actual
nominal grip diameter difference

Example：When CGC-N22E10 (Nominal grip diameter : ø10)is clamping ø9.8 hole
Rod height = 7.82 - 2.35 × (-0.2) = 8.29 mm

CGC- N2□ E□

Expansion clamp

7MPa

Doubleacting

System configuration example

Expansion clamp
model CGC

Workpiece
guide 1

Expansion clamp
model CGC

Expansion clamp

Workpiece positioning pin(Round) 2

Workpiece guide

Workpiece positioning pin(Diamond) 2

Workpiece positioning pin(Round) 2

1

CGC

model CGC

Expansion clamp
model CGC

Workpiece guide

1

10mm and overExpansion clamp

Grip inner diameter D

Rod outer
diameter d
Diametral space
D-d and under

Expansion clamp
model CGC

Workpiece positioning pin(Diamond) 2

Expansion clamp
model CGC

1: When using automatic or robotic conveyers, prevent damage to clamp caused from
impact by setting workpiece guides. Using the above guide as reference, accurately
position the holes when using workpiece guides.
2: The expansion clamp does not have a workpiece positioning function.
Install workpiece positioning pins (or similar).

To download CAD data / To get updated information, visit www.pascaleng.co.jp35CGC- N2□ E□

Expansion clamp

7MPa

DoubleactingHydraulic and pneumatic circuit diagram

Expansion clampⒹ Flow control valve②●

P.S. 1Ⓒ

Air sensor unit

(The circuit diagram is subject to change according to the model of sensor.)

①
●

5μm
Clamping
hydraulic pressure

Sensor air
0.2MPa(Recommended air pressure)

P.S. 2Ⓐ Solenoid valve

CGC

5μm
Unclamping
hydraulic pressureⒷ Flow control valve

Air blow((Meter-out control)

Exhaustwhen OFF)

0.3MPa(Recommended air pressure)● Air blow will not be necessary during cutting process. Be sure to air blow upon loading and unloading workpiece
and when clamping and unclamping to remove metal chips and debris.
● The solenoid valve Ⓐ must be closed when checking the operation of the clamp with the air sensor. Also 3
port type of solenoid valve must be used in the circuit. If 2 port type of the valve is used, sensing air cannot be
exhausted and misclamp detection function is disabled.

Air blowing

Incomplete clamping

Clamping
hydraulic pressure

Solenoid valve of

Solenoid valve ofⒶ air blow circuitⒶ air blow circuit

Unclamping
hydraulic pressure

Unclamping
hydraulic pressureON
Air blow

36

OFF
Exhaust(Sensor air)Sensor air

CGC- N2□ E□

Expansion clamp

7MPa

Doubleacting● Operation speed must be adjusted by a meter-out type flow control valve Ⓑ being provided in the unclamping
circuit. By the adjustment, oil flow in unclamping circuit is squeezed and back pressure is generated. The backpressure acts on the piston Ⓐ of the clamp and makes the gripper expand first then the taper rod strokes down
to clamp. If meter-in type flow control valve is installed in the circuit, it dumps the oil rapidly and makes the
Expansion clamp

gripper move very quick which causes incomplete clamping.
● Adjust oil flow when clamping to have the taper rod full stroke in 0.3 sec or over.
Excessive oil flow to the clamp gives impact load and may cause breakage of the parts.
● Provide additional flow control valve Ⓓ to the place of either ① or ② in the circuit diagram to adjust oil flow
when a large discharge volume pump is used for the hydraulic circuit. The flow control valve Ⓑ alone may not

CGC

be good enough to adjust the speed of clamp operation.
Clamping hole

Taper rod

Workpiece

Gripper
SleevePistonⒶ

PistonⒷ

Clamping hydraulic pressure

Unclamping hydraulic pressure

Unclamping hydraulic pressure circuitⒷ Flow control valve

Air sensor unit Ⓒ recommended condition of use

ISA3-F/G series
manufactured by SMC

Supplier andmodel

GPS2-05 , GPS3-E series
manufactured by CKD

Air supply
pressure

0.2 MPa

Inner diameterof pipingø4 mm (ISA3-F：ø2.5 mm)

Overall piping
length5 m or less

● Use a solenoid valve with needle for air sensor
unit Ⓒ and control it supplying air all the time inorder to eliminate intrusion of chips or coolant.
● There is a case that air sensing cannot be madesuccessfully as designed when it is used out of
the usage shown on the left. Contact Technicalservice center for more details.

To download CAD data / To get updated information, visit www.pascaleng.co.jp37

CGC- N2□ E□

Expansion clamp

7MPa

DoubleactingOperation cycle

Expansion clamp

The clamp should be controlled with the cycle in the diagram shown below to detect the operation status exactly.

Case of model CGC-N21E□
Workpiece

State

Clamping

loading

Air blow

ClampingOFF

completion 1(Machining)

Air blowON

Unclamping

Unclamping

Workpiece

completion 2

unloading

Workpiece Clamp
CGC

clamp

UnclampON

4

Air blowOFFON
Sensor air
OFF5

Clamping hydraulicpressure P.S. 1

OFF

ON

OFF

Unclamping hydraulicpressure P.S. 2

ON

OFF

ON

ON or OFF 3

Air sensor

1 : Clamping completion: P.S. 1＝ON

P.S. 2＝OFF

2 : Unclamping completion : P.S. 1＝OFF

P.S. 2＝ON

Air sensor＝ON

3 : ON : Complete clamping OFF : Incomplete clamping
4 : Solenoid valve control
5 : Hydraulic pressure switch, Air sensor signal

Case of model CGC-N22E□, CGC-N23E□
Workpiece

Stateloading

Clamping

Air blow

ClampingOFF

completion 1(Machining)

Air blowON

Unclamping

Air blow

Unclamping

Air blow

Workpiece

OFF

completion 2

ONunloading

Workpiece Clamp
clamp
UnclampON

4

Air blowOFFON
Sensor air
OFF5

Clamping hydraulicpressure P.S. 1

OFF

ON

OFF

Unclamping hydraulicpressure P.S. 2

ON

OFF

ON

ON or OFF 3

Air sensor

1 : Clamping completion

38: P.S. 1＝ON

P.S. 2＝OFF

Air sensor＝ON

2 : Unclamping completion : P.S. 1＝OFF

P.S. 2＝ON

Air sensor＝OFF

3 : ON : Complete clamping

OFF : Incomplete clamping

4 : Solenoid valve control

5 : Hydraulic pressure switch, Air sensor signal

OFFCGC- N2□ E□

Expansion clamp

7MPa

DoubleactingCaution in use

and over except for clamp mounting surface.

● Perform unclamping completion detection, clamping completion detection and incomplete clamping detection with
Expansion clamp● Be sure to make inner diameter of air blow circuit 4 mm

combination actions of pressure switch and sensor shown● Set the workpiece in such a way that the clamping hole ofworkpiece is perpendicular to seating surface. Clamping intilted condition results in uneven contact of gripper within table below. (Refer to hydraulic and pneumatic circuit
diagram on page →36 for details.)
Case of model CGC-N21E□

damage.

● Verify that there are no metal chips or debris on seating
surface of clamping hole and clamp body before setting
workpiece. Allowing intrusion of metal chips results in insecure clamping, which can lead to low grade of machining
accuracy.

● Flaring (Biting) of gripper into workpiece varies depending

Applications

Pressureswitch 1(P.S. 1)Pressureswitch 2(P.S. 2)Air sensor

Unclamping
completion detection

OFF

ON

ー

Clamping
completion detection

ON

OFF

ON

Incomplete
clamping detection

ON

OFF

OFF

Case of model CGC-N22E□, CGC-N23E□

on workpiece material or thermal processing conditions.
With regards to conditions of workpiece and clamping hole,

Applications

Pressureswitch 1(P.S. 1)Pressureswitch 2(P.S. 2)Air sensor

Unclamping
completion detection

OFF

ON

OFF

Clamping
completion detection

ON

OFF

ON

Incomplete
clamping detection

ON

OFF

OFF

refer to page →15. Secure clamping is not possible when
workpiece or clamping hole that does not satisfy these
conditions is used.

● If clamping hole serves as taper hole (cast draft hole with

CGC

hole, which leads to concentration of load that may cause

gradient), then perform test clamping using applicable
workpiece beforehand to verify that there are no problems
with operations.

● Deformation may occur if the thickness of clamping holesection of workpiece is extremely thin. Use applicable
workpiece to perform test clamping beforehand to verify
that there are no deformations in thin portion.

● Supply the dry and filtered air. Particulate size 5μm or lessis recommended.

● Measure seating surface flatness with hydraulic pressure
applied on clamping side, or by applying hydraulic pressure
on neither clamping nor unclamping side.

● Set detection range of air sensor to 0.05 mm and underfrom seating surface. Insert a feeler gauge between workpiece and seating surface to create detection distance inorder to perform setting accurately. Refer to instruction
manual of air sensor for details on setting methods.

To download CAD data / To get updated information, visit www.pascaleng.co.jp

39

CGT- F2□□□

Expansion clamp Long neck

Expansion clamp
Double acting 7 MPa

CGT

CGT
Long neck

Expansion clamp

model

model

40

CGT

7MPa

DoubleactingCGT- F2□□□

Expansion clamp Long neck

Doubleacting

7MPa

Specifications
Size

Grip inner diameter− ：Air blow model1

055 058 061 064 067 070A ： 2 Grippers

1

CGT ー F2

E ： Non-constant
air blow model2：Number of grippers

070 073 076 079 082： 2 Grippers

085

09

10

： 2 Grippers

11

12

13

： 3 Grippers
indicates made to order.

Grip inner diameter

CGT-F21E

CGT-F22E

055 058 061 064 067 070A 070 073 076 079 082 085 09

11

2 Grippers

Number of grippers
kN

1.35

1

1.89

3.04

kN

4.21 1

6.58

9.5 2

Taper rod stroke

mm

4.0

Clamp strokemm

UnclampAllowable eccentricity

3

Recommended
air blow pressure
Recommended
sensor air pressure
Mass

2

3.54
11.1

4.8
1.2

cm

3

1.2

1.5

2.7

cm

3

1.6

2.0

3.5

mm

±0.3

±0.4

MPa

0.3

MPa

0.2
0.27

kg

Recommended tightening
torque of mounting screws 4

13

CGTLong neck

Clamp

12

3 Grippers

Clamping force(hydraulic pressure 7MPa)
Radial expansion force(hydraulic pressure 7MPa)

Cylindercapacity

10

Expansion clamp

CGT-F21-

Size
Model

0.29

0.43

3.5

N･m

7

Aluminum, steel and others (HRC30 or below) Cast iron also usable depending on conditions

Workpiece material
Allowable min.
mm
grip inner diameter
Allowable max.
mm
grip inner diameter
Grip inner diameter tapering angle(Draft angle)

5.2

5.5

5.8

6.1

6.4

6.7

6.7

7.0

7.3

7.6

7.9

8.2

8.7

9.7 10.7 11.7 12.7

5.8

6.1

6.4

6.7

7.0

7.3

7.4

7.7

8.0

8.3

8.6

9.2

9.7 10.7 11.7 12.7 13.7

3°or below
0.1 or below

Grip inner diameter circularity● Pressure range：1.5‒7 MPa (CGT-F21-055, 058, 061, 064, 067, 070A：1.5‒5 MPa, CGT-F22E085：1.5‒6 MPa)
● Proof pressure：10.5 MPa (CGT-F21-055, 058, 061, 064, 067, 070A：7.5 MPa, CGT-F22E085：9 MPa)

● Operating temperature：0‒70 ℃● Fluid used：General mineral based hydraulic oil (ISO-VG32 equivalent)● Please inquire if above terms are not applied.
1：Capacity values for hydraulic pressure of 5 MPa are shown.

2：Capacity values for hydraulic pressure of 6 MPa are shown.

3：By the eccentric mechanism, the expansion clamp does not have a workpiece positioning function.

4：ISO R898 class 12.9

Clamping force & hydraulic pressure
4

Clamping force (kN)CGT-F22E
3

Hydraulic pressure
CGT-F21 Clamping force
F=0.270×P

2
CGT-F21

CGT-F22E Clamping force
F=0.506×P

MPa

1.5

2

3

4

5

6

7

kN 0.41 0.54 0.81 1.08 1.35 1.62 1.89

kN 0.76 1.01 1.52 2.02 2.53 3.04 3.54

1

P：Hydraulic pressure (MPa)
0
1.5

2

3

4

5

Hydraulic pressure (MPa)67● CGT-F21-055, 058, 061, 064, 067, 070A applicable hydraulic pressure
should be 1.5 to 5 MPa.
CGT-F22E085 applicable hydraulic pressure should be 1.5 to 6 MPa.

To download CAD data / To get updated information, visit www.pascaleng.co.jp

41

CGT- F2□□□

Expansion clamp Long neckAir blow model
model

Non-constant air blow model

CGT-F21-

model

CGT-F21E

7MPa

DoubleactingNon-constant air blow model
model

CGT-F22E

2 Grippers

2 Grippers

3 Grippers

ø5.5 5.8 6.1 6.4 6.7 7.0

ø7.0 7.3 7.6 7.9 8.2

ø8.5 9 10

ø11 12 13

Expansion clamp

2 Grippers

CGTLong neckAir blow ：OUT
Sensor air ：Exh.
(Air blow model)

PAT.

Air blow ：IN
Sensor air ：Exh.
(Non-constant air blow model)

Sensor air：IN
Unclamping detection
Incomplete clamping detection

Clamping
hydraulic pressureSpace-saving clamping

Expansion clamp model CGT

42

Unclamping
hydraulic pressure
Outer diameter：15‒24 mm
Outer diameter varies depending
on clamping hole diameter.
Refer to pages →50, 52, 54, 56
for dimensions.

Linear length 31.5 mm

CGT- F2□□□

Expansion clamp Long neck

7MPa

DoubleactingWorkpiece setting (Unclamping completion)① Pistons Ⓐ & Ⓑ, as well as taper rod and gripper are raised by unclamping hydraulic pressure.
② Workpiece unclamping is completed by the sensor air, clamping and unclamping hydraulic pressure.
③ Set the workpiece onto the seating surface.

Taper rod
Workpiece

Seating surface

Scraper

Gripper

Expansion clamp

Piston Ⓐ
Sensor air

SleevePiston Ⓐ

Unclamping completion

Piston Ⓑ

Clamping
Unclamping
hydraulic pressure hydraulic pressure

Sensor air

Clamp condition

Air sensor signal

Unclamping
completion

Air sensor ON(Sensor air does not flow.)

Hydraulic pressure
switchCGTLong neck

Piston Ⓐ blocks air ﬂow channel
to shut air and triggers sensor.

Unclamping
hydraulic ON
pressure

Workpiece holding (Clamping completion)① Piston Ⓑ and taper rod are lowered by clamping hydraulic pressure after releasing unclamping hydraulicpressure.
② The gripper expands horizontally along the tapered surface to grip inner face of clamping hole.
③ The gripper securely grips the inner face of clamping hole and pulls the workpiece down firmly onto theseating surface.
④ Workpiece holding is completed by the sensor air, clamping and unclamping hydraulic pressure.
Clamping hole

Taper rod

Tapered surface
SleeveSeating surface

Workpiece

Air blow model：Exhaust
Piston Ⓐ

Gripper

Sensor air
SleevePiston Ⓐ

Clamping completion
Sleeve pushes down piston Ⓐ, air
ﬂows and sensor is not triggered.

Piston Ⓑ

Non-constant air blow model：
Exhaust(Air blow circuit)

Clamping
Unclamping
hydraulic pressure hydraulic pressure

Sensor air

Clamp condition

Air sensor signal

Clamping
completion

Air sensor OFF(Sensor air flows.)

To download CAD data / To get updated information, visit www.pascaleng.co.jp

Hydraulic pressure
switchClamping
hydraulicpressureON

43

CGT- F2□□□

Expansion clamp Long neck

7MPa

DoubleactingLarge gripper expansion stroke
The gripper expands horizontally 1.0mm( ), which enables the accommodation of dimensional variations in diecast
bore diameters and ensures workpiece is held securely.

CGTLong neck

Expansion clamp

Grip inner diameterø10

Taper rod diameter
ø9.55

Min. grip inner diameterø9.7

Max. grip inner diameterø10.7

Draft angle of grip inner diametermax. 3°each side

Example：model CGT-F22E10：0.6mm stroke for CGT-F21-055, 058, 061, 064, 067, 070A. 0.7mm stroke for CGT-F21E070, 073, 076, 079, 082.

Taper rod and gripper with superior durability① The holding force of expansion clamp is transmitted from tapered surface to gripper, making it possible for the gripper
to hold onto inner face of clamping hole and hold the workpiece on the seating surface for secure workpiece clamping.
② Special steel with superior abrasion resistance is used for gripper to improve durability.
③ Tip section of taper rod has larger diameter than gripper and is well
chamfered to be a better guide when setting the workpiece.
Clamping hole
① Tapered surface③ Taper rod tip section

Gripper② Gripper

Seating surface can be reground (Max. 0.1 mm)① When seating surface is damaged, the flange section can be dismounted and reground.
② Flange can be easily dismounted and reassembled at production site.

① Seating surface② Flange44

CGT- F2□□□

Expansion clamp Long neck

7MPa

DoubleactingClamping hole pitch errors can be tolerated

Taper rod and gripper slide radially and tolerate pitch
errors (±0.6‒0.8 mm).
Taper rod and gripper are pushed back towards thecenter by scraper when unclamping.

Allowable eccentricity±0.3mm (Grip inner diameter 5.5‒7 mm)±0.4mm (Grip inner diameter 7‒13mm)：CGT-F21-070A

Gripper

Clamping hole

Allowable eccentricity±0.3mm (Grip inner diameter 5.5‒7 mm)±0.4mm (Grip inner diameter 7‒13mm)：CGT-F21-070A
Expansion clamp

Taper rod

Sliding

CGTLong neck

Scraper

By the eccentric mechanism, the expansion clamp does not have a workpiece positioning function.

Incorporating strong air blowing circuit
Air blow from a gap between the gripper and scraper clears off metal chips and coolant that stay on the seating
surface. Flushing channel is also provided on the seating surface to remove the metal chips and coolants smoothly
during workpiece setting.

Gripper

ScraperFlushingchannelScraper

Seatingsurface

Unclamping
hydraulic pressure

To download CAD data / To get updated information, visit www.pascaleng.co.jp

Air blow45

CGT- F2□□□

Expansion clamp Long neck

7MPa

DoubleactingDetects clamping hole diameter that is too large
When the inner diameter of clamping hole exceeds tolerance value, then gripper will fail to gain grip on workpieceeven when extended to maximum reach. Piston Ⓐ lowers until end of stroke as it is pushed down by piston Ⓑ andblocks sensor air, which triggers air sensor and detects incomplete clamping.

Large clamping hole diameter

Expansion clamp

Maximum gripper expansion diameter

Seating surface

CGTLong neck

GripperTaper rod

Seating surface

Gripper

Piston Ⓑ

SleeveSensor air

Piston Ⓐ
Piston Ⓐ

Incomplete clamping
Piston Ⓐ lowers until end of
stroke and blocks air, allowing
sensor to detect the pressure.
Piston Ⓑ

Clamping
hydraulic pressure

46

Unclamping
hydraulic pressure

Sensor air

Clamp condition

Air sensor signal

Hydraulic pressure switch

Incomplete clamping

Air sensor ON

Clamping
hydraulic ON
pressure(Sensor air does not flow.)CGT- F2□□□

Expansion clamp Long neck

7MPa

DoubleactingDetects deformation of workpiece and floating of workpiece
When workpiece has significant deformation or when it is set poorly with gap of 1.2 mm above seating surface,then even when the gripper lowers until end of stroke, the workpiece is not held on seating surface. At this time,
piston Ⓐ lowers until end of stroke as it is pushed down by sleeve and blocks sensor air, which triggers air sensor
and detects incomplete clamping.

Faulty setting of workpiece

Incomplete clamping

Piston Ⓐ

Piston Ⓐ lowers until end of
stroke and blocks air, allowing
sensor to detect the pressure.

Workpiece set ﬂoating
1.2 mm and over above
seating surface

CGTLong neckSleeveExpansion clamp

Seating surface

Clamp condition

Incomplete clamping
Clamping
Unclamping
hydraulic pressure hydraulic pressure

Sensor air

Air sensor signal

Hydraulic pressure switch

Air sensor ON(Sensor air does not flow.)

Clamping
hydraulicpressureON

Detects incomplete gripping
When the inner diameter of clamping hole is slightly larger than allowable value, or when the draft angle of grip
inner diameter is large and results in incomplete gripping by the gripper, piston Ⓐ lowers until end of stroke as
sleeve pushes it down and sensor air is blocked, which triggers air sensor and detects incomplete clamping.

Large draft angle of grip inner diameter

Slipping of gripper

Gripper

SleeveIncomplete clamping
Piston Ⓐ lowers until end of
stroke and blocks air, allowing
sensor to detect the pressure.

Piston Ⓐ

Clamp condition

Incomplete clamping
Clamping
Unclamping
hydraulic pressure hydraulic pressure

Sensor air

Air sensor signal

Air sensor ON(Sensor air does not flow.)

Hydraulic pressure switch
Clamping
hydraulicpressure

To download CAD data / To get updated information, visit www.pascaleng.co.jp

ON

47

CGT- F2□□□

Expansion clamp Long neck

7MPa

DoubleactingWith the development of the non-constant air blow expansion clamp, air consumption will be significantly decreased.
The traditional model ordinarily requires 50L/min (0.3MPa) flow rate (when grip inner diameter is ø12). The new model can reduce

Air blow model

Expansion clamp

Number of grippers

Grip inner diameterø 5.5 5.8 6.1
2 Grippers

Clamping force

1.35 kN

Model(Hydraulic pressure 5 MPa)

CGT-F21- Grip inner diameter

Clamping force

Model

CGT
Long neck6.4 6.7 7.0

Non-constant air blow model

Number of grippers

Grip inner diameterø 7.0 7.3 7.6
7.9 8.2
2 Grippers
ø 8.5
ø9

48

10

Number of grippers

Grip inner diameter3 Grippers

ø 11 12 13

1.89 kN(Hydraulic pressure 7 MPa)

CGT-F21E Grip inner diameter3.04 kN(Hydraulic pressure 6 MPa)

3.54 kN

CGT-F22E Grip inner diameter(Hydraulic pressure 7 MPa)

Clamping force

Model

3.54 kN

CGT-F22E Grip inner diameter(Hydraulic pressure 7 MPa)

CGT- F2□□□

Expansion clamp Long neck

7MPa

Doubleactingair consumption and help promote energy conservation. However air blow at time of workpiece replacement is a must.

Space where metal chips can intrude is createdScraper

GripperRodA

Pages →50, 51
BScraperB

Rod

When clamping

2 Grippers

A-A

B-B

Because of space between scraper, gripper and the rod, air blow must always be performed to prevent intrusion of chips.

CGTLong neckA

Expansion clamp

Space

Secure chip protection

Rod

Gripper

A

A

B

Scraper

ScraperPages →52‒55
ScraperRod

2 Grippers
B

When clamping

A-A

B-B

Because of space between scraper, gripper and the rod, air blow must always be performed to prevent intrusion of chips.

Rod

GripperA

A

Scraper
When clamping

Scraper

Scraper

B

B

Pages →56, 57
Rod

3 Grippers

A-A

B-B

Because there is no space between scraper, gripper and the rod, it is not necessary to perform air blow during cutting process.

To download CAD data / To get updated information, visit www.pascaleng.co.jp

49

CGT- F21- □Expansion clamp Long neckAir blow model

Doubleacting7MPaDimensions
Seating surface
outer diameter øU
Seating surface
inner diameter øT

1

23

A

32.6

ø5

60°

A

31
Expansion clamp
Air blow model

A-A

Details

CGTLong neck

Rod outer diameter
Gripper outer diameter
øR
øAD
30°

R0.6

77

2

4

57.5

50 ±0.005

31.5
R5

4-ø8

AA (5°tapering)

5.5

15°

Clamp removal thread
4-M5×0.8 thread through

7.50

øS -0.05

Grip inner diameter usage requirements

19.5

5

4-ø4.5

3-O-ring P4-0.020
ø30 f 7 -0.041

Min. 4

ø29.5

Min. 8O-ring AS568-023

Blind hole21

Through hole

20.5

mm
Blow air supply port

Model

5.5 5.5

CGT- F21-□
055

058

061

064

067

070A

øR

5

5.3

5.6

5.9

6.2

6.5

øS

15

15

15

15

15

15.5

øT

7.8

8.1

8.4

8.7

9

9.3

øU

11

11.6

12.2

12.8

13

13.5

AA

2.5

2.5

3

3

3

3

ø AD

3.8

4.1

4.4

4.7

5.0

5.3

Clamping hydraulic port

Sensor air supply port

● Mounting screws are not included.
● Material used for O-ring is fluorocarbon (Hardness Hs90).
● Seating surface hardness is HRC55.
● The above diagram indicates unclamped condition.

50● CGT-F21-055,058,061,064,067,070A are made to order.

CGT- F21- □Expansion clamp Long neckAir blow model

7MPa

DoubleactingMounting details

21

20.5

Sensor air supply port

5.5 5.5

Clamping hydraulic port

4-M4

Blow air supply port

ø30 H8

30°

1
Rz
6.3

Min. 20

Rz6.3

Rz6.3

+0.0330(H8 range)
Min.10CGTLong neck31

Expansion clamp
Air blow model23

3-Max. ø2.5

R0

.4

Unclamping hydraulic portside face processing range
(ø3)
+0.2

Unclamping hydraulic port

ø29.8 0Unclamping hydraulic portbottom face processing range

Rz: ISO4287(1997)：Unclamping hydraulic port must be made on either side or bottom face.

● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp

51

CGT- F21E□

Expansion clamp Long neckNon-constant air blow model

Doubleacting7MPaDimensions
Seating surface
outer diameter øU
Seating surface
inner diameter øT

1

23

A

32.6

ø5

60°

A

Expansion clamp
Non-constant air blow model

31

A-A

Details

CGTLong neck

Rod outer diameter
øF4
øAD
30°

4

Gripper outer diameter
øF3

2

15°

77.5

50 ±0.005

8

31.5
R5

4-ø8
Clamp removal thread
4-M5×0.8 thread through580

øS -0.1

R0.6

5.5

5 (5°tapering)

Grip inner diameter usage requirements

19.5

5

4-ø4.5

3-O-ring P4-0.020
ø30 f 7 -0.041

Min. 8.5

ø29.5

Min. 4O-ring AS568-023

Blind hole21

Through hole

20.5

mm
Blow air supply port
(Sensor air exhaust port)

5.5 5.5

Clamping hydraulic port

Model

CGT-F21E□
070

073

076

079

082

ø F3

6.5

6.8

7.1

7.4

7.7

ø F4

6.55

6.85

7.15

7.45

7.75

øS

18

18.3

18.6

18.8

18.8

øT

10.6

10.9

11.2

11.5

11.8

øU

16

16.3

16.6

16.9

17.2

ø AD

5.4

5.7

6

6.3

6.6

Sensor air supply port

● Mounting screws are not included.
● Material used for O-ring is fluorocarbon (Hardness Hs90).
● Seating surface hardness is HRC55.
● The above diagram indicates unclamped condition.

52● CGT-F21E070,073,076,079,082 are made to order.

CGT- F21E□

Expansion clamp Long neckNon-constant air blow model

7MPa

DoubleactingMounting details

21

20.5

Sensor air supply port

Clamping hydraulic port

4-M4

Blow air supply port
(Sensor air exhaust port)

ø30 H8

30°

1
Rz
6.3

Min. 20

Rz6.3

Rz6.3

+0.0330(H8 range)
Min.10CGTLong neck31

Expansion clamp
Non-constant air blow model

23

5.5 5.5

3-Max. ø2.5

R0

.4

Unclamping hydraulic portside face processing range
(ø3)
+0.2

Unclamping hydraulic port

ø29.8 0Unclamping hydraulic portbottom face processing range

Rz: ISO4287(1997)：Unclamping hydraulic port must be made on either side or bottom face.

● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp

53

CGT- F22E□

Expansion clamp Long neckNon-constant air blow model

7MPa

DoubleactingDimensions
Seating surface
outer diameter øU
Seating surface
inner diameter øT

29

A

39.6

ø60

Expansion clamp
Non-constant air blow model

60°

A

A-A

38

Details
Rod outer diameter
øF4

CGTLong neck

øAD
R1

30°

2

78.5

59

50 ±0.005

R5

4-ø9.55 (5°tapering)O-ring AS568-027

Grip inner diameter usage requirements

Min. 554-ø5.5

19.5

4

15°

Clamp removal thread
4-M6×1 thread throughGripper outer diameter
øF3

5

31.5

9

0

øS -0.1

3-O-ring P5
Min. 9.5

ø36.5-0.025

ø37 f 7 -0.050

Blind hole25

Through hole

24mm
Blow air supply port
(Sensor air exhaust port)

Model

09

10

ø F3

8

8.5

9.5

ø F4

8.05

8.55

9.55

øS

19.5

20

21

øT

12.1

12.6

13.6

øU

17.5

18

19

ø AD

6.3

6.8

7.8

Clamping hydraulic port

7

7

CGT-F22E□
085

Sensor air supply port

● Mounting screws are not included.
● Material used for O-ring is fluorocarbon (Hardness Hs90).
● Seating surface hardness is HRC55.
● The above diagram indicates unclamped condition.

54● CGT-F22E085 is made to order.

CGT- F22E□

Expansion clamp Long neckNon-constant air blow model

7MPa

DoubleactingMounting details

25

24

Sensor air supply port

4-M5

Clamping hydraulic port

Blow air supply port
(Sensor air exhaust port)

ø37 H8

30°

1
6.3

Rz

Min. 20

Rz6.3

Rz6.3

+0.0390(H8 range)
Min.10CGTLong neck38

Expansion clamp
Non-constant air blow model

7

29

7

3-Max. ø3

R0.4

Unclamping hydraulic portside face processing range(ø3)
Unclamping hydraulic port
+0.2

ø36.8 0Unclamping hydraulic portbottom face processing range

Rz: ISO4287(1997)：Unclamping hydraulic port must be made on either side or bottom face.

● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp

55

CGT- F22E□

Expansion clamp Long neckNon-constant air blow model

Doubleacting7MPaDimensions
Seating surface
outer diameter øU
Seating surface
inner diameter øT

29

A

39.6

ø60

Expansion clamp
Non-constant air blow model

60°

A

A-A

38

Details
Rod outer diameter
øF4

CGTLong neck

øAD
R1

2

Gripper outer diameter
øF3

79.5

R5

4-ø9.55 (5°tapering)

4

15°

Clamp removal thread
4-M6×1 thread through60

50 ±0.005

31.5

10

0

øS -0.1

5.6

30°-0.025

ø37 f 7 -0.050

Min. 5.6

3-O-ring P5

ø36.5

Min. 10.5

O-ring AS568-027

Grip inner diameter usage requirements

19.5

5

4-ø5.5Blind hole25

Through hole

24mm
Blow air supply port
(Sensor air exhaust port)

Model

12

13

ø F3

10.5

11.5

12.5

ø F4

10.55

11.55

12.55

øS

22

23

24

øT

14.6

15.6

16.6

øU

20

21

22

ø AD

8.2

9.2

10.2

Clamping hydraulic port

7

7

CGT-F22E□
11

Sensor air supply port

● Mounting screws are not included.
● Material used for O-ring is fluorocarbon (Hardness Hs90).
● Seating surface hardness is HRC55.
● The above diagram indicates unclamped condition.

56● CGT-F22E13 is made to order.

CGT- F22E□

Expansion clamp Long neckNon-constant air blow model

7MPa

DoubleactingMounting details

25

24

Sensor air supply port

4-M5

Clamping hydraulic port

Blow air supply port
(Sensor air exhaust port)

ø37 H8

30°

1
6.3

Rz

Min. 20

Rz6.3

Rz6.3

+0.0390(H8 range)
Min.10CGTLong neck38

Expansion clamp
Non-constant air blow model

7

29

7

3-Max. ø3

R0.4

Unclamping hydraulic portside face processing range(ø3)
Unclamping hydraulic port
+0.2

ø36.8 0Unclamping hydraulic portbottom face processing range

Rz: ISO4287(1997)：Unclamping hydraulic port must be made on either side or bottom face.

● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp

57

CGT- F2□□□

Expansion clamp Long neck

7MPa

DoubleactingGripper set replacement

Expansion clamp

Number of grippers

Gripper set model

Clamp model

CGT-F21-J055

CGT-F21-055

CGT-F21-J058

CGT-F21-058

CGT-F21-J061

CGT-F21-061

CGT-F21-J064

CGT-F21-064

CGT-F21-J067

CGT-F21-067

CGT-F21-J070A

CGT-F21-070A

CGT-F21EJ070

CGT-F21E070

CGT-F21EJ073

CGT-F21E073

CGT-F21EJ076

CGT-F21E076

CGT-F21EJ079

CGT-F21E079

CGT-F21EJ082

CGT-F21E082

CGT-F22EJ085

CGT-F22E085

CGT-F22EJ09

CGT-F22E09

CGT-F22EJ10

CGT-F22E10

CGT-F22EJ11

CGT-F22E11

CGT-F22EJ12

CGT-F22E12

CGT-F22EJ13

CGT-F22E13

Set description

Scraper × 1

O-ring × 1
CGT-F21-J055‒J070A
are not included.

2 Grippers

CGTLong neck

Gripper(Refer to table left)

It is recommended that grippers, scraper and3 Grippers

O-ring be replaced after about 200,000 operations. Replace grippers in sets and not just an
individual gripper. (Refer to the table on theleft for the gripper set model.)Grip inner diameter & rod height when clamping

Rod height10

Rod height (mm)

9

ø1 1

8

‒ø1

3

ø8.5

‒ø1

7

6

0

ø8.2

‒ø7

-0.2

Allowable min.
grip inner diameter

-0.1

0

0.1

Nominalgrip inner diameter

0.2

0.3

grip inner diameter andø5.5 ‒ ø7 ：6.32-2.35× Actual
nominal grip diameter difference

ø7‒

ø5.5
5
-0.3

Rod height calculation formula

grip inner diameter andø7 ‒ ø8.2：6.58-2.84× Actual
nominal grip diameter difference

(070

0.4

A)

0.5

0.6

ø5.5‒ø7(070A) ø7‒ø8.2
Allowable max.
Allowable max. Allowable max.
grip inner diameter
grip inner diameter grip inner diameterDiﬀerence between actual grip inner diameterand nominal grip diameter (mm)

58

0.7

grip inner diameter andø8.5 ‒ ø10 ：7.82-2.35× Actual
nominal grip diameter difference
grip inner diameter andø11 ‒ ø13 ：8.82-2.35× Actual
nominal grip diameter difference：CGT-F21-070A
Example：When CGT-F22E10 (Nominal grip diameter : ø10)is clamping ø9.8 hole
Rod height = 7.82 - 2.35×(-0.2) = 8.29mm

CGT- F2□□□

Expansion clamp Long neck

7MPa

Doubleacting

System configuration example

model CGT

Expansion clamp

Workpiece positioning pin（Round）2

model CGT

Workpiece
guide 1

1

CGT
Long neck

Workpiece guide

Expansion clamp

Expansion clamp

model CGT

Expansion clamp

Workpiece positioning pin（Diamond）2model CGT

Workpiece positioning pin（Round）2

Workpiece guide

1

10mm and overExpansion clamp

Grip inner diameter D

Rod outer diameter d
Diametral space
D-d and under

Expansion clamp
model CGT

Workpiece positioning pin（Diamond）2Expansion clamp
model CGT

1: When using automatic or robotic conveyers, prevent damage to clamp caused from
impact by setting workpiece guides. Using the above guide as reference, accurately
position the holes when using workpiece guides.
2: The expansion clamp does not have a workpiece positioning function.
Install workpiece positioning pins (or similar).

To download CAD data / To get updated information, visit www.pascaleng.co.jp

59CGT- F2□□□

Expansion clamp Long neck

7MPa

DoubleactingAir blow model hydraulic and pneumatic circuit diagramⒹ Flow control valve②●①●

P.S. 1

Clamping
hydraulic pressure

0.3MPa(Recommended
air pressure)
Air blow

Expansion clamp

P.S. 20.1MPa(Recommended
air pressure)Ⓒ

Air sensor unit

(The circuit diagram is subject to change according to the model of sensor.)

5μm
Unclamping
hydraulic pressure

Sensor airⒷ Flow control valve

0.2MPa(Recommended air pressure)(Meter-out control)

CGTLong neck

5μm● Be sure to air blow upon loading and unloading workpiece and when clamping and unclamping. During cutting,
if chips adhere to the gripper such as when going through the clamping hole, continue air blowing during
processing as well.
● Air blow pressure must be set to 0.1MPa when checking the operation of the clamp with the air sensor.

Air blowing

Clamping

Air blow
Air blowSensor air
ExhaustClamping
hydraulicpressure

Air blow60

Unclamping
hydraulic pressure

Sensor air

Air blow

Unclamping
hydraulic pressure

Sensor air

CGT- F2□□□

Expansion clamp Long neck

7MPa

DoubleactingNon-constant air blow model hydraulic and pneumatic circuit diagram

P.S. 1Ⓐ Solenoid valve

Clamping
hydraulic pressure

0.3MPa(Recommended air pressure)
5μm

Air blow(

P.S. 2

Exhaustwhen OFFⒸ)

Air sensor unit
Expansion clampⒹ Flow control valve②●①●(The circuit diagram is subject to change according to the model of sensor.)

5μm
Unclamping
hydraulic pressure

Sensor air(Meter-out control)● Air blow will not be necessary during cutting process. Be sure to air blow upon loading and unloading workpiece

CGTLong neck

0.2MPa(Recommended air pressure)Ⓑ Flow control valve

and when clamping and unclamping to remove metal chips and debris.
● The solenoid valve Ⓐ must be closed when checking the operation of the clamp with the air sensor. Also 3
port type of solenoid valve must be used in the circuit. If 2 port type of the valve is used, sensing air cannot be
exhausted and clamp detection function is disabled.

Air blowing

Clamping

Air blow

Clamping
hydraulicpressure
Solenoid valve of

Solenoid valve ofⒶ air blow circuitⒶ air blow circuit
Unclamping
hydraulic pressureON
Air blow

Unclamping
hydraulic pressure

Sensor air

Sensor air

OFFExhaust(Sensor air)

To download CAD data / To get updated information, visit www.pascaleng.co.jp

61CGT- F2□□□

Expansion clamp Long neck

7MPa

Doubleacting● Operation speed must be adjusted by a meter-out type flow control valve Ⓑ being provided in the unclamping
circuit. By the adjustment, oil flow in unclamping circuit is squeezed and back pressure is generated. The backpressure acts on the piston Ⓐ of the clamp and makes the gripper expand first then the taper rod strokes down
to clamp. If meter-in type flow control valve is installed in the circuit, it dumps the oil rapidly and makes thegripper move very quick which causes incomplete clamping.
● Adjust oil flow when clamping to have the taper rod full stroke in 0.3 sec or over.
Excessive oil flow to the clamp gives impact load and may cause breakage of the parts.
● Provide additional flow control valve Ⓓ to the place of either ① or ② in the circuit diagram to adjust oil flow

Expansion clamp

when a large discharge volume pump is used for the hydraulic circuit. The flow control valve Ⓑ alone may not
be good enough to adjust the speed of clamp operation.
Taper rod

Clamping hole
Workpiece

CGTLong neck

Gripper
SleevePistonⒶ

PistonⒷ

Clamping hydraulic pressure

Unclamping hydraulic pressure

Unclamping hydraulic pressure circuitⒷ Flow control valve

Air sensor unit Ⓒ recommended condition of use

ISA3-F/G series
Supplier andmodel

Air supply
pressure62

manufactured by SMC

GPS2-05 , GPS3-E series
manufactured by CKD
0.2 MPa

Inner diameterof pipingø4 mm (ISA3-F：ø2.5 mm)

Overall piping
length5 m or less

● Use a solenoid valve with needle for air sensor
unit Ⓒ and control it supplying air all the time inorder to eliminate intrusion of chips or coolant.
● There is a case that air sensing cannot be madesuccessfully as designed when it is used out of
the usage shown on the left. Contact Technicalservice center for more details.

CGT- F2□□□

Expansion clamp Long neck

7MPa

DoubleactingOperation cycle
The clamp should be controlled with the cycle in the diagram shown below to detect the operation status exactly.

Case of air blow model
Workpiece

Stateloading

Clamping

Air blow

Clamping

switchingcompletion 1(Machining)

Air blowswitching

Unclamping

Air blow

Unclamping

Air blow

Workpiece

switchingcompletion 2

switchingunloading

Expansion clamp

Workpiece Clamp
clamp
Unclamp0.3MPa4

Air blow
0.1MPaON
Sensor air

5

Clamping hydraulicpressure P.S. 1

OFF

ON

OFF

Unclamping hydraulicpressure P.S. 2

ON

OFF

ON

OFF or ON 3

Air sensor

1 : Clamping completion: P.S. 1＝ON

CGTLong neck

OFF

ON

P.S. 2＝OFF Air sensor＝OFF

2 : Unclamping completion : P.S. 1＝OFF P.S. 2＝ON

Air sensor＝ON

3 : OFF : Complete clamping ON : Incomplete clamping
4 : Solenoid valve control

5 : Hydraulic pressure switch, Air sensor signal

Case of non-constant air blow model
Workpiece

Stateloading

Clamping

Air blow

ClampingOFF

completion 1(Machining)

Air blowON

Unclamping

Air blow

Unclamping

Air blow

Workpiece

OFF

completion 2

ONunloading

Workpiece Clamp
clamp
UnclampON

4

Air blowOFFON
Sensor air
OFF5

Clamping hydraulicpressure P.S. 1

OFF

ON

OFF

Unclamping hydraulicpressure P.S. 2

ON

OFF

ON

OFF or ON 3

Air sensor

1 : Clamping completion: P.S. 1＝ON

ON

P.S. 2＝OFF Air sensor＝OFF

2 : Unclamping completion : P.S. 1＝OFF P.S. 2＝ON

Air sensor＝ON

3 : OFF : Complete clamping ON : Incomplete clamping
4 : Solenoid valve control
5 : Hydraulic pressure switch, Air sensor signal

To download CAD data / To get updated information, visit www.pascaleng.co.jp

63CGT- F2□□□

Expansion clamp Long neck

7MPa

DoubleactingCaution in use● Be sure to make inner diameter of air blow circuit 4 mm
and over except for clamp mounting surface.

● Perform unclamping completion detection, clamping completion detection and incomplete clamping detection withcombination actions of pressure switch and sensor shownin table below. (Refer to hydraulic and pneumatic circuit● Set the workpiece in such a way that the clamping hole ofdiagram on pages →60, 61 for details.)

workpiece is perpendicular to seating surface. Clamping intilted condition results in uneven contact of gripper with

Expansion clamphole, which leads to concentration of load that may cause
damage.

● Verify that there are no metal chips or debris on seating
surface of clamping hole and clamp body before setting
workpiece. Allowing intrusion of metal chips results in inse-

CGT
Long neckcure clamping, which can lead to low grade of machining
accuracy.

● Flaring (Biting) of gripper into workpiece varies depending
on workpiece material or thermal processing conditions.
With regards to conditions of workpiece and clamping hole,refer to page →41. Secure clamping is not possible when
workpiece or clamping hole that does not satisfy these
conditions is used.

● If clamping hole serves as taper hole (cast draft hole withgradient), then perform test clamping using applicable
workpiece beforehand to verify that there are no problems
with operations.

● Deformation may occur if the thickness of clamping holesection of workpiece is extremely thin. Use applicable
workpiece to perform test clamping beforehand to verify
that there are no deformations in thin portion.

● Supply the dry and filtered air. Particulate size 5μm or lessis recommended.

● Measure seating surface flatness with hydraulic pressure
applied on clamping side, or by applying hydraulic pressure
on neither clamping nor unclamping side.

64

Applications

Pressureswitch 1(P.S. 1)Pressureswitch 2(P.S. 2)Air sensor

Unclamping
completion detection

OFF

ON

ON

Clamping
completion detection

ON

OFF

OFF

Incomplete
clamping detection

ON

OFF

ON

65

CGU- F2□□□

Expansion clamp Eccentric

Expansion clamp
Double acting 7 MPa

CGU

CGU
Eccentric

Expansion clamp

model

model

66

CGU

7MPa

DoubleactingCGU- F2□□□

Expansion clamp Eccentric

Doubleacting

7MPa

Specifications
Size

1− ：Air blow model2

E ： Non-constant

Grip inner diameter：Number of grippers

07

08： 4 Gripper

09

10： 2 Gripper

11

12

CGU ー F2

air blow model： 3 Gripper

13

indicates made to order.

CGU-F2107

Grip inner diameter08

4 Grippers

Number of grippers

CGU-F22E
09

10

11

2 Grippers

kN

1.57

2.76

kN

5.34

9.30

Taper rod stroke

mm

4.8

Clamp stroke

mm

1.2

cm

1.5

cm

3

Unclamp

2.3

2.6
3.5

Allowable eccentricity 1

mm

±0.4

Recommended air blow pressure

MPa

0.3

Recommended sensor air pressure

MPa

0.2

kg

0.88

Mass
Recommended tightening torqueof mounting screws 2

CGU
Eccentric

Clamp
Cylinder capacity

13

3 Grippers

Clamping force(hydraulic pressure 7MPa)
Radial expansion force(hydraulic pressure 7MPa)

3

12Expansion clamp

Size
Model

7

N･m

Aluminum, steel and others (HRC30 or below) Cast iron also usable depending on conditions

Workpiece material
Allowable min. grip inner diameter

mm

6.7

7.7

8.7

9.7

10.7

11.7

12.7

Allowable max. grip inner diameter

mm

7.7

8.7

9.7

10.7

11.7

12.7

13.7

Grip inner diameter tapering angle (Draft angle)

3°below

Grip inner diameter circularity

0.1 below● Pressure range：1.5‒7 MPa● Proof pressure：10.5 MPa● Operating temperature：0‒70 ℃● Fluid used：General mineral based hydraulic oil (ISO-VG32 equivalent)● Please inquire if above terms are not applied.
1：By the eccentric mechanism, the expansion clamp does not have a workpiece positioning function.

2：ISO R898 class 12.9

Clamping force & hydraulic pressure
3

Clamping force (kN)

Hydraulic pressure
CGU-F22 E
2

CGU-F21-

1.5

2

3

4

5

6

7

CGU-F21- Clamping force
F=0.224×P

kN 0.34 0.45 0.67 0.90 1.12 1.34 1.57

CGU-F22E Clamping force
F=0.394×P

kN 0.59 0.79 1.18 1.58 1.97 2.36 2.76

P：Hydraulic pressure (MPa)

1

0
1.5

MPa

2

3

4

5

6

7

Hydraulic pressure (MPa)To download CAD data / To get updated information, visit www.pascaleng.co.jp

67

CGU- F2□□□

Air blow model
model

CGU-F21-

Expansion clamp Eccentric

7MPa

Non-constant air blow model
model

DoubleactingNon-constant air blow model

CGU-F22E

model

CGU-F22E

4 Grippers

2 Grippers

3 Grippers

ø7 8

ø9 10

ø11 12 13

PAT.

CGU
Eccentric

Expansion clamp

Air blow ：OUT
Sensor air ：Exh.
(Air blow model)

Sensor air：IN
Incomplete clamping detection

Unclamping
hydraulicpressure

Clamping
hydraulicpressure

Air blow ：IN
Sensor air ：Exh.
(Non-constant air blow model)

Linear length
18 mmOuter diameter
CGU-F21 - 07 : 20mm
CGU-F21 - 08 : 20mm
CGU-F22E09 : 20mm
CGU-F22E10 : 21mm
CGU-F22E11 : 22mm
CGU-F22E12 : 23mm
CGU-F22E13 : 24mm

Expansion clamp
model CGU

Spacer can adjust the height68

Space-saving clamping

CGU- F2□□□

Expansion clamp Eccentric

7MPa

DoubleactingWorkpiece setting (Unclamping completion)① Taper rod and gripper are raised by pistons Ⓐ, Ⓑ and sleeve.
② Set the workpiece onto the seating surface.

Taper rod
Piston Ⓐ

Seating surface
Air blow model：Exhaust

Workpiece
Gripper

Sensor air

SleeveUnclamping completion
Piston Ⓐ opens air ﬂow channel
to exhaust air and the sensor
does not work.

Piston Ⓑ
Clamp condition

Air sensor signal

Unclamping
completion

Air sensor OFF(Sensor air flows.)

Hydraulic pressure
switchExpansion clamp

Piston Ⓐ

Unclamping
hydraulic ON
pressure

Sensor air
Non-constant air blow model：Exhaust(Air blow circuit)

CGU
Eccentric

Unclamping
hydraulic pressure

Workpiece holding (Clamping completion)① Piston Ⓑ and taper rod lower with piston Ⓐ being held at upper stroke end position by clamping hydraulicpressure.
② The gripper expands horizontally along the tapered surface to grip inner face of clamping hole holding
its position at upper stroke end by piston Ⓐ and sleeve.
③ The gripper securely grips the inner face of clamping hole and pulls the workpiece down firmly onto theseating surface.
④ Workpiece holding is completed by the sensor air, clamping and unclamping hydraulic pressure.
Clamping hole

Taper rod

Tapered surface

Seating surface

Piston Ⓐ

Workpiece

Air blow model：Exhaust

Gripper
Sensor air

SleeveClamping completion
Piston Ⓐ

Piston Ⓐ opens air ﬂow channel
to exhaust air and the sensor
does not work.

Piston Ⓑ

Clamp condition

Air sensor signal

Clamping
completion

Air sensor OFF(Sensor air flows.)

Hydraulic pressure
switchClamping
hydraulicpressureON

Sensor air
Clamping
hydraulicpressure

Non-constant air blow model：Exhaust(Air blow circuit)

To download CAD data / To get updated information, visit www.pascaleng.co.jp

69CGU- F2□□□

Expansion clamp Eccentric

7MPa

DoubleactingLarge gripper expansion stroke
The gripper expands horizontally 1.0mm, which enables the accommodation of dimensional variations in diecast
bore diameters and ensures workpiece is held securely.

Grip inner diameterø10

Taper rod diameter
ø9.55

Min. grip inner diameterø9.7

Max. grip inner diameterø10.7

Draft angle of grip inner diametermax. 3°each side

CGU
Eccentric

Expansion clamp

Example：model CGU-F22E10

Taper rod and gripper with superior durability① The holding force of expansion clamp is transmitted from tapered surface to gripper, making it possible for the gripper
to hold onto inner face of clamping hole and hold the workpiece on the seating surface for secure workpiece clamping.
② Special steel with superior abrasion resistance is used for gripper to improve durability.
③ Tip section of taper rod has larger diameter than gripper and is well
chamfered to be a better guide when setting the workpiece.
Clamping hole
① Tapered surface③ Taper rod tip section② Gripper

Gripper

Seating surface can be reground (Max. 0.1 mm)① When seating surface is damaged, the flange section can be dismounted and reground.
② Flange can be easily dismounted and reassembled at production site.

① Seating surface② Flange70CGU- F2□□□

Expansion clamp Eccentric

Doubleacting

7MPa

Clamping hole pitch errors can be tolerated

Taper rod and gripper slide radially and tolerate pitch
errors (±0.8 mm).
Taper rod and gripper are pushed back towards thecenter by scraper when unclamping.

Allowable eccentricity±0.4 mmTaper rod

Clamping hole

Allowable eccentricity±0.4 mm

Gripper

Sliding

CGU
Eccentric

Expansion clamp

Scraper

By the eccentric mechanism, the expansion clamp does not have a workpiece positioning function.

Incorporating strong air blowing circuit
Air blow from a gap between the gripper and scraper clears off metal chips and coolant that stay on the seating
surface. Flushing channel is also provided on the seating surface to remove the metal chips and coolants smoothly
during workpiece setting.

GripperFlushingchannelScraper

Scraper

Seatingsurface

Unclamping hydraulic pressure

To download CAD data / To get updated information, visit www.pascaleng.co.jp

Air blow71

CGU- F2□□□

Expansion clamp Eccentric

7MPa

DoubleactingDetects clamping hole diameter that is too large
When the inner diameter of clamping hole exceeds tolerance value, then gripper will fail to gain grip on workpieceeven when extended to maximum reach. Piston Ⓐ lowers until end of stroke as it is pushed down by piston Ⓑ andblocks sensor air, which triggers air sensor and detects incomplete clamping.

Large clamping hole diameter
Maximum gripper expansion diameter

Gripper

CGU
Eccentric

Expansion clamp

Seating surface

Taper rod

Piston Ⓑ

Gripper

Piston Ⓐ

Sensor air

SleeveIncomplete clamping

Piston Ⓐ

Piston Ⓐ lowers until end of
stroke and blocks air, allowing
sensor to detect the pressure.

Piston Ⓑ

Clamping
hydraulic pressure

Sensor air

Clamp condition

Air sensor signal

Hydraulic pressure switch

Incomplete
clamping

Air sensor ON

Unclamping
hydraulic pressure

72(Sensor air does not flow.)

Clamping
hydraulicpressureONCGU- F2□□□

Expansion clamp Eccentric

7MPa

DoubleactingDetects deformation of workpiece and floating of workpiece
When workpiece has significant deformation or when it is set poorly with gap of 1.2 mm above seating surface,then even when the gripper lowers until end of stroke, the workpiece is not held on seating surface. At this time,
piston Ⓐ lowers until end of stroke as it is pushed down by sleeve and blocks sensor air, which triggers air sensor
and detects incomplete clamping.

Taper rod

Incomplete clamping
Piston Ⓐ lowers until end of
stroke and blocks air, allowing
sensor to detect the pressure.

Gripper

Faulty settingof workpiece
Seating surface

SleeveWorkpiece set ﬂoating
1.2 mm and over above
seating surface

Piston Ⓐ

Clamping
hydraulicpressure

Air sensor signal

Incomplete
clamping(Sensor air does not flow.)Sensor air

Air sensor ON

Hydraulic pressure
switchClamping
hydraulicpressureON
CGU
Eccentric

Unclamping
hydraulicpressure

Clamp condition

Expansion clamp

Piston Ⓑ

Detects incomplete gripping
When the inner diameter of clamping hole is slightly larger than allowable value, or when the draft angle of grip
inner diameter is large and results in incomplete gripping by the gripper, piston Ⓐ lowers until end of stroke as
sleeve pushes it down and sensor air is blocked, which triggers air sensor and detects incomplete clamping.

Taper rod

Incomplete clamping
Piston Ⓐ lowers until end of
stroke and blocks air, allowing
sensor to detect the pressure.

Gripper

Large draft angleof grip inner diameter

SleeveSlipping of gripper

Piston Ⓐ

Piston Ⓑ

Unclamping
hydraulicpressure

Clamping
hydraulicpressure

Sensor air

Clamp condition

Air sensor signal

Incomplete
clamping

Air sensor ON(Sensor air does not flow.)

To download CAD data / To get updated information, visit www.pascaleng.co.jp

Hydraulic pressure
switchClamping
hydraulicpressureON

73

CGU- F2□□□

Expansion clamp Eccentric

7MPa

DoubleactingWith the development of the non-constant air blow expansion clamp, air consumption will be significantly decreased.
The traditional model ordinarily requires 50L/min (0.3MPa) flow rate (when grip inner diameter is ø12). The new model can reduce

Air blow model

Number of grippers

ø7

Clamping force

1.57 kN

8(Hydraulic pressure 7 MPa)

Model

CGU-F21- Grip inner diameter

Expansion clamp

4 Grippers

Grip inner diameter

CGU
Eccentric

Non-constant air blow model

Number of grippers

2 Grippers

Number of grippers

3 Grippers

74

Grip inner diameterø92.76 kN

10(Hydraulic pressure 7 MPa)

Grip inner diameter

ø 11

12

Clamping force

13

Clamping force

2.76 kN(Hydraulic pressure 7 MPa)

Model

CGU-F22E Grip inner diameter

Model

CGU-F22E Grip inner diameterCGU- F2□□□

Expansion clamp Eccentric

7MPa

Doubleactingair consumption and help promote energy conservation. However air blow at time of workpiece replacement is a must.

Space where metal chips can intrude is created

GripperSpace
ScraperA

B

A

Pages →76, 77

Rod
4 Grippers

ScraperB

When clamping

B-B

A-A

Expansion clamp

Rod

Because of space between scraper, gripper and the rod, air blow must always be performed to prevent intrusion of chips.

CGU
Eccentric

Secure chip protection

B

GripperRod

Scraper

ScraperPages →78, 79
AARod
2 Grippers
B

Scraper

A-A

When clamping

B-B

Because there is no space between scraper, gripper and the rod, it is not necessary to perform air blow during cutting process.

Rod

Scraper

Gripper

B
A

Scraper

B

Pages →80, 81

ARod
3 Grippers
Scraper
When clamping

A-A

B-B

Because there is no space between scraper, gripper and the rod, it is not necessary to perform air blow during cutting process.

To download CAD data / To get updated information, visit www.pascaleng.co.jp75

CGU- F21- □Expansion clamp Eccentric

Air blow model

7MPa

DoubleactingDimensions
13

4-ø5.5
Spot facing ø9.5

Seating surface
outer diameter øU

21

A

60°

39

A

49.6

Seating surface
inner diameter øT

ø6

0

A-A
14.2

Details
Rod outer diameter
Gripper outer diameter
øR

AE

F2
(55)

43.5

2

F1

75 ±0.01

CGU
Eccentric

M

30°

10°

0

øS -0.1

18

Expansion clamp
Air blow modeløAD5 (5°tapering)

4

Grip inner diameter usage requirements

Min. F2

19
Min. F1+0.5

Positioning pin
ø3×8

4-O-ring P5

Blind hole

Clamping hydraulic port

Through holeSensor air supply port

12

mm

08

F1

8

9

F2

4

5

M

83

84

øR

6.5

7.5

øS

20

20

øT

10.6

11.6

● Mounting screws are not included.

øU

18

18

● Material used for O-ring is fluorocarbon (Hardness Hs90).

ø AD

4.8

5.8

AE

R0.6

R1

12

07

Unclamping
hydraulic port

21.5
19

25

Blow air supply port

● Seating surface hardness is HRC55.
● The above diagram indicates unclamped condition.

76

Model

CGU-F21-□● CGU-F21-07, 08 are made to order.

Expansion clamp Eccentric

Air blow model

7MPa

DoubleactingMounting details

13

21

Blow air supply port
4-Max.ø3

Unclamping hydraulic port

12

Sensor air supply port

1239

Clamping hydraulic port

(Positioning pin hole)

21.5
19

4-M5

25

● The mounting surface finish must be no rougher than Rz6.3 (ISO4287:1997).

Expansion clamp
Air blow model+0.014
ø3 H8 0 depth 5

CGU
Eccentric

CGU- F21- □To download CAD data / To get updated information, visit www.pascaleng.co.jp

77CGU- F22E□

Expansion clamp Eccentric

Non-constant air blow model

7MPa

DoubleactingDimensions
4-ø5.5
Spot facing ø9.5

13

Seating surface
outer diameter øU

21

A

60°

39

A

49.6

Seating surface
inner diameter øT

ø6

0

A-A
B

Details

øAD
R1

9

10°

0

Gripper outer diameterøF3

75 ±0.01

5 (5°tapering)
43.5

(55)

84

2

5

øS -0.1

18

30°

CGU
Eccentric

Expansion clamp
Non-constant air blow model

Rod outer diameterøF4

4

Grip inner diameter usage requirements

Min. 519
4-O-ring P5
Min. 9.5

Positioning pin
ø3×8

Blind hole

Clamping hydraulic port

Through holeSensor air supply port

Model

09

10

B

14.2

14.9

ø F3

8.5

9.5

ø F4

8.55

9.55

øS

20

21

øT

12.6

13.6

øU

18

19

ø AD

6.8

7.8

12

12

mm

CGU-F22E□

Unclamping
hydraulic port

21.5
19

25

Blow air supply port
(Sensor air exhaust port)● Mounting screws are not included.
● Material used for O-ring is fluorocarbon (Hardness Hs90).
● Seating surface hardness is HRC55.
● The above diagram indicates unclamped condition.

78● CGU-F22E09, 10 are made to order.

Expansion clamp Eccentric

Non-constant air blow model

7MPa

DoubleactingMounting details

13

Blow air supply port
(Sensor air exhaust port)

21

4-Max.ø3
Unclamping hydraulic port

12

Sensor air supply port

1239

Clamping hydraulic port

(Positioning pin hole)

21.5
19

4-M5

25

● The mounting surface finish must be no rougher than Rz6.3 (ISO4287:1997).

Expansion clamp
Non-constant air blow model+0.014
ø3 H8 0 depth 5

CGU
Eccentric

CGU- F22E□

To download CAD data / To get updated information, visit www.pascaleng.co.jp

79CGU- F22E□

Expansion clamp Eccentric

Non-constant air blow model

Doubleacting7MPaDimensions
4-ø5.5
Spot facing ø9.5

13

Seating surface
outer diameter øU

21

Seating surface
inner diameter øT

a

60°

39

49.6

a

øA
a-a

B

DetailsøAD
R1

Gripper outer diameter
øF3

2

5.6

10

75 ±0.01

5 (5°tapering)
43.5

(55)

85

10°

0

øS -0.1

18

30°

CGU
Eccentric

Expansion clamp
Non-constant air blow model

Rod outer diameterøF4

4

Grip inner diameter usage requirements

4-O-ring P5

Min. 5.6

19
Min. 10.5

Positioning pin
ø3×8

Blind hole

Clamping hydraulic port

Through holeSensor air supply port

12

mm
Model

12

13

øA

60

62

62

B

15.6

16.3

17

ø F3

10.5

11.5

12.5

ø F4

10.55

11.55

12.55

øS

22

23

24

øT

14.6

15.6

16.6

● Material used for O-ring is fluorocarbon (Hardness Hs90).

øU

20

21

22

● Seating surface hardness is HRC55.

ø AD

8.2

9.2

10.2

12

11

Unclamping
hydraulic port

21.5
19

25

Blow air supply port
(Sensor air exhaust port)● Mounting screws are not included.

● The above diagram indicates unclamped condition.

80

CGU-F22E□● CGU-F22E11, 12, 13 are made to order.

Expansion clamp Eccentric

Non-constant air blow model

7MPa

DoubleactingMounting details

13

Blow air supply port
(Sensor air exhaust port)

21

4-Max.ø3
Unclamping hydraulic port

12

Sensor air supply port

1239

Clamping hydraulic port

(Positioning pin hole)

21.5
19

4-M5

25

● The mounting surface finish must be no rougher than Rz6.3 (ISO4287:1997).

Expansion clamp
Non-constant air blow model+0.014
ø3 H8 0 depth 5

CGU
Eccentric

CGU- F22E□

To download CAD data / To get updated information, visit www.pascaleng.co.jp

81CGU- F2□□□

Expansion clamp Eccentric

7MPa

DoubleactingGripper set replacement

Number of grippers

Gripper set model

Clamp model

CGU-F21-J07

CGU-F21-07

Set description

Scraper × 1

4 Grippers
CGU-F21-J08

Gripper(Refer to table left)

CGU-F21-08
O-ring × 1

CGU-F22EJ09

CGU-F22E09

CGU-F22EJ10

CGU-F22E10

CGU-F22EJ11

CGU-F22E11

Expansion clamp

2 Grippers

It is recommended that grippers, scraper andO-ring be replaced after about 200,000 oper3 Grippers

CGU-F22EJ12CGU-F22E12

ations. Replace grippers in sets and not just an
individual gripper. (Refer to the table on theleft for the gripper set model.)CGU-F22E13

CGU
Eccentric

CGU-F22EJ13

Grip inner diameter & rod height when clamping

Rod height10

Rod height (mm)

9

ø1 1

8

‒ø1

3

ø8‒

ø10

7

Rod height calculation formula
ø7

6

5
-0.3

-0.2

Allowable min.
grip inner diameter

-0.1

0

0.1

Nominalgrip inner diameter

0.2

0.3

0.4

0.5

0.6

Allowable max.
grip inner diameterDiﬀerence between actual grip inner diameterand nominal grip diameter (mm)
82

0.7

ø7

grip inner diameter and：6.82-2.35× Actual
nominal grip diameter difference

ø8grip inner diameter and‒ ø10：7.82-2.35× Actual
nominal grip diameter difference

grip inner diameter andø11 ‒ ø13：8.82-2.35× Actual
nominal grip diameter difference

Example：When CGU-F22E10 (Nominal grip diameter : ø10)is clamping ø9.8 hole
Rod height = 7.82 - 2.35×(-0.2) = 8.29mm

CGU- F2□□□

Expansion clamp Eccentric

Doubleacting

7MPa

System configuration example

Expansion clamp

Workpiece positioning pin（Round）2

model CGU

Workpiece
guide 1

Workpiece guide

Expansion clamp
model CGU

1Expansion clamp

Workpiece positioning pin（Diamond）2model CGU

Workpiece guide1

Grip inner diameter D
CGU
Eccentric

Workpiece positioning pin（Round）2

Expansion clamp

model CGU

10mm and overExpansion clamp

Rod outer diameter d

Diametral space
D-d and underSpacerWorkpiece positioning pin（Diamond）2Expansion clamp
model CGU

1: When using automatic or robotic conveyers, prevent damage to clamp caused from
impact by setting workpiece guides. Using the above guide as reference, accurately
position the holes when using workpiece guides.
2: The expansion clamp does not have a workpiece positioning function.
Install workpiece positioning pins (or similar).

To download CAD data / To get updated information, visit www.pascaleng.co.jp

83CGU- F2□□□

Expansion clamp Eccentric

7MPa

DoubleactingAir blow model hydraulic and pneumatic circuit diagramⒹ Flow control valve②●①●

P.S. 1

Clamping
hydraulic pressure

0.3MPa(Recommended
air pressure)

5μm

Air blow
0.1MPa(Recommended
air pressure)

P.S. 2Ⓒ

Air sensor unit

(The circuit diagram is subject to change according to the model of sensor.)

5μm
Unclamping
hydraulic pressureⒷ Flow control valve

Expansion clamp(Meter-out control)

Sensor air
0.2MPa(Recommended air pressure)● Be sure to air blow upon loading and unloading workpiece and when clamping and unclamping. During cutting,
if chips adhere to the gripper such as when going through the clamping hole, continue air blowing during
processing as well.

CGU
Eccentric● Air blow pressure must be set to 0.1MPa when checking the operation of the clamp with the air sensor.

Air blowing

Clamping

Air blowSensor air
ExhaustAir blowSensor air
ExhaustClamping
hydraulic pressure

Air blow

Unclamping
hydraulicpressure

84

Sensor air

Air blow

Unclamping
hydraulicpressure

Sensor air

CGU- F2□□□

Expansion clamp Eccentric

7MPa

DoubleactingNon-constant air blow model hydraulic and pneumatic circuit diagramⒹ Flow control valve②●①●

P.S. 1

Clamping
hydraulic pressureⒶ Solenoid valve

0.3MPa(Recommended air pressure)
5μm

Air blow(

P.S. 2

Exhaustwhen OFFⒸ)

Air sensor unit

(The circuit diagram is subject to change according to the model of sensor.)

5μm
Sensor air(Meter-out control)

0.2MPa(Recommended air pressure)

Expansion clamp

Unclamping
hydraulic pressureⒷ Flow control valve● Air blow will not be necessary during cutting process. Be sure to air blow upon loading and unloading workpiece
and when clamping and unclamping to remove metal chips and debris.
● The solenoid valve Ⓐ must be closed when checking the operation of the clamp with the air sensor. Also 3

CGU
Eccentric

port type of solenoid valve must be used in the circuit. If 2 port type of the valve is used, sensing air cannot be
exhausted and clamp detection function is disabled.

Air blowing

Clamping

Air blow

Clamping
hydraulic pressureⒶ Solenoid valve ofⒶ Solenoid valve of

air blow circuit

air blow circuit

Unclamping
hydraulicpressureON

Unclamping
hydraulicpressure

Sensor air

Air blow

To download CAD data / To get updated information, visit www.pascaleng.co.jp

OFF
Exhaust(Sensor air)85

CGU- F2□□□

Expansion clamp Eccentric

7MPa

Doubleacting● Operation speed must be adjusted by a meter-out type flow control valve Ⓑ being provided in the unclamping
circuit. By the adjustment, oil flow in unclamping circuit is squeezed and back pressure is generated. The backpressure acts on the piston Ⓐ of the clamp and makes the gripper expand first then the taper rod strokes down
to clamp. If meter-in type flow control valve is installed in the circuit, it dumps the oil rapidly and makes thegripper move very quick which causes incomplete clamping.
● Adjust oil flow when clamping to have the taper rod full stroke in 0.3 sec or over.
Excessive oil flow to the clamp gives impact load and may cause breakage of the parts.
● Provide additional flow control valve Ⓓ to the place of either ① or ② in the circuit diagram to adjust oil flow
when a large discharge volume pump is used for the hydraulic circuit. The flow control valve Ⓑ alone may not
be good enough to adjust the speed of clamp operation.

Clamping hole

Taper rod

Workpiece

Expansion clamp

Gripper
SleevePistonⒶ

CGU
Eccentric

PistonⒷ

Unclamping hydraulic pressure

Clamping hydraulic pressure

Unclamping hydraulic pressure circuitⒷ Flow control valve

Air sensor unit Ⓒ recommended condition of use

ISA3-F/G series
Supplier andmodel

Air supply
pressure86

manufactured by SMC

GPS2-05 , GPS3-E series
manufactured by CKD
0.2 MPa

Inner diameterof pipingø4 mm (ISA3-F：ø2.5 mm)

Overall piping
length5 m or less

● Use a solenoid valve with needle for air sensor
unit Ⓒ and control it supplying air all the time inorder to eliminate intrusion of chips or coolant.
● There is a case that air sensing cannot be madesuccessfully as designed when it is used out of
the usage shown on the left. Contact Technicalservice center for more details.

CGU- F2□□□

Expansion clamp Eccentric

7MPa

DoubleactingOperation cycle
The clamp should be controlled with the cycle in the diagram shown below to detect the operation status exactly.

Case of air blow model
Workpiece

State

Clamping

loading

Air blow

Clamping

switchingcompletion 1(Machining)

Air blowswitching

Unclamping

Unclamping

Workpiece

completion 2

unloading

Workpiece Clamp
clamp
Unclamp0.3MPa4

Air blow
0.1MPaON
Sensor air

OFF

ON

OFF

Unclamping hydraulicpressure P.S. 2

ON

OFF

ON

OFF or ON 3

Air sensor

1 : Clamping completion: P.S. 1＝ON

CGU
Eccentric5

Clamping hydraulicpressure P.S. 1

Expansion clamp

OFF

P.S. 2＝OFF Air sensor＝OFF

2 : Unclamping completion : P.S. 1＝OFF P.S. 2＝ON
3 : OFF : Complete clamping ON : Incomplete clamping
4 : Solenoid valve control

5 : Hydraulic pressure switch, Air sensor signal

Case of non-constant air blow model
Workpiece

State

Clamping

loading

Air blow

ClampingOFF

completion 1(Machining)

Air blowON

Unclamping

Unclamping

Workpiece

completion 2

unloading

Workpiece Clamp
clamp
UnclampON

4

Air blowOFFON
Sensor air
OFF5

Clamping hydraulicpressure P.S. 1

OFF

ON

OFF

Unclamping hydraulicpressure P.S. 2

ON

OFF

ON

OFF or ON 3

Air sensor

1 : Clamping completion: P.S. 1＝ON

P.S. 2＝OFF Air sensor＝OFF

2 : Unclamping completion : P.S. 1＝OFF P.S. 2＝ON
3 : OFF : Complete clamping ON : Incomplete clamping
4 : Solenoid valve control
5 : Hydraulic pressure switch, Air sensor signal

To download CAD data / To get updated information, visit www.pascaleng.co.jp

87CGU- F2□□□

Expansion clamp Eccentric

7MPa

DoubleactingCaution in use● Be sure to make inner diameter of air blow circuit 4 mm
and over except for clamp mounting surface.

● Perform unclamping completion detection, clamping completion detection and incomplete clamping detection withcombination actions of pressure switch and sensor shownin table below. (Refer to hydraulic and pneumatic circuit● Set the workpiece in such a way that the clamping hole ofdiagram on page →84, 85 for details.)

workpiece is perpendicular to seating surface. Clamping intilted condition results in uneven contact of gripper withhole, which leads to concentration of load that may cause
damage.

● Verify that there are no metal chips or debris on seating
surface of clamping hole and clamp body before setting
workpiece. Allowing intrusion of metal chips results in inse-

Expansion clamp

cure clamping, which can lead to low grade of machining
accuracy.

● Flaring (Biting) of gripper into workpiece varies depending
on workpiece material or thermal processing conditions.

CGU
Eccentric

With regards to conditions of workpiece and clamping hole,refer to page → 67 Secure clamping is not possible when
workpiece or clamping hole that does not satisfy these
conditions is used.

● If clamping hole serves as taper hole (cast draft hole withgradient), then perform test clamping using applicable
workpiece beforehand to verify that there are no problems
with operations.

● Deformation may occur if the thickness of clamping holesection of workpiece is extremely thin. Use applicable
workpiece to perform test clamping beforehand to verify
that there are no deformations in thin portion.

● Supply the dry and filtered air. Particulate size 5μm or lessis recommended.

● Measure seating surface flatness with hydraulic pressure
applied on clamping side, or by applying hydraulic pressure
on neither clamping nor unclamping side.

88

Applications

Pressureswitch 1(P.S. 1)Pressureswitch 2(P.S. 2)Air sensor

Unclamping
completion detection

OFF

ON

ー

Clamping
completion detection

ON

OFF

OFF

Incomplete
clamping detection

ON

OFF

ON

89

CGE- N22E□

Air expansion clamp

ａｉｒ

air Expansion clamp
Double acting 1 MPa

CGE

CGE

Air expansion clamp

model

model

90

CGE

DoubleactingCGE- N22E□

Air expansion clamp

ａｉｒ

DoubleactingSpecifications
Grip inner diameter

CGE ー N22E

070

073

076

085

09

10

11

12

13

：Number of grippers

079

082

：2 Grippers：3 Grippers

indicates made to order.

CGE-N22E

Model

070

073

076

079

082

085

09

10

11

2 Grippers

Number of grippers

0.81

kN

Radial expansion force (air pressure 0.5MPa)kN

Taper rod stroke

mm

4.8

Clamp stroke

mm

1.2

2.81

2.52

Clamp

cm

3

8.7

Unclampcm 3

9.7

Allowable eccentricity 1

mm

±0.5

Recommended air blow pressure

MPa

0.3

Recommended sensor air pressure

MPa

0.2

Mass

0.74

kg

Recommended tightening
torque of mounting screws 2

0.75
7

N･m

Aluminum, steel and others (HRC25 or below).

Workpiece material

13

3 Grippers

Clamping force (air pressure 0.5MPa)

Cylinder capacity

12

Cast iron are not usable.

Allowable min. grip inner diameter

mm

6.7

7.0

7.3

7.6

7.9

8.2

8.7

9.7

10.7

11.7

12.7

Allowable max. grip inner diameter

mm

7.4

7.7

8.0

8.3

8.6

9.2

9.7

10.7

11.7

12.7

13.7

3°or below

Grip inner diameter circularity

0.1 or below● Proof pressure：1.5 MPa● Operating temperature：0‒70 ℃● Fluid used：Air

CGE

Grip inner diameter tapering angle (Draft angle)● Pressure range：0.3‒1 MPa

Air expansion clamp

Grip inner diameter● Please inquire if above terms are not applied.
1：By the eccentric mechanism, the expansion clamp does not have a workpiece positioning function.

2：ISO R898 class 12.9

Clamping force & air pressure
1.8
1.6

CGE-N22E

Clamping force (kN)

1.4
1.2

Air pressure

1.0

MPa 0.3

Clamping force

0.8

F=1.617×P

0.4

0.5

0.6

0.7

0.8

0.9

1.0

kN 0.49 0.65 0.81 0.97 1.13 1.29 1.46 1.62

0.6

P：Air pressure (MPa)
0.4
0.2
0

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

Air pressure (MPa)To download CAD data / To get updated information, visit www.pascaleng.co.jp

91CGE- N22E□

model

Air expansion clamp

CGE-N22E

model

ａｉｒ

CGE-N22E

model

DoubleactingCGE-N22E

2 Grippers

2 Grippers

3 Grippers

ø7.0 7.3 7.6 7.9 8.2

ø8.5 9 10

ø11 12 13

Sensor nozzle

PAT.

Unclamping sensor valve

CGE

Air expansion clamp

Incomplete clamping sensor valve

Sensor air：IN

Air blow：IN
Unclamping detection ：Exh.
Incomplete clamping detection ：Exh.

Workpiece seating detection
Unclamping detection
Incomplete clamping detection

Superior tool accessibility

Short tool

Dramatically improved flatness & roughness

Non-distorted clamping at bottom of workpiece

Tilted ﬂange reduces
accumulation of chips
Adequate space prevents
clogging of metal chips

Bore depth
20 mm (CGE-N22)

Short lift stroke
Compact ＆ simple jig
Air expansion clamp model CGE

92

Thinner jig palletCGE- N22E□

Air expansion clamp

ａｉｒ

DoubleactingWorkpiece setting① Taper rod and gripper are raised by pistons Ⓐ, Ⓑ and sleeve. The gripper is drawn inward within the taper
rod diameter.
② Set the workpiece onto the seating surface.

Taper rod

Workpiece

Gripper

Seating surface

SleevePiston Ⓐ

Piston Ⓑ

Unclamping
air pressure

Air expansion clamp

Clamping
air pressure

Workpiece holding① Piston Ⓑ and taper rod lower with piston Ⓐ being held at upper stroke end position by clamping air
pressure.

CGE② The gripper expands horizontally along the tapered surface to grip inner face of clamping hole holding
its position at upper stroke end by piston Ⓐ and sleeve.
③ The gripper securely grips the inner face of clamping hole and pulls the workpiece down firmly onto theseating surface.
Clamping hole

Tapered surface

Workpiece

Taper rod

Gripper

Seating surface

SleevePiston Ⓐ

Piston Ⓑ

Clamping
air pressure

Unclamping
air pressure

To download CAD data / To get updated information, visit www.pascaleng.co.jp93CGE- N22E□

Air expansion clamp

ａｉｒ

DoubleactingLarge gripper expansion stroke
The gripper expands horizontally 1.0mm( ), which enables the accommodation of dimensional variations in diecast
bore diameters and ensures workpiece is held securely.
Grip inner diameterø10

Taper rod diameter
ø9.55

Min. grip inner diameterø9.7

Max. grip inner diameterø10.7

Draft angle of grip inner diametermax. 3°each side

Example：model CGE-N22E10：0.7mm stroke for CGE-N22E070, 073, 076, 079, 082

Taper rod and gripper with superior durability① The holding force of expansion clamp is transmitted from tapered surface to gripper, making it possible for the gripper
to hold onto inner face of clamping hole and hold the workpiece on the seating surface for secure workpiece clamping.

Air expansion clamp② Special steel with superior abrasion resistance is used for gripper to improve durability.
③ Tip section of taper rod has larger diameter than gripper and is well
chamfered to be a better guide when setting the workpiece.
Clamping hole
① Tapered surface③ Taper rod tip section

GripperCGE② Gripper

Seating surface can be reground (Max. 0.1 mm)① When seating surface is damaged, the flange section can be dismounted and reground.
② Flange can be easily dismounted and reassembled at production site.

① Seating surface② Flange94

CGE- N22E□

Air expansion clamp

ａｉｒ

DoubleactingClamping hole pitch errors can be tolerated

Taper rod and gripper slide radially and tolerate pitch
errors (±1mm).
Taper rod and gripper are pushed back towards thecenter by scraper when unclamping.

Taper rod

Allowable eccentricity ±0.5mm

Clamping hole

Allowable eccentricity ±0.5mm

Gripper
Sliding

Air expansion clamp

Scraper

By the eccentric mechanism, the expansion clamp does not have a workpiece positioning function.

Incorporating strong air blowing circuit

CGE

Air blow from a gap between the gripper and scraper clears off metal chips and coolant that stay on the seating
surface. Flushing channel is also provided on the seating surface to remove the metal chips and coolants smoothly
during workpiece setting.

GripperFlushingchannelScraper

Seatingsurface

Air blow

Unclamping
air pressure

To download CAD data / To get updated information, visit www.pascaleng.co.jp

95CGE- N22E□

Air expansion clamp

Doubleactingａｉｒ

Sensor nozzle detects faulty seating of workpiece

If clamping operation is made when metal chips are under the workpiece (Figure 1-a), or when the workpiece is set
1.2mm and over above the seating surface due to its distortion (Figure 1-b), the workpiece cannot sit fully on thesurface and air is exhausted from the sensor nozzle. Incomplete workpiece seating is detected.

Faulty setting ofworkpiece

Metal chips caught
by clamp

Seating surface
Metal chip
Workpiece set
ﬂoating1.2 mm
and over above
seating surface

Sensor nozzle

Air expansion clamp

Sensor nozzle

Figure 1-a

Figure 1-b

Faulty seating of workpiece

Seating completion of workpiece

Sensor air is exhausted from sensor nozzle.
Air sensor is not triggered and faulty
seating of workpiece is detected.

Sensor nozzle is blocked by the workpiece.
Air sensor detects the seating completionof workpiece.

CGE

Sensor nozzle

ExhaustClamping
air pressure

Clamping
air pressure

Unclamping
air pressure

96

Sensor nozzle

Unclamping
air pressure

Sensor air

Clamp condition

Sensor nozzle

Faulty seating ofworkpiece

Open

Air sensor signal

Air pressure switch

Air sensor OFF

Clamping
air pressure ON(Sensor air flows.)

Sensor air

CGE- N22E□

Air expansion clamp

ａｉｒ

DoubleactingIncomplete clamping sensor valve detects incomplete clamping
PAT. JP4297511
US8246029
EP2253419

When gripper fails to grip properly due to large draft angle of grip inner diameter (Figure 2-a), incomplete clamping
sensor valve is opened. Sensor air is exhausted and this detects incomplete clamping.
When clamping hole exceeds tolerance value (Figure 2-b), or when gripper is broken (Figure 2-c), incomplete clamping
is detected as well.
Clamping hole is large(Full stroke)

Slipping ofgripper

If gripper is broken

FullstrokeFigure 2-b

Figure 2-c

Incomplete clamping

Clamping completion

Incomplete clamping sensor valve is opened
by piston Ⓐ, sensor air is exhausted. Air
sensor is not triggered and this detects
incomplete clamping.

Incomplete clamping sensor valve remains
closed. Air sensor detects normal clamping
completion.

Incomplete clamping
sensor valve

Incomplete clamping
sensor valve
Piston Ⓐ

Piston Ⓐ

Clamping
air pressure

Exhaust(Air blow circuit)

Air expansion clamp

Figure 2-aFullstrokeCGE

Large draft angle ofgrip inner diameter

Clamping
air pressure

Unclamping
air pressure

Unclamping
air pressure

Sensor air

Clamp condition

Incomplete clamping
sensor valve

Incomplete
clamping

Open

Air sensor signal

Air pressure switch

Air sensor OFF

Clamping
air pressure ON(Sensor air flows.)

To download CAD data / To get updated information, visit www.pascaleng.co.jp

Sensor air

97

CGE- N22E□

Air expansion clamp

Doubleactingａｉｒ

Unclamping sensor valve detects unclamping operation is complete

Unclamping sensor valve enables sensor to detect unclamping completion. The valve opens to exhaust sensor air evenwhen the workpiece blocks the sensor nozzle.

Unclamping completion

Clamping completion

Unclamping sensor valve is opened by pistonⒷ and sensor air is exhausted. Air sensor is not
triggered and this detects unclamping
completion.

Unclamping sensor valve is closed byclamping air pressure. Air sensor detects
normal clamping completion.

Unclamping
sensor valve

Unclamping
sensor valve

CGE

Air expansion clamp

Sensor nozzle

Clamping
air pressure

Piston Ⓑ

Exhaust(Air blow circuit)98

Unclamping
air pressure

Unclamping
air pressure

Sensor air

Clamp condition

Unclamping sensor valve

Unclamping
completion

Open

Clamping
completion

Close

Air sensor signal

Air pressure switch

Air sensor OFF

Unclamping
air pressure ON(Sensor air flows.)

Air sensor ON(Sensor air does not flow.)

Clamping
air pressure ON

Sensor air

CGE- N22E□

Air expansion clamp

Unclamping completion

Doubleactingａｉｒ

Clamping completion

Sensor nozzle

Unclamping
sensor valve

Unclamping
sensor valve

Clamping
air pressure

Piston Ⓑ

Unclamping
air pressure

Sensor air

Unclamping
air pressure

Clamp condition

Sensor nozzle

Incomplete
clamping
sensor valve

Unclamping
sensor valve

Unclamping
completion

Close

Close

Open

Clamping
completion

Close

Close

Close

Air sensor signal

Air sensor OFF(Sensor air flows.)

Air sensor ON(Sensor air does not flow.)

Faulty seating of workpiece

Sensor air

Air pressure switch
Unclamping
air pressureON

Clamping
air pressureON

Air expansion clamp

Exhaust(Air blow circuit)

Incomplete clamping

CGE

Sensor nozzle

ExhaustIncomplete clamping
sensor valve
Piston Ⓐ

Clamping
air pressure

Clamping
air pressure

Unclamping
air pressure

Sensor air

Exhaust(Air blow circuit)

Clamp condition

Sensor nozzle

Incomplete
clamping
sensor valve

Unclamping
sensor valve

Faulty seating ofworkpiece

Open

Close

Incomplete
clamping

Close

Open

Unclamping
air pressure

Sensor air

Air sensor signal

Air pressure switch

Close

Air sensor OFF

Clamping
air pressure ON

Close

Air sensor OFF(Sensor air flows.)(Sensor air flows.)

Clamping
air pressure ON

To download CAD data / To get updated information, visit www.pascaleng.co.jp99CGE- N22E□

Air expansion clamp

ａｉｒ

DoubleactingNon-constant air blow model considerably reduces air consumption
PAT. JP5674191
US8800982
EP2543468

The newly developed non-constant air blow model has no open

2 Grippers, 3 Grippers

space between a scraper, a gripper and a rod thereby no air blow

Non-constant air blow model

during machining is required to prevent chips intrusion.

Open space where metal
chips can intrude is removed
during clamping.

The air blow model (See picture on the right), which requires constant air blow during machining, used to consume constantly 50 L/
min (0.3MPa) of air for 12mm of grip inner diameter, however, the4 Grippers (Old model)

new model requires air blow only when the clamp is in clamp andAir blow model

unclamp action, and when workpiece replacement.

Open space where metal
chips can intrude is createdduring clamping.

This enables significant reduction of air consumption, which helps
promote energy conservation.

Non-constant air blow model

Grip inner diameterø 7.0 7.3 7.6 7.9 8.2
2 Grippers

ø 8.5

9

10

Clamping force

0.81 kN(Air pressure 0.5MPa)

Model

CGE-N22E Grip inner diameter

CGE

Air expansion clamp

Number of grippers

Number of grippers

3 Grippers

100

Grip inner diameter

ø 11

12

13

Clamping force

0.81 kN(Air pressure 0.5MPa)

Model

CGE-N22E Grip inner diameterCGE- N22E□

Air expansion clamp

ａｉｒ

DoubleactingSpace where metal chips can intrude is created (Old model)

Rod

GripperSpace
Scraper

A

B

A
Rod
4 Grippers

Scraper
B

B-B

A-A

When clamping

Because of space between scraper, gripper and the rod, air blow must always be performed to prevent intrusion of chips.

Secure chip protection

B

Gripper

Scraper

Scraper

Air expansion clamp

Rod

Pages →102‒105
AA
Rod
2 Grippers
B

Scraper

B-B

A-A

CGE

When clamping

Because there is no space between scraper, gripper and the rod, it is not necessary to perform air blow during cutting process.

Rod

Scraper

Gripper

B
A

Scraper

B

Pages →106, 107ARod
3 Grippers
Scraper
When clamping

A-A

B-B

Because there is no space between scraper, gripper and the rod, it is not necessary to perform air blow during cutting process.

To download CAD data / To get updated information, visit www.pascaleng.co.jp101CGE- N22E□

Air expansion clamp

Non-constant air blow model

Doubleactingａｉｒ

Dimensions
Seating surface
outer diameter øU
Seating surface
inner diameter øT
E1

60°

45

A

55.6

E2

5
ø7
Sensor nozzle ø1

A

A-A

45

Details

66

Rod outer diameter
øF4
øAD
R0.6

30°

48

30°

4 (5°tapering)
67.5

R5

4-ø9.554-ø5.519.5

4.5

Grip inner diameter usage requirements

O-ring AS568-032
ø52.5

3- O-ring P4

Min. 4Air expansion clamp
Non-constant air blow model

Clamp removal thread
4-M6×1 thread through40±0.0050øS -0.1

12

2

4

8

Gripper outer diameterøF3-0.030Min. 8.5

CGEø53 f 7 -0.060

Blind hole

Clamping air port

28.5

28.5

mm

Blow air supply port
(Sensor air exhaust port)

Model

CGE-N22E□
076

079

082

E1

7.6

7.7

7.8

7.9

8.1

E2

3.8

3.8

3.8

3.9

4

ø F3

6.5

6.8

7.1

7.4

7.7

ø F4

6.55

6.85

7.15

7.45

7.75

øS

20.5

20.6

20.9

21.2

21.5

øT

10.6

10.9

11.2

11.5

11.8

● Material used for O-ring is fluorocarbon (Hardness Hs90).

øU

20

20.1

20.4

20.7

21

● Seating surface hardness is HRC55.

ø AD

5.4

5.7

6

6.3

6.6

14

14

073

14

070

Sensor air supply port

● Mounting screws are not included.

● The above diagram indicates unclamped condition.

102

Through hole

● CGE-N22E070, 073, 076, 079, 082 are made to order.

CGE- N22E□

Air expansion clamp

Non-constant air blow model

ａｉｒDoubleactingMounting details

28.5

28.5
Sensor air supply port

14

14

45

14

3-Max.ø2.5

Blow air supply port
(Sensor air exhaust port)

4-M5
Clamping air port

1
6.3

Rz

Min. 20

Rz6.3

Rz6.3

+0.0460

R0.4
Unclamping air portside face processing range

(ø3)
ø52.8

+0.2
0

Unclamping air port

Air expansion clamp
Non-constant air blow modelø53 H830°(H8 range)
Min.1045

CGE

Unclamping air portbottom face processing range
Rz: ISO4287(1997)：Unclamping air port must be made on either side or bottom face.

● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp103CGE- N22E□

Air expansion clamp

Non-constant air blow model

ａｉｒDoubleactingDimensions
Seating surface
outer diameter øU
Seating surface
inner diameter øT
E1

60
°

45

A

55.6

E2

5
ø7
Sensor nozzle ø1

A

A-A
45

Details

66

Rod outer diameter
øF4
øAD

R1

9

30°

49

5 (5°tapering)

68.5

30°

40±0.005

R5

4-ø9.554-ø5.519.5

4.5

Grip inner diameter usage requirements

O-ring AS568-032
ø52.5

3- O-ring P4-0.030Min. 9.5

CGEø53 f 7 -0.060

Min. 5Air expansion clamp
Non-constant air blow model

Clamp removal thread
4-M6×1 thread through120

øS -0.1

2

5

Gripper outer diameterøF3

Blind hole

Clamping air port

28.5

28.5

mm

Blow air supply port
(Sensor air exhaust port)

10

E1

8.5

8.5

9

E2

4.2

4.2

4.4

ø F3

8

8.5

9.5

ø F4

8.05

8.55

9.55

øS

22.5

22.5

23.5

øT

12.1

12.6

13.6

● Material used for O-ring is fluorocarbon (Hardness Hs90).

øU

22

22

23

● Seating surface hardness is HRC55.

ø AD

6.3

6.8

7.8

14

09

14

CGE-N22E□
085

14

Model

Sensor air supply port

● Mounting screws are not included.

● The above diagram indicates unclamped condition.

104

Through hole

● CGE-N22E085, 09, 10 are made to order.

CGE- N22E□

Air expansion clamp

Non-constant air blow model

ａｉｒDoubleactingMounting details

28.5

28.5
Sensor air supply port

14

14

45

14

3-Max.ø2.5

Clamping air port

4-M5

Blow air supply port
(Sensor air exhaust port)

1
6.3

Rz

Min. 20

Rz6.3

Rz6.3

+0.0460

R0.4
Unclamping air portside face processing range

(ø3)
ø52.8

+0.2
0

Unclamping air port

Air expansion clamp
Non-constant air blow modelø53 H830°(H8 range)
Min.1045

CGE

Unclamping air portbottom face processing range
Rz: ISO4287(1997)：Unclamping air port must be made on either side or bottom face.

● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp

105CGE- N22E□

Air expansion clamp

Non-constant air blow model

ａｉｒDoubleactingDimensions
Seating surface
outer diameter øU
Seating surface
inner diameter øT
E1

E2

5
ø7
Sensor nozzle ø1

60
°

45

55.6

A
A

A-A
45
66

Details
Rod outer diameter
øF4
øAD

R1

10

30°

5.6
2
50
69.5

40±0.005

30°

4-ø9.5

Gripper outer diameterøF35 (5°tapering)

5

4-ø5.519.5

4.5

Grip inner diameter usage requirements

O-ring AS568-032
ø52.5

3- O-ring P4-0.030Min. 10.5

CGEø53 f 7 -0.060

Min. 5.6

Air expansion clamp
Non-constant air blow model

Clamp removal thread
4-M6×1 thread through

R5

12

0

øS -0.1

Blind hole

Clamping air port

28.5

28.5

mm

Blow air supply port
(Sensor air exhaust port)

13

E1

9.4

9.9

10.3

E2

4.6

4.8

5.1

ø F3

10.5

11.5

12.5

ø F4

10.55

11.55

12.55

øS

24.5

25.5

26.5

øT

14.6

15.6

16.6

● Material used for O-ring is fluorocarbon (Hardness Hs90).

øU

24

25

26

● Seating surface hardness is HRC55.

ø AD

8.2

9.2

10.2

14

12

14

CGE-N22E□
11

14

Model

Sensor air supply port

● Mounting screws are not included.

● The above diagram indicates unclamped condition.

106

Through hole

● CGE-N22E11, 12, 13 are made to order.

CGE- N22E□

Air expansion clamp

Non-constant air blow model

ａｉｒDoubleactingMounting details

28.5

28.5
Sensor air supply port

14

14

45

14

3-Max.ø2.5

Blow air supply port
(Sensor air exhaust port)

4-M5

Clamping air port

1
6.3

Rz

Min. 20

Rz6.3

Rz6.3

+0.0460

R0.4
Unclamping air portside face processing range

(ø3)
ø52.8

+0.2
0

Unclamping air port

Air expansion clamp
Non-constant air blow modelø53 H830°(H8 range)
Min.1045

CGE

Unclamping air portbottom face processing range
Rz: ISO4287(1997)：Unclamping air port must be made on either side or bottom face.

● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp107CGE- N22E□

Air expansion clamp

ａｉｒ

DoubleactingGripper set replacement

Number of grippers

Gripper set model

Clamp model

CGE-N22EJ070

CGE-N22E070

CGE-N22EJ073

CGE-N22E073

CGE-N22EJ076

CGE-N22E076

CGE-N22EJ079

CGE-N22E079

CGE-N22EJ082

CGE-N22E082

CGE-N22EJ085

CGE-N22E085

CGE-N22EJ09

CGE-N22E09

CGE-N22EJ10

CGE-N22E10

CGE-N22EJ11

CGE-N22E11

CGE-N22EJ12

CGE-N22E12

CGE-N22EJ13

CGE-N22E13

Set description

Scraper × 1

Gripper(Refer to table left)

O-ring × 1

2 Grippers

It is recommended that grippers, scraper andO-ring be replaced after about 200,000 oper-

Air expansion clamp

ations. Replace grippers in sets and not just an
3 Grippers

individual gripper. (Refer to the table on theleft for the gripper set model.)CGE

Grip inner diameter & rod height when clamping

Rod height10

Rod height (mm)

9

ø1 1

8

‒ø1

3

ø8.5

7

‒ø1

0

Rod height calculation formula
ø7‒

ø8.

6

ø7

2

grip inner diameter and‒ ø8.2：6.58-2.84× Actual
nominal grip diameter difference

grip inner diameter andø8.5 ‒ ø10 ：7.82-2.35× Actual
nominal grip diameter difference
5
-0.3

-0.2

Allowable min.
grip inner diameter

-0.1

0

0.1

Nominalgrip inner diameter

0.2

0.3

0.4

0.5

ø7‒ø8.2
Allowable max.
grip inner diameter

0.6

Allowable max.
grip inner diameterDiﬀerence between actual grip inner diameterand nominal grip diameter (mm)

108

0.7

grip inner diameter andø11 ‒ ø13 ：8.82-2.35× Actual
nominal grip diameter difference

Example：When CGE-N22E10 (Nominal grip diameter : ø10)is clamping ø9.8 hole
Rod height = 7.82 - 2.35×(-0.2) = 8.29mm

CGE- N22E□

Air expansion clamp

ａｉｒ

Doubleacting

System configuration example

Workpiece positioning pin(Round) 2

Expansion clamp
model CGE

Workpiece
guide 1

Workpiece guide

Expansion clamp
model CGE

Workpiece positioning pin(Diamond) 2

1

Expansion clamp
model CGE

Workpiece positioning pin(Round) 2

Workpiece guide1

Air expansion clamp

model CGE

10mm and overExpansion clamp

Grip inner diameter D

Rod outer
diameter dExpansion clamp
model CGE

Workpiece positioning pin(Diamond) 2

CGE

Diametral space
D-d and under

Expansion clamp
model CGE

1: When using automatic or robotic conveyers, prevent damage to clamp caused from
impact by setting workpiece guides. Using the above guide as reference, accurately
position the holes when using workpiece guides.
2: The expansion clamp does not have a workpiece positioning function.
Install workpiece positioning pins (or similar).

To download CAD data / To get updated information, visit www.pascaleng.co.jp

109CGE- N22E□

Air expansion clamp

ａｉｒ

DoubleactingPneumatic circuit diagram

P.S. 1Ⓒ

Air sensor unit

(The circuit diagram is subject to change according to the model of sensor.)

5μm

5μm
Clamping
air pressure

Sensor air
0.2MPa(Recommended air pressure)

P.S. 2Ⓐ Solenoid valve
5μm

Unclamping
air pressureⒷ Speed controller

Air blow((Meter-out control)

Exhaustwhen OFF)

0.3MPa(Recommended air pressure)● Air blow will not be necessary during cutting process. Be sure to air blow upon loading and unloading workpiece
and when clamping and unclamping to remove metal chips and debris.
● The solenoid valve Ⓐ must be closed when checking the operation of the clamp with the air sensor. Also 3
exhausted and misclamp detection function is disabled.

Air blowing

Incomplete clamping

CGE

Air expansion clamp

port type of solenoid valve must be used in the circuit. If 2 port type of the valve is used, sensing air cannot be

Clamping
air pressure

Solenoid valve of

Solenoid valve ofⒶ air blow circuitⒶ air blow circuit

Unclamping
air pressure

Unclamping
air pressureON
Air blow

110

OFFExhaust(Sensor air)Sensor air

CGE- N22E□

Air expansion clamp

ａｉｒ

Doubleacting● Operation speed must be adjusted by a meter-out type speed controller Ⓑ being provided in the unclamping
circuit. By the adjustment, air flow in unclamping circuit is squeezed and back pressure is generated. The backpressure acts on the piston Ⓐ of the clamp and makes the gripper expand first then the taper rod strokes down
to clamp. If meter-in type speed controller is installed in the circuit, it dumps the air rapidly and makes the gripper move very quick which causes incomplete clamping.
● Adjust air flow when clamping to have the taper rod full stroke in 0.3 sec or over.
Excessive air flow to the clamp gives impact load and may cause breakage of the parts.

Clamping hole

Taper rod

Workpiece

Gripper

PistonⒶ

SleeveClamping air pressure

Air expansion clamp

PistonⒷ

Unclamping air pressure

CGE

Unclamping air pressure circuitⒷ Speed controller

Air sensor unit Ⓒ recommended condition of use

ISA3-F/G series
manufactured by SMC

Supplier andmodel

GPS2-05 , GPS3-E series
manufactured by CKD

Air supply
pressure

0.2 MPa

Inner diameterof pipingø4 mm (ISA3-F：ø2.5 mm)

Overall piping
length5 m or less

● Use a solenoid valve with needle for air sensor
unit Ⓒ and control it supplying air all the time inorder to eliminate intrusion of chips or coolant.
● There is a case that air sensing cannot be madesuccessfully as designed when it is used out of
the usage shown on the left. Contact Technicalservice center for more details.

To download CAD data / To get updated information, visit www.pascaleng.co.jp111CGE- N22E□

Air expansion clamp

ａｉｒ

DoubleactingOperation cycle
The clamp should be controlled with the cycle in the diagram shown below to detect the operation status exactly.

Workpiece

Stateloading

Clamping

Air blow

ClampingOFF

completion 1(Machining)

Air blowON

Unclamping

Air blow

Unclamping

Air blow

Workpiece

OFF

completion 2

ONunloading

Workpiece Clamp
clamp

UnclampON

4

Air blowOFFON
Sensor air
OFF5

Clamping air pressure
P.S. 1

OFF

ON

OFF

Unclamping air pressure
P.S. 2

ON

OFF

ON

ON or OFF 3

CGE

Air expansion clamp

Air sensor

112

1 : Clamping completion: P.S. 1＝ON

P.S. 2＝OFF

Air sensor＝ON

2 : Unclamping completion : P.S. 1＝OFF

P.S. 2＝ON

Air sensor＝OFF

3 : ON : Complete clamping

OFF : Incomplete clamping

4 : Solenoid valve control

5 : Air pressure switch, Air sensor signal

OFFCGE- N22E□

Air expansion clamp

ａｉｒ

DoubleactingCaution in use● Be sure to make inner diameter of air blow circuit 4 mm
and over except for clamp mounting surface.

● Perform unclamping completion detection, clamping completion detection and incomplete clamping detection withcombination actions of pressure switch and sensor shown● Set the workpiece in such a way that the clamping hole ofworkpiece is perpendicular to seating surface. Clamping inin table below. (Refer to the pneumatic circuit diagram on
page →110 for details.)

tilted condition results in uneven contact of gripper withhole, which leads to concentration of load that may cause

Applications

Pressureswitch 1(P.S. 1)Pressureswitch 2(P.S. 2)Air sensor

Unclamping
completion detection

OFF

ON

OFF

Clamping
completion detection

ON

OFF

ON

Incomplete
clamping detection

ON

OFF

OFF

damage.

● Verify that there are no metal chips or debris on seating
surface of clamping hole and clamp body before setting
workpiece. Allowing intrusion of metal chips results in insecure clamping, which can lead to low grade of machining
accuracy.

● Flaring (Biting) of gripper into workpiece varies depending
on workpiece material or thermal processing conditions.
With regards to conditions of workpiece and clamping hole,refer to page →91. Secure clamping is not possible when
Air expansion clamp

workpiece or clamping hole that does not satisfy these
conditions is used.

● If clamping hole serves as taper hole (cast draft hole withgradient), then perform test clamping using applicable
workpiece beforehand to verify that there are no problems

CGE

with operations.

● Deformation may occur if the thickness of clamping holesection of workpiece is extremely thin. Use applicable
workpiece to perform test clamping beforehand to verify
that there are no deformations in thin portion.

● Supply the dry and filtered air. Particulate size 5μm or lessis recommended.

● Measure seating surface flatness with air pressure appliedon clamping side, or by applying air pressure on neither
clamping nor unclamping side.

● Set detection range of air sensor to 0.05 mm and underfrom seating surface. Insert a feeler gauge between workpiece and seating surface to create detection distance inorder to perform setting accurately. Refer to instruction
manual of air sensor for details on setting methods.

To download CAD data / To get updated information, visit www.pascaleng.co.jp113

CGY- F22□□

Air expansion clamp Long neckａｉｒ

air Expansion clamp
Double acting 1 MPa

CGY

CGY
Long neckAir expansion clamp

model

model

114

CGY

Doubleacting

CGY- F22□□

Air expansion clamp Long neck

Doubleactingａｉｒ

Specifications
Grip inner diameter− ：Air blow model

CGY ー F22
E ： Non-constant
air blow model：Number of grippers

055

058

061

064

067 070A ： 2 Grippers

070

073

076

079

082

085

09

10

： 2 Grippers

11

12

13

： 3 Grippers： 2 Grippers

indicates made to order.

CGY-F22-

Size
Model

055 058 061 064 067 070A 070 073 076 079 082 085 09

11

2 Grippers

Number of grippers
Clamping force(air pressure 0.5MPa)
Radial expansion force(air pressure 0.5MPa)

kN
kN

2.52

Taper rod stroke

mm

4.0

Clamp stroke

mm
Clamp

Cylindercapacity

10

UnclampAllowable eccentricity

Recommended air blowpressure
Recommended sensor airpressure
Mass

0.81
2.81

2.52
4.8

1.2
7.2

8.7

3

8.1

9.7

mm

±0.3

±0.4

MPa

0.3

MPa

0.2
0.61

kg

Recommended tightening
torque of mounting screws 2

0.65

0.67

0.68

7

N･m

Aluminum, steel and others (HRC25 or below).

Workpiece material
Allowable min. grip innermm
diameterAllowable max. grip innermm
diameter
Grip inner diameter tapering angle(Draft angle)

13

3 Grippers

cm 3
cm

1

12

Cast iron are not usable.

5.2

5.5

5.8

6.1

6.4

6.7

6.7

7.0

7.3

7.6

7.9

8.2

8.7

9.7 10.7 11.7 12.7

5.8

6.1

6.4

6.7

7.0

7.3

7.4

7.7

8.0

8.3

8.6

9.2

9.7 10.7 11.7 12.7 13.7
Air expansion clamp

Grip inner diameter

CGY-F22E

3°or below
0.1 or below

Grip inner diameter circularity● Pressure range：0.3‒1 MPa (CGY-F22-055, 058, 061, 064, 067, 070A：0.3‒0.8 MPa)
● Proof pressure：1.5 MPa (CGY-F22-055, 058, 061, 064, 067, 070A：1.2 MPa)
● Please inquire if above terms are not applied.

● Operating temperature：0‒70 ℃

2：ISO R898 class 12.9
CGY
Long neck

1：By the eccentric mechanism, the expansion clamp does not have a workpiece positioning function.

● Fluid used：air

Clamping force & air pressure
1.8
1.6
CGY-F22

Clamping force (kN)

1.4

Air pressure

1.2

Clamping force
1.0

F=1.617×P

0.8

MPa 0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

kN 0.49 0.65 0.81 0.97 1.13 1.29 1.46 1.62

P：Air pressure (MPa)0.6● CGY-F22-055, 058, 061, 064, 067, 070A applicable air pressure shouldbe 0.3 to 0.8 MPa.

0.4
0.2
0
0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

Air pressure (MPa)To download CAD data / To get updated information, visit www.pascaleng.co.jp

115

CGY- F22□□

Air expansion clamp Long neckAir blow model
model

Non-constant air blow model

CGY-F22-

model

CGY-F22E

Air expansion clamp

Non-constant air blow model
model

CGY-F22E

2 Grippers

2 Grippers

3 Grippers

ø5.5 5.8 6.1 6.4 6.7 7.0

ø7.0 7.3 7.6 7.9 8.2

ø8.5 9 10

ø11 12 13

PAT.

Sensor air：IN

Air blow ：IN
Sensor air ：Exh.
(Non-constant air blow model)

Unclamping detection
Incomplete clamping detection

Clamping
air pressure
CGYLong neck

Doubleacting2 Grippers

Air blow ：OUT
Sensor air ：Exh.
(Air blow model)

Space-saving clamping

Air expansion clamp model CGY

116

ａｉｒ

Unclamping
air pressure

Outer diameter：15‒24 mm
Outer diameter varies depending
on clamping hole diameter.
Refer to pages →124, 126, 128, 130
for dimensions.

Linear length 30 mm

CGY- F22□□

Air expansion clamp Long neckａｉｒDoubleactingWorkpiece setting (Unclamping completion)① Pistons Ⓐ & Ⓑ, as well as taper rod and gripper are raised by unclamping air pressure.
② Workpiece unclamping is completed by the sensor air, clamping and unclamping air pressure.
③ Set the workpiece onto the seating surface.

Taper rod
Seating surface

Workpiece
Piston Ⓐ
Scraper

Gripper

Sensor air

SleeveUnclamping completion

Piston Ⓐ

Piston Ⓐ blocks air ﬂow channel
to shut air and triggers sensor.
Piston Ⓑ

Clamping
air pressure

Unclamping
air pressure

Clamp condition

Air sensor signal

Air pressure switch

Unclamping
completion

Air sensor ON(Sensor air does not flow.)

Unclamping
air pressure ON

Sensor air

Workpiece holding (Clamping completion)① Piston Ⓑ and taper rod are lowered by clamping air pressure after releasing unclamping air pressure.
Air expansion clamp② The gripper expands horizontally along the tapered surface to grip inner face of clamping hole.
③ The gripper securely grips the inner face of clamping hole and pulls the workpiece down firmly onto theseating surface.
④ Workpiece holding is completed by the sensor air, clamping and unclamping air pressure.

Clamping hole

Seating surface

Tapered surface
Workpiece

CGY
Long neck

Taper rod

SleeveAir blow model：Exhaust
Piston Ⓐ

Gripper

Sensor air
SleevePiston Ⓐ

Clamping completion
Sleeve pushes down piston Ⓐ, air
ﬂows and sensor is not triggered.

Piston Ⓑ
Non-constant air blow model：
Exhaust(Air blow circuit)

Clamping
air pressure

Unclamping
air pressure

Clamp condition

Air sensor signal

Air pressure switch

Clamping
completion

Air sensor OFF

Clamping
air pressure ON(Sensor air flows.)

Sensor air

To download CAD data / To get updated information, visit www.pascaleng.co.jp117

CGY- F22□□

Air expansion clamp Long neckａｉｒDoubleactingLarge gripper expansion stroke
The gripper expands horizontally 1.0mm( ), which enables the accommodation of dimensional variations in diecast
bore diameters and ensures workpiece is held securely.

Grip inner diameterø10

Taper rod diameter
ø9.55

Min. grip inner diameterø9.7

Max. grip inner diameterø10.7

Draft angle of grip inner diametermax. 3°each side

Example：model CGY-F22E10：0.6mm stroke for CGY-F22-055, 058, 061, 064, 067, 070A. 0.7mm stroke for CGY-F22E070, 073, 076, 079, 082.

Taper rod and gripper with superior durability① The holding force of expansion clamp is transmitted from tapered surface to gripper, making it possible for the gripper
to hold onto inner face of clamping hole and hold the workpiece on the seating surface for secure workpiece clamping.
② Special steel with superior abrasion resistance is used for gripper to improve durability.
③ Tip section of taper rod has larger diameter than gripper and is well
chamfered to be a better guide when setting the workpiece.
Clamping hole
① Tapered surface③ Taper rod tip section

Gripper

Air expansion clamp② Gripper

CGY
Long neckSeating surface can be reground (Max. 0.1 mm)① When seating surface is damaged, the flange section can be dismounted and reground.
② Flange can be easily dismounted and reassembled at production site.

① Seating surface② Flange118

CGY- F22□□

Air expansion clamp Long neckａｉｒDoubleactingClamping hole pitch errors can be tolerated

Taper rod and gripper slide radially and tolerate pitch
errors (±0.6 ‒0.8 mm).
Taper rod and gripper are pushed back towards thecenter by scraper when unclamping.

Taper rod

Gripper

Allowable eccentricity±0.3mm (Grip inner diameter 5.5‒7 mm)±0.4mm (Grip inner diameter 7‒13mm)：CGY-F22-070A

Scraper

Sliding

Clamping hole

Allowable eccentricity±0.3mm (Grip inner diameter 5.5‒7 mm)±0.4mm (Grip inner diameter 7‒13mm)：CGY-F22-070A

By the eccentric mechanism, the expansion clamp does not have a workpiece positioning function.

Air expansion clamp

Incorporating strong air blowing circuit
Air blow from a gap between the gripper and scraper clears off metal chips and coolant that stay on the seating
surface. Flushing channel is also provided on the seating surface to remove the metal chips and coolants smoothly
during workpiece setting.

FlushingchannelScraper
CGYLong neck

Gripper
Scraper

Seatingsurface

Unclamping
air pressure

To download CAD data / To get updated information, visit www.pascaleng.co.jp

Air blow119

CGY- F22□□

Air expansion clamp Long neckａｉｒDoubleactingDetects clamping hole diameter that is too large
When the inner diameter of clamping hole exceeds tolerance value, then gripper will fail to gain grip on workpieceeven when extended to maximum reach. Piston Ⓐ lowers until end of stroke as it is pushed down by piston Ⓑ andblocks sensor air, which triggers air sensor and detects incomplete clamping.

Large clamping hole diameter
Maximum gripper expansion diameter

Gripper

Seating surface

Taper rod

Seating surface

Air expansion clamp

Gripper

SleevePiston Ⓐ

SleeveSensor air
Piston Ⓐ

CGYLong neck

Incomplete clamping
Piston Ⓐ lowers until end of
stroke and blocks air, allowing
sensor to detect the pressure.

Piston Ⓑ

Clamping
air pressure

120

Unclamping
air pressure

Sensor air

Clamp condition

Air sensor signal

Air pressure switch

Incomplete
clamping

Air sensor ON(Sensor air does not flow.)

Clamping
air pressure ON

CGY- F22□□

Air expansion clamp Long neckａｉｒDoubleactingDetects deformation of workpiece and floating of workpiece
When workpiece has significant deformation or when it is set poorly with gap of 1.2 mm above seating surface,then even when the gripper lowers until end of stroke, the workpiece is not held on seating surface. At this time,
piston Ⓐ lowers until end of stroke as it is pushed down by sleeve and blocks sensor air, which triggers air sensor
and detects incomplete clamping.

Faulty setting of workpiece
Seating surface

Incomplete clamping

SleevePiston Ⓐ

Clamping
air pressure

Workpiece set ﬂoating
1.2 mm and over above
seating surface

Piston Ⓐ lowers until end of
stroke and blocks air, allowing
sensor to detect the pressure.

Unclamping
air pressure

Clamp condition

Air sensor signal

Air pressure switch

Incomplete
clamping

Air sensor ON(Sensor air does not flow.)

Clamping
air pressure ON

Sensor air

Detects incomplete gripping
When the inner diameter of clamping hole is slightly larger than allowable value, or when the draft angle of grip
Air expansion clamp

inner diameter is large and results in incomplete gripping by the gripper, piston Ⓐ lowers until end of stroke as
sleeve pushes it down and sensor air is blocked, which triggers air sensor and detects incomplete clamping.

Gripper
Slipping of gripper

Incomplete clamping

SleevePiston Ⓐ lowers until end of
stroke and blocks air, allowing
sensor to detect the pressure.

Piston Ⓐ

Clamping
air pressure

CGYLong neck

Large draft angle of grip inner diameter

Unclamping
air pressure

Sensor air

Clamp condition

Air sensor signal

Air pressure switch

Incomplete
clamping

Air sensor ON(Sensor air does not flow.)

Clamping
air pressure ON

To download CAD data / To get updated information, visit www.pascaleng.co.jp

121CGY- F22□□

Air expansion clamp Long neckａｉｒDoubleactingWith the development of the non-constant air blow expansion clamp, air consumption will be significantly decreased.
The traditional model ordinarily requires 50L/min (0.3MPa) flow rate (when grip inner diameter is ø12). The new model can reduce

Air blow model

Number of grippers

Grip inner diameterø 5.5 5.8 6.1
2 Grippers

Clamping force

0.81 kN

Model(Air pressure 0.5MPa)

CGY-F22- Grip inner diameter

Clamping force

Model

6.4 6.7 7.0

Non-constant air blow model

Number of grippers

Grip inner diameterø 7.0 7.3 7.6
7.9 8.2

CGY-F22E Grip inner diameter2 Grippers
ø 8.5

9

10

0.81 kN(Air pressure 0.5MPa)

CGY-F22E Grip inner diameter

CGY
Long neckAir expansion clamp

0.81 kN(Air pressure 0.5MPa)

122

Number of grippers

Grip inner diameter

Clamping force

3 Grippers

ø 11 12 13(Air pressure 0.5MPa)0.81 kN

Model

CGY-F22E Grip inner diameter

CGY- F22□□

Air expansion clamp Long neckａｉｒDoubleactingair consumption and help promote energy conservation. However air blow at time of workpiece replacement is a must.

Space where metal chips can intrude is createdScraper

Gripper

Rod

Space
A

A

Pages →124, 125
B

ScraperB

Rod

When clamping

2 Grippers

A-A

B-B

Because of space between scraper, gripper and the rod, air blow must always be performed to prevent intrusion of chips.

Secure chip protection

Rod

Gripper

A

A

B

Scraper

Scraper

ScraperRod

Air expansion clamp

Pages →126‒129
2 Grippers
B

When clamping

A-A

B-B

CGY
Long neck

Because there is no space between scraper, gripper and the rod, it is not necessary to perform air blow during cutting process.

Rod

GripperA

A

Scraper
When clamping

Scraper

Scraper

B

B

Pages →130, 131Rod

3 Grippers

A-A

B-B

Because there is no space between scraper, gripper and the rod, it is not necessary to perform air blow during cutting process.

To download CAD data / To get updated information, visit www.pascaleng.co.jp

123CGY- F22- □Air expansion clamp Long neckAir blow model

Doubleactingａｉｒ

Dimensions
Seating surface
outer diameter øU

5Seating surface
inner diameter øT

A

60°

45

A

55.6

ø7

A-A
45
66

Details
Rod outer diameter
Gripper outer diameter
øR
øAD

4

7.5

57.5

4.5

10°

R0.6

2

R5

4-ø9.5
Clamp removal thread
4-M6×1 thread through770

øS -0.05

50 ±0.005

30

30°

5

19.5

AA (5°tapering)4-ø5.5O-ring AS568-032

Grip inner diameter usage requirements

3-O-ring P4

ø52.5-0.030Min. 4

Min. 828.5

28.5

Clamping air port

Blind hole

Blow air supply port

Through hole

14

mm

14

14

CGY
Long neckAir expansion clamp
Air blow modelø53 f 7 -0.060

Sensor air supply port

● Mounting screws are not included.

Model

CGY-F22-□
055

058

061

064

067

070A

øR

5

5.3

5.6

5.9

6.2

6.5

øS

15

15

15

15

15

15.5

øT

7.8

8.1

8.4

8.7

9

9.3

U

11

11.6

12.2

12.8

13

13.5

AA

2.5

2.5

3

3

3

3

ø AD

3.8

4.1

4.4

4.7

5.0

5.3

● Material used for O-ring is fluorocarbon (Hardness Hs90).
● Seating surface hardness is HRC55.
● The above diagram indicates unclamped condition.

124● CGY-F22-055,058,061,064,067,070A are made to order.

CGY- F22- □Air expansion clamp Long neckAir blow model

ａｉｒDoubleactingMounting details

28.5

28.5
Sensor air supply port

14

14

45

14

3 -Max. ø2.5

Blow air supply port
Clamping air port

ø53 H8

30°

1
6.3

Rz

Min.20

Rz6.3

Rz6.3

+0.0460(H8 range)
Min.104 - M545

R0.4

Unclamping air portside face processing range

(ø3)
+0.2

Unclamping air port

Unclamping air portbottom face processing range
Rz: ISO4287(1997)

CGY
Long neck：Unclamping air port must be made on either side or bottom face.

Air expansion clamp
Air blow model

ø52.8 0● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp

125CGY- F22E□

Air expansion clamp Long neck Non-constant air blow model

Doubleactingａｉｒ

Dimensions
Seating surface
outer diameter øU

5Seating surface
inner diameter øT

A

60°

45

A

55.6

ø7

A-A
45
66

Details
Rod outer diameter
øF4
øAD

30°

2

58

4

8

Gripper outer diameter
øF3

77.5

R5

4-ø9.5

10°

Clamp removal thread
4-M6×1 thread through50 ±0.005300øS -0.1

R0.6

5

4-ø5.519.5

4.5

4 (5°tapering)O-ring AS568-032

Grip inner diameter usage requirements

3-O-ring P4

ø52.5-0.030Min. 4

Min. 8.5
28.5

28.5

Clamping air port

Blind hole

Blow air supply port
(Sensor air exhaust port)

Through hole

14

mm

14

14

CGY
Long neckAir expansion clamp
Non-constant air blow modelø53 f 7 -0.060

Sensor air supply port

● Mounting screws are not included.

Model

CGY-F22E□
070

073

076

079

082

ø F3

6.5

6.8

7.1

7.4

7.7

ø F4

6.55

6.85

7.15

7.45

7.75

øS

18

18.3

18.6

18.8

18.8

øT

10.6

10.9

11.2

11.5

11.8

øU

16

16.3

16.6

16.9

17.2

ø AD

5.4

5.7

6

6.3

6.6

● Material used for O-ring is fluorocarbon (Hardness Hs90).
● Seating surface hardness is HRC55.
● The above diagram indicates unclamped condition.

126● CGY-F22E070,073,076,079,082 are made to order.

CGY- F22E□

Air expansion clamp Long neck Non-constant air blow model

ａｉｒDoubleactingMounting details

28.5

28.5
Sensor air supply port

14

14

45

14

3 - Max. ø2.5

Blow air supply port
(Sensor air exhaust port)

Clamping air port
45

1
6.3

Rz

Min.20

Rz6.3

Rz6.3

+0.0460(H8 range)
Min.10ø53 H830°

4 - M5R0.4

Unclamping air portside face processing range

(ø3)
+0.2

Unclamping air port

Unclamping air portbottom face processing range
Rz: ISO4287(1997)

CGY
Long neck：Unclamping air port must be made on either side or bottom face.

Air expansion clamp
Non-constant air blow model

ø52.8 0● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp127

CGY- F22E□

Air expansion clamp Long neck Non-constant air blow model

ａｉｒDoubleactingDimensions
Seating surface
outer diameter øU

75

ø

A

60°

45

A

55.6

Seating surface
inner diameter øT

A-A
45
66

Details
Rod outer diameter
øF4
øAD

30°

R1

59
78.5
19.5

5 (5°tapering)

4.5

10°

50 ±0.005

R5

4-ø9.55300

øS -0.1
Clamp removal thread
4-M6×1 thread through

2

5

9

Gripper outer diameterøF34-ø5.5

Grip inner diameter usage requirements

O-ring AS568-032

Min. 9.5-0.030
ø53 f 7 -0.060

Blind hole
28.5

28.5

Clamping air port

Through hole

Blow air supply port
(Sensor air exhaust port)

mm
Model

CGY-F22E□
085

09

10

ø F3

8

8.5

9.5

ø F4

8.05

8.55

9.55

øS

19.5

20

21

øT

12.1

12.6

13.6

øU

17.5

18

19

ø AD

6.3

6.8

7.8

14
14

14

Air expansion clamp
Non-constant air blow model
CGYLong neck

Min. 5

3-O-ring P4

ø52.5

Sensor air supply port

● Mounting screws are not included.
● Material used for O-ring is fluorocarbon (Hardness Hs90).
● Seating surface hardness is HRC55.
● The above diagram indicates unclamped condition.

128● CGY-F22E085 is made to order.

CGY- F22E□

Air expansion clamp Long neck Non-constant air blow model

ａｉｒDoubleactingMounting details

28.5

28.5
Sensor air supply port

14

14

45

14

3 - Max. ø2.5

Blow air supply port
(Sensor air exhaust port)

Clamping air port
45

1
6.3

Rz

Min.20

Rz6.3

Rz6.3

+0.0460(H8 range)
Min.10ø53 H8

30°

4 -M5

R0

.4
Unclamping air portside face processing range

(ø3)
+0.2

Unclamping air port

Unclamping air portbottom face processing range
Rz: ISO4287(1997)

CGY
Long neck：Unclamping air port must be made on either side or bottom face.

Air expansion clamp
Non-constant air blow model

ø52.8 0● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp

129CGY- F22E□

Air expansion clamp Long neck Non-constant air blow model

Doubleactingａｉｒ

Dimensions
Seating surface
outer diameter øU

75

Seating surface
inner diameter øT

A

60°

45

A

55.6

ø

A-A
45
66

Details
Rod outer diameter
øF4
øAD

R5

10°

4-ø9.5

5.6

60

2Gripper outer diameterøF35 (5°tapering)

5

4-ø5.519.5

4.5

Clamp removal thread
4-M6×1 thread through

R1

79.5

0
øS -0.1

50 ±0.005

30

10

30°

Grip inner diameter usage requirements

Blind hole

28.5

28.5

Clamping air port

Through hole

Blow air supply port
(Sensor air exhaust port)

mm
Model

CGY-F22E□
11

12

13

ø F3

10.5

11.5

12.5

ø F4

10.55

11.55

12.55

øS

22

23

24

øT

14.6

15.6

16.6

øU

20

21

22

ø AD

8.2

9.2

10.2

14
14

14

Air expansion clamp
Non-constant air blow model
CGYLong neck-0.030
ø53 f 7 -0.060

Min. 10.5

3-O-ring P4

ø52.5

Min. 5.6

O-ring AS568-032

Sensor air supply port

● Mounting screws are not included.
● Material used for O-ring is fluorocarbon (Hardness Hs90).
● Seating surface hardness is HRC55.
● The above diagram indicates unclamped condition.

130● CGY-F22E11, 12, 13 are made to order.

CGY- F22E□

Air expansion clamp Long neck Non-constant air blow model

ａｉｒDoubleactingMounting details

28.5

28.5
Sensor air supply port

14

14

45

14

3 -Max. ø2.5

Blow air supply port
(Sensor air exhaust port)

Clamping air port
45

1
6.3

Rz

Min.20

Rz6.3

Rz6.3

+0.0460(H8 range)
Min.10ø53 H8

30°

4 -M5

R0

.4

Unclamping air portside face processing range

(ø3)
+0.2

Unclamping air port

Unclamping air portbottom face processing range
Rz: ISO4287(1997)

CGY
Long neck：Unclamping air port must be made on either side or bottom face.

Air expansion clamp
Non-constant air blow model

ø52.8 0● Apply an appropriate amount of grease to the chamfer and the bore when mounting.
Excessive grease may be a blockage in the air passage, causing malfunction of the sensor.
● The 30°taper machining must be provided to avoid the damage of the O-ring.

To download CAD data / To get updated information, visit www.pascaleng.co.jp131CGY- F22□□

Air expansion clamp Long neckａｉｒDoubleactingGripper set replacement

Number of grippers

Gripper set model

Clamp model

CGY-F22-J055

CGY-F22-055

CGY-F22-J058

CGY-F22-058

CGY-F22-J061

CGY-F22-061

CGY-F22-J064

CGY-F22-064

CGY-F22-J067

CGY-F22-067

CGY-F22-J070A

CGY-F22-070A

CGY-F22EJ070

CGY-F22E070

CGY-F22EJ073

CGY-F22E073

CGY-F22EJ076

CGY-F22E076

CGY-F22EJ079

CGY-F22E079

CGY-F22EJ082

CGY-F22E082

CGY-F22EJ085

CGY-F22E085

CGY-F22EJ09

CGY-F22E09

CGY-F22EJ10CGY-F22E10

CGY-F22EJ11CGY-F22E11

CGY-F22EJ12CGY-F22E12

CGY-F22EJ13

CGY-F22E13

Set description

Scraper × 1

Gripper(Refer to table left)

O-ring × 1
CGY-F22-J055‒J070A
are not included.

2 Grippers

It is recommended that grippers, scraper andindividual gripper. (Refer to the table on theleft for the gripper set model.)Rod height

10

9

ø1 1

8

‒ø1

3

ø8.5

‒ø1

7

Rod height calculation formula0

grip inner diameter andø5.5 ‒ ø7 ：6.32-2.35× Actual
nominal grip diameter difference
6

‒ø7

5
-0.3

-0.2

Allowable min.
grip inner diameter

-0.1

0

0.1

Nominalgrip inner diameter

0.2

0.3

grip inner diameter andø7 ‒ ø8.2：6.58-2.84× Actual
nominal grip diameter difference

ø7‒

ø5.5

ø8.2

grip inner diameter andø8.5 ‒ ø10 ：7.82-2.35× Actual
nominal grip diameter difference

(070

0.4

A)

0.5

0.6

0.7

ø5.5‒ø7(070A) ø7‒ø8.2
Allowable max.
Allowable max. Allowable max.
grip inner diameter
grip inner diameter grip inner diameterDiﬀerence between actual grip inner diameterand nominal grip diameter (mm)132

ations. Replace grippers in sets and not just an

Grip inner diameter & rod height when clamping

Rod height (mm)CGYLong neckAir expansion clamp

3 Grippers

O-ring be replaced after about 200,000 oper-

grip inner diameter andø11 ‒ ø13 ：8.82-2.35× Actual
nominal grip diameter difference：CGY-F22-070A
Example：When CGY-F22E10 (Nominal grip diameter : ø10)is clamping ø9.8 hole
Rod height = 7.82 - 2.35×(-0.2) = 8.29mm

CGY- F22□□

Air expansion clamp Long neckａｉｒDoubleacting

System configuration example

model CGY

Workpiece positioning pin（Round）2

Expansion clamp
model CGY

Workpiece
guide 1

Expansion clamp
model CGY

Workpiece guide 1

Expansion clamp

Workpiece positioning pin（Diamond）2model CGY

Workpiece positioning pin（Round）2

Workpiece guide

1

10mm and overExpansion clamp

Grip inner diameter D

Rod outer
diameter dExpansion clamp
model CGY

CGYLong neck

Expansion clamp Workpiece positioning pin
model CGY
（Diamond）2

Air expansion clamp

Diametral space
D-d and under

1: When using automatic or robotic conveyers, prevent damage to clamp caused from
impact by setting workpiece guides. Using the above guide as reference, accurately
position the holes when using workpiece guides.
2: The expansion clamp does not have a workpiece positioning function.
Install workpiece positioning pins (or similar).

To download CAD data / To get updated information, visit www.pascaleng.co.jp133

CGY- F22□□

Air expansion clamp Long neckａｉｒDoubleactingAir blow model pneumatic circuit diagram

P.S. 1

0.3MPa(Recommended
air pressure)

5μm
Clamping
air pressure

Air blow

P.S. 25μm

0.1MPa(Recommended
air pressure)Ⓒ

Air sensor unit

(The circuit diagram is subject to change according to the model of sensor.)

5μm
Unclamping
air pressureⒷ Speed controller

Sensor air
0.2MPa(Recommended air pressure)(Meter-out control)● Be sure to air blow upon loading and unloading workpiece and when clamping and unclamping. During cutting,
if chips adhere to the gripper such as when going through the clamping hole, continue air blowing during
processing as well.
● Air blow pressure must be set to 0.1MPa when checking the operation of the clamp with the air sensor.

Air expansion clamp

Air blowing

Clamping

Air blow

CGYLong neckAir blowSensor air
ExhaustClamping
air pressure

Air blow

134

Unclamping
air pressure

Sensor air

Air blow

Unclamping
air pressure

Sensor air

CGY- F22□□

Air expansion clamp Long neckａｉｒDoubleactingNon-constant air blow model pneumatic circuit diagramⒶ Solenoid valve

P.S. 1

0.3MPa(Recommended air pressure)

5μm

5μm
Clamping
air pressure

Air blow(

P.S. 2

Exhaustwhen OFFⒸ)

Air sensor unit

(The circuit diagram is subject to change according to the model of sensor.)

5μm
Unclamping
air pressureⒷ Speed controller

Sensor air
0.2MPa(Recommended air pressure)(Meter-out control)● Air blow will not be necessary during cutting process. Be sure to air blow upon loading and unloading workpiece
and when clamping and unclamping to remove metal chips and debris.
● The solenoid valve Ⓐ must be closed when checking the operation of the clamp with the air sensor. Also 3
port type of solenoid valve must be used in the circuit. If 2 port type of the valve is used, sensing air cannot be
exhausted and clamp detection function is disabled.

Clamping

Air expansion clamp

Air blowing

CGY
Long neckAir blow

Clamping
air pressure

Solenoid valve of

Solenoid valve ofⒶ air blow circuitⒶ air blow circuit
Unclamping
air pressureON
Air blowSensor air

Unclamping
air pressure

Sensor air

OFFExhaust(Sensor air)

To download CAD data / To get updated information, visit www.pascaleng.co.jp

135

CGY- F22□□

Air expansion clamp Long neckａｉｒDoubleacting● Operation speed must be adjusted by a meter-out type speed controller Ⓑ being provided in the unclamping
circuit. By the adjustment, air flow in unclamping circuit is squeezed and back pressure is generated. The backpressure acts on the piston Ⓐ of the clamp and makes the gripper expand first then the taper rod strokes down
to clamp. If meter-in type speed controller is installed in the circuit, it dumps the air rapidly and makes the gripper move very quick which causes incomplete clamping.
● Adjust air flow when clamping to have the taper rod full stroke in 0.3 sec or over.
Excessive air flow to the clamp gives impact load and may cause breakage of the parts.

Clamping hole

Taper rod

Workpiece
Gripper
SleevePistonⒶ

PistonⒷ

Clamping air pressure

Unclamping air pressure

Air expansion clamp

Unclamping air pressure circuitⒷ Speed controller

CGY
Long neckAir sensor unit Ⓒ recommended condition of use

ISA3-F/G series
Supplier andmodel

Air supply
pressure

136

manufactured by SMC

GPS2-05 , GPS3-E series
manufactured by CKD
0.2 MPa

Inner diameterof pipingø4 mm (ISA3-F：ø2.5 mm)

Overall piping
length5 m or less

● Use a solenoid valve with needle for air sensor
unit Ⓒ and control it supplying air all the time inorder to eliminate intrusion of chips or coolant.
● There is a case that air sensing cannot be madesuccessfully as designed when it is used out of
the usage shown on the left. Contact Technicalservice center for more details.

CGY- F22□□

Air expansion clamp Long neckａｉｒDoubleactingOperation cycle
The clamp should be controlled with the cycle in the diagram shown below to detect the operation status exactly.

Case of air blow model
Workpiece

Stateloading

Clamping

Air blow

Clamping

switching completion 1(Machining)

Air blowswitching

Unclamping

Air blow

Workpiece

switching completion 2 switching

Air blow

Unclamping

unloading

Workpiece Clamp
clamp
Unclamp0.3MPa4

Air blow
0.1MPaON
Sensor air
OFF5

Clamping air pressure
P.S. 1

OFF

ON

OFF

Unclamping air pressure
P.S. 2

ON

OFF

ON

OFF or ON 3

Air sensor

1 : Clamping completion: P.S. 1＝ON

P.S. 2＝OFF

Air sensor＝OFF

2 : Unclamping completion : P.S. 1＝OFF

P.S. 2＝ON

Air sensor＝ON

3 : OFF : Complete clamping
4 : Solenoid valve control

ON

ON : Incomplete clamping
5 : Air pressure switch, Air sensor signal

Workpiece

Stateloading

Clamping

Air blow

ClampingOFF

completion 1(Machining)

Air blowON

Unclamping

Air blow

Unclamping

Air blow

Workpiece

OFF

completion 2

ONunloadingAir expansion clamp

Case of non-constant air blow model

Workpiece Clamp
clamp
UnclampON
Air blow

CGYLong neck

4

OFF
ON
Sensor air
OFF5

Clamping air pressure
P.S. 1

OFF

ON

OFF

Unclamping air pressure
P.S. 2

ON

OFF

ON

OFF or ON 3

Air sensor

1 : Clamping completion: P.S. 1＝ON

P.S. 2＝OFF

Air sensor＝OFF

2 : Unclamping completion : P.S. 1＝OFF

P.S. 2＝ON

Air sensor＝ONON

3 : OFF : Complete clamping ON : Incomplete clamping
4 : Solenoid valve control
5 : Air pressure switch, Air sensor signal

To download CAD data / To get updated information, visit www.pascaleng.co.jp

137CGY- F22□□

Air expansion clamp Long neckａｉｒDoubleactingCaution in use● Be sure to make inner diameter of air blow circuit 4 mm
and over except for clamp mounting surface.

● Perform unclamping completion detection, clamping completion detection and incomplete clamping detection withcombination actions of pressure switch and sensor shownin table below. (Refer to the pneumatic circuit diagram on● Set the workpiece in such a way that the clamping hole ofpage →134, 135 for details.)

workpiece is perpendicular to seating surface. Clamping intilted condition results in uneven contact of gripper withhole, which leads to concentration of load that may cause
damage.

● Verify that there are no metal chips or debris on seating
surface of clamping hole and clamp body before setting
workpiece. Allowing intrusion of metal chips results in insecure clamping, which can lead to low grade of machining
accuracy.

● Flaring (Biting) of gripper into workpiece varies depending
on workpiece material or thermal processing conditions.
With regards to conditions of workpiece and clamping hole,refer to page →115. Secure clamping is not possible when
workpiece or clamping hole that does not satisfy these
conditions is used.

● If clamping hole serves as taper hole (cast draft hole withAir expansion clamp

gradient), then perform test clamping using applicable
workpiece beforehand to verify that there are no problems
with operations.

● Deformation may occur if the thickness of clamping hole

CGYLong necksection of workpiece is extremely thin. Use applicable
workpiece to perform test clamping beforehand to verify
that there are no deformations in thin portion.

● Supply the dry and filtered air. Particulate size 5μm or lessis recommended.

● Measure seating surface flatness with air pressure appliedon clamping side, or by applying air pressure on neither
clamping nor unclamping side.

138

Applications

Pressureswitch 1(P.S. 1)Pressureswitch 2(P.S. 2)Air sensor

Unclamping
completion detection

OFF

ON

ON

Clamping
completion detection

ON

OFF

OFF

Incomplete
clamping detection

ON

OFF

ON

139

140