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