Expansion clamp

model

CGS-N1
Single acting

7MPaw w w. p a s c a l e n g . c o . j p

CGS- N1□□□

Expansion clamp

Air blow model
model

7MPa

Non-constant air blow model

CGS-N11-model

SingleactingNon-constant air blow model

CGS-N12E

model

CGS-N13E

4 Grippers

2 Grippers

3 Grippers

3 Grippers

ø6 7 8

ø9 10

ø11 12 13

ø12 13 14 15 16

Sensor nozzle

Incomplete clamping
sensor valve

Sensor air：IN
Workpiece seating detection
Incomplete clamping detection

Clamping hydraulic pressure

Air blow：IN
Incomplete clamping detection：Exh.

Superior tool accessibility

Short tool

Dramatically improved ﬂatness & roughness

Non-distorted clamping at bottom of workpiece

Simple piping

Bore depth
Min. 32.5 mm

Expansion clamp model CGS-N1

Short lift stroke
1Compact & simple jig

Thinner jig plateCGS- N1□□□

エクスパンション
Expansion clamp
クランプ

7MPa
7MPa

DoubleSingleactingactingWorkpiece setting (Unclamping completion)① Pistons Ⓐ & Ⓑ, as well as taper rod and gripper are raised by return spring.
② Set the workpiece onto the seating surface.

Taper rod

Gripper

Seating surface

PistonⒶ
Clamping
hydraulicpressure

PistonⒷ

Return spring

Workpiece holding (Clamping completion)① Piston Ⓑ and taper rod lower with piston Ⓐ being held at upper stroke end position by clamping
hydraulic pressure.
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 Ⓐ.
③ The gripper securely grips the inner face of clamping hole and pulls the workpiece down firmly onto theseating surface.
Taper rod

Clamping hole

GripperTapered surface

Seating surface

PistonⒶ

PistonⒷ

Clamping
hydraulicpressure2

CGS- N1□□□

Expansion clamp

7MPa

SingleactingLarge gripper expansion stroke

The gripper expands horizontally 1.0 mm, 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 CGS-N12E10Taper rod and gripper with superior durability① The holding force of expansion clamp is transmitted from tapered surface to gripper, making it possible for thegripper to hold onto inner diameter of workpiece 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 theworkpiece.

① Tapered surface

Clamping hole

③ 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 surface

3② FlangeCGS- N1□□□

エクスパンション
Expansion clamp
クランプ

7MPa
7MPa

DoubleSingleactingactingClamping 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
the center by O-ring when unclamping.

Taper rod

Allowable eccentricity±0.5mmAllowable eccentricity±0.5mmClamping hole

Gripper

SlidingO-ringIncorporating 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.
Manifold-type and piping method can be chosen for air-blow circuitry.

GripperFlushingchannelScraper

Scraper
Seatingsurface

Air blow
M5×0.8Air blow(Piping diametershould be morethan ø4mm)

4CGS- N1□□□

Expansion clamp

7MPa

SingleactingJig design and production made easy with cartridge piping.
PAT. JP5885822

For model CGS-N1, the outlet for the seating detection

For workpiece's base rib to plug seating detection air

air is blocked during clamping. This triggers the air sensor

outlet, clamp can be mounted diagonally to detect

and workpiece setting is detected. (See explanation on

workpiece seating. (Figure 1-b) For the single-acing→ page 9). When workpiece's seating surface is

CGS-N1, cartridge piping is used. Thus, the layout of thesmall, the outlet for seating detection air may not be

piping hole will not change and the clamp body can beblocked and seating can not be detected (Figure 1-a).

mounted at any angle.

model

CGS-N1

Workpiece seating
surface (base rib)

model

CGS-N1

Clamp seating surface

A
Piping hole

Piping hole

Seating detection
air outlet

Seating detection
air outlet

View A
Workpiece

Rib

Workpiece

Seating detection
air outlet

Seating
detection air

Seating
detection air

Clamping
hydraulicpressure

Clamping
hydraulicpressure

Air blow

Figure 1-a

Figure 1-b

Air blow

For the cartridge-type CGS-N1 model, hydraulic/air piping can be connected by any position or angle. Thus, there is agreater degree of freedom of piping layout, and jig production and design is made easy.

Piping connection from clamp
center to outside location
Piping connection to
clamp center location

model CGS-N1

5

CGS- N1□□□

エクスパンション
Expansion clamp
クランプ

7MPa
7MPa

DoubleSingleactingacting

For the double-action gasket piping expansion clamp ── model CGS-N2, the piping connection port location will differ
depending on the clamp mounting angle. Thus, piping hole layout becomes complicated and jig production and design
will be difficult. (Figure 2-b)

model

CGS-N2

Workpiece seating
surface (base rib)

model

CGS-N2

Clamp seating surface
Piping hole

Piping holeA

Piping hole
着座確認エア吹出口
Seating detection
air outlet

Seating detection
air outlet
Piping hole

View A
Workpiece

Workpiece

Rib

Seating detection
air outlet

Seating
detection air

Seating
detection air
Air blow

Air blow
Clamping
hydraulicpressure

Figure 2-a

Unclamping
hydraulicpressure

Clamping
hydraulicpressure

Figure 2-b

Unclamping
hydraulicpressure

6

CGS- N1□□□

Expansion clamp

7MPa

SingleactingGreater degree of freedom of piping layout - 1

To prevent damage to the O-ring caused by the burr of the hydraulic/air piping clamp mounting hole penetration area,
the seal face in the inner perimeter of the clamp mounting hole (where the O-ring is contacted), becomes smaller andsmaller toward the bottom. Even if it is difficult to remove burr when the piping passes through from the center of theclamp mounting hole to an outside location, the O-ring can still be protected from damage.

Hydraulic/air piping
Pass through to outside
location from center ofclamp mounting hole.

O-ringClamp mounting
holeBurr removal

Clearance 0.5mm

Seating
detection air

Clearance 0.5mm

Clamping
hydraulicpressure

Sealing surface

Air blow

Greater degree of freedom of piping layout - 2
The mounting screw hole can impede the seating detection air piping hole without any problem. The mounting screw
creates a seal and will not allow seating detection air to leak.

Mounting screw
Seating detection
air piping

Mounting screw hole

Interference

7

Seating
detection air

CGS- N1□□□

エクスパンション
Expansion clamp
クランプ

7MPa
7MPa

DoubleSingleactingactingMounting hole processing made easy

If processing specifications shown on Figure 3-a is difficult, process using specifications shown on Figure 3-b (see redline).

A-part details
A

3 0°

3 0°
0.3 and over

(0.5)

Figure 3-a(0.5)

Figure 3-b

8

CGS- N1□□□

Expansion clamp

Singleacting

7MPa

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, the workpiece cannot sit fully on the surface and air is
exhausted from the sensor nozzle. Incomplete workpiece seating is detected.

ワークのFaultysetting of
セッティング不良
workpiece

Metal
キリコをはさんでchips caught
クランプ動作by clamp

Metal chip
Seating surface
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

Exhaust9

Sensor air

Sensor air

Clamping
hydraulicpressure

Clamping
hydraulicpressure

Clamp condition

Sensor nozzle

Air sensor signal

Hydraulic pressure switch

Faulty seatingof workpieceOpen

Air sensor OFF

Clamping
hydraulic ON
pressure(Sensor air ﬂows.)

CGS- N1□□□

エクスパンション
Expansion clamp
クランプ

7MPa
7MPa

DoubleSingleactingactingIncomplete 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, incomplete clamping sensor valve is
opened. Sensor air is exhausted and this detects incomplete clamping.

Large
draft angle of
グリップ内径のテーパ角度が大きい
grip inner diameter

Slipping ofgripper

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

Gripper

Incomplete clamping
sensor valve

Air blow model: Exhaust

Piston Ⓐ

Sensor air

Sensor air

Clamping
hydraulicpressure

Clamping
hydraulicpressure

Non-constant air blow model : Exhaust

Clamp condition

Incomplete clamping
sensor valve

Incomplete
clamping

Open

Air sensor signal

Hydraulic pressure switch

Air sensor OFF

Clamping
hydraulic ON
pressure(Sensor air ﬂows.)

10

CGS- N1□□□

Expansion clamp

7MPa

SingleactingWith 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

Air blow model

Number of grippers

Grip inner diameter

Clamping force

0.86 kNø6（Hydraulic pressure 4 MPa）

Model

CGS-N11-06

4 Grippers
ø7

1.66 kN

8（Hydraulic pressure 7 MPa）

CGS-N11- Grip inner diameter

Non-constant air blow model

Number of grippers

Grip inner diameter2 Grippers

ø9

Clamping force

2.73 kN

10（Hydraulic pressure 7 MPa）

Model

CGS-N12E Grip inner diameter： It comprises the same output force cylinder with CGS-N12E grip inner diameter ø11 to ø13.

Grip inner diameter

Number of grippers

Clamping force

2.73 kN

Model

ø 11

12

13

（Hydraulic pressure 7 MPa）

CGS-N12E Grip inner diameter

13

14

15

5.67 kN
16 （Hydraulic pressure 7 MPa）

CGS-N13E Grip inner diameter3 Grippersø 12

ø12, ø13 has been available in two diﬀerent models of the clamping force.
： It comprises the same output force cylinder with CGS-N12E grip inner diameter ø9,10.

11

CGS- N1□□□

エクスパンション
Expansion clamp
クランプ

7MPa
7MPa

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

Space where metal chips can intrude is created

GripperRod

Space
ScraperA

B

A

Refer to → pages 15, 16

Rod
4 Grippers

ScraperB

When clamping

B-B

A-A

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

Secure chip protection

B

GripperRod

Scraper

ScraperA

Refer to → pages 17, 18

ARod
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

A

Refer to → pages 19~22

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.

12

CGS- N1□□□

Expansion clamp

Singleacting

7MPa

Specifications
Size

CGS ー N1

Grip inner diameter1− ：Air blow model

2

E ：Non-constant air blow model3

E ：Non-constant air blow model

06

07

09

10

11

12

13

12

13

14

：Number of grippers： 4 Grippers

08： 2 Grippers： 3 Grippers
15

16 ： 3 Grippers
indicates made to order.

CGS-N11-

Size
Model
Grip inner diameter06

Number of grippers

07

CGS-N12E
08

09

4 Grippers

10

11

CGS-N13E
12

13

2 Grippers

12

13

14

15

3 Grippers

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

kN

0.86 1

1.66

2.73

5.67

kN

3.63 1

6.78

10.9

23.2

Taper rod stroke

mm

4.2

Clamp stroke

mm

1.2

Cylinder capacity

cm3

Allowable eccentricity 2

mm

±0.5

Recommended air blow pressure

MPa

0.3

Recommended sensor air pressure

MPa

0.2

Mass
Recommended tightening 3
torque of mounting screws 

1.7

16

2.7

5.5

kg

0.34

0.45

0.73

N･m

3.5

7

11

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

Workpiece material
Allowable min. grip inner diameter

mm

5.7

6.7

7.7

8.7

9.7

10.7

11.7

12.7

11.7

12.7

13.7

14.7

15.7

Allowable max. grip inner diameter

mm

6.7

7.7

8.7

9.7

10.7

11.7

12.7

13.7

12.7

13.7

14.7

15.7

16.7

Grip inner diameter tapering angle (Draft angle)

3°or below

Grip inner diameter circularity

0.1 or below● Working pressure range：2.5〜7 MPa（CGS-N11-06：2.5〜4MPa） ● Proof pressure：10.5 MPa● Operating temperature：0〜70 ℃● Fluid used：General mineral based hydraulic oil（ISO-VG32 equivalent）

 1：Capacity values for hydraulic pressure of 4 MPa are shown.
 2：By the eccentric mechanism, the expansion clamp does not have a workpiece positioning function.  3：ISO R898 class 12.9
Please inquire if above terms are not applied.

Clamping force & hydraulic pressure
CGS-N11-06
Working pressure range

Clamping force (kN)6
CGS-N13E

5

CGS-N11Clamping force

4

MPa

2.5

3

4

5

6

7

kN 0.47

0.60

0.86

1.13

1.40

1.66

kN 0.71

0.93

1.38

1.83

2.28

2.73

kN 1.69

2.13

3.02

3.90

4.78

5.67

F＝0.226×P−0.20

CGS-N12E
Clamping force

3
CGS-N12E

F＝0.448×P−0.41

2

CGS-N13E
Clamping force

CGS-N11-102.5

F＝0.884×Pー0.52

P：Hydraulic pressure（MPa）
3

4

5

Hydraulic pressure (MPa)13

Hydraulic pressure

6

7● CGS-N11-06 applicable working pressure should be 2.5 to 4MPa.

CGS- N1□□□

エクスパンション
Expansion clamp
クランプ

7MPa
7MPa

DoubleSingleactingactingAir blow model hydraulic and air circuit diagram

P.S.

Clamping
hydraulic pressure

Air sensor unit

Sensor air
0.2MPa（Recommended air pressure)

Flow control valve（Meter-in control）

Air blow
0.3MPa（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.

Non-constant air blow model hydraulic and air circuit diagram

P.S.

Clamping
hydraulic pressure

Air sensor unit

Sensor air
0.2MPa（Recommended air pressure)

Flow control valve(Meter-in control)

Switching valve

Air blow(

Opened toatmospherewhen 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 andwhen clamping and unclamping to remove metal chips and debris.
● Clamp state observation or operating check by the air sensor should be made while air blow is OFF. In this case, thevalve switching the port open to the atmosphere when air blow is OFF should be used so that it can become an
exhaust path for clamping sensor air.

14

CGS- N11- □Expansion clamp

7MPa

SingleactingDimensions
E

Seating surface
outer diameter øU

Sensor nozzle ø1

Seating surface
inner diameter øT

0.5

A

45°

□31

□40

A

5.5

ø 54

A-A

details
Clamp removal thread
4-M5×0.8 thread throughRod outer diameter
Gripper outer diameter
øR

4-ø8

F2
F5

F1

15°

30°

15 ±0.005

P
5.5
M

4-ø4.5AEøAD

-0.025

ø34 f7 -0.050

32

O-ring AS568-026
5 (5°tapering)-0.025

ø33 f7 -0.050
2-O-ring AS568-025

ø32.5

Min. F2

Grip inner diameter usage requirements

Min. F1+0.5

Blow air supply port

Blind holeThrough hole

mm
Model

Blow air supply port
M5×0.8 depth 5

E

CGS-N1106

07

08

5.1

5.8

6.5

F1

9

10

F2

5.5

6

F5

2

2.5

M

56

57

P

24

25

øR

5.5

6.5

7.5

● Mounting screws are not included.

øT

10

11

12

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

øU

18

19

20

● Seating surface hardness is HRC55.

ø AD

4.3

5.3

5.8

● The above diagram indicates unclamped condition.

AE

R0.6

CGS-N11-06, 07, 08 are made to order.

15

R1

- N11-□CGS
CGS- N1□□□

エクスパンション
Expansion clamp
クランプ

7MPa
7MPa

DoubleSingleactingactingMounting details

↑
X

↑
X

For blind hole X-X

For through hole X-X

ø35 ±0.05

30°

Rz6.3

Max.
ø6

7
12

Rz6.3

30°

Rz6.3

Max.
ø6

11
23
Min.
(H8 Rz6.3 range) 5

Min. 28

Max.
ø6
Max.
ø6

1
11

7
12

ø4 ~ ø6

Clamping
hydraulic port

6.3

6.3

.4

+0.0390Rz

R0ø34 H830°

6.3

Blow air
supply port

Sensor air
supply port

Rz

Clamping
hydraulic port

12

Rz6.3

30°

Rz

23
Min.
(H8 Rz6.3 range) 5+0.0390

6.3

Min. 32.5

ø34 H8

30°

Rz

Min.
(H8 Rz6.3 range) 5

Rz6.3

6.3

6.3

Rz6.3

ø35 ±0.05

Rz

Rz

Sensor air
supply port

1

30°

□31

4-M4

+0.039

ø33 H8 0

Min. ø4+0.039
ø33 H8 0

Blow air supply portbottom face processing range： Blow air supply port must be provided oneither side or bottom face.

● The mounting surface finish must be no rougher than Rz6.3（ISO4287:1997）.
● 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. Ensurethat there are no interference on taper area when drilling the piping hole.

16

CGS- N12E□

Expansion clamp

Singleacting7MPaDimensions

E

Sensor nozzle ø1

Seating surface
outer diameter øU
Seating surface
inner diameter øT

ø 63

45°

0.5

7

□37

□48

A
A

A-A

details
Clamp removal thread
4-M6×1 thread throughRod outer diameterøF4
øAD
15 ±0.005

32

ø41 f7 -0.050

Gripper outer diameter
øF3

2.5

10

°

-0.0254-ø5.5

R1

30

5.5

57

4.5

25

15°

4-ø9.56 (5°tapering)

2-O-ring AS568-029-0.025

ø40 f7 -0.050
O-ring AS568-028

ø39.5
Blow air supply port

Grip inner diameter usage requirements

Min. 10.5

Min. 5.5(Sensor air exhaust port)

Blind holeThrough hole

mm
Model

09

10

E

5.7

6.4

ø F3

8.5

9.5

ø F4

8.55

9.55

øT

13

14

øU

21

22

ø AD

6.8

7.8

Blow air supply port
(Sensor air exhaust port)
M5×0.8 depth 5● Mounting screws are not included.
● Material used for O-ring is fluorocarbon (Hardness Hs90).

CGS-N12E● Seating surface hardness is HRC55.
● The above diagram indicates unclamped condition.

CGS-N12E09, 10 are made to order.

17

CGS
CGS--N1
N12E□□□□

エクスパンション
Expansion clamp
クランプ

7MPa
7MPa

DoubleSingleactingactingMounting details

↑
X

↑
X

□37

4-M5

For blind hole X-X

For through hole X-X

ø42 ±0.05

30°

Rz6.3

+0.039
ø40 H8 0

Max.
ø6

7
Max.
ø6

12

Rz6.3

1

1

ø4 ~ ø6
Min. ø423
Min.
(H8 Rz6.3 range) 5
11Min. 28

7
Max.
ø6
Max.
ø6

Rz6.3

12
12

(Sensor air
exhaust port)

Clamping
hydraulic port

6.3

6.3

.4

30°

+0.039
0

Rz

R0

Rz

23
Min.
(H8 Rz6.3 range) 5
11

6.3

Min. 32.5

Blow air
supply port

ø41 H830°

6.3

Clamping
hydraulic port

Rz

Rz

Min.
(H8 Rz6.3 range) 530°+0.0390

Sensor air
supply port

6.3

6.3

ø41 H830°

ø42 ±0.05

Rz

Rz

Sensor air
supply port

Rz6.3

30°

+0.039

ø40 H8 0

Blow air supply port(sensor air exhaust port)bottom face processing range： Blow air supply port (sensor air exhaust port) must
be provided on either side or bottom face.

● The mounting surface finish must be no rougher than Rz6.3（ISO4287:1997）.
● 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. Ensurethat there are no interference on taper area when drilling the piping hole.

18

CGS- N12E□

Expansion clamp

7MPa

SingleactingDimensions

E

Sensor nozzle ø1

Seating surface
outer diameter øU
Seating surface
inner diameter øT

ø 63

45°

0.5

7

□37

□48

A
A

A-A

details
Clamp removal thread
4-M6×1 thread throughRod outer diameterøF44-ø9.515 ±0.005

32

ø41 f7 -0.050

Gripper outer diameter
øF3

2.5

11.5

°

-0.0254-ø5.5

R1

30

6.1

58.5

4.5

26.5

15°

øAD

6 (5°tapering)

2-O-ring AS568-029-0.025

ø40 f7 -0.050
O-ring AS568-028

ø39.5
Blow air supply port

Grip inner diameter usage requirements

Min. 12

Min. 6.1(Sensor air exhaust port)

Blind holeThrough hole

mm
Model

11

12

13

E

7.1

7.8

8.5

ø F3

10.5

11.5

12.5

ø F4

10.55

11.55

12.55

øT

15

16

17

øU

23

24

25

ø AD

8.2

9.2

10.2

Blow air supply port
(Sensor air exhaust port)
M5×0.8 depth 5● Mounting screws are not included.
● Material used for O-ring is fluorocarbon (Hardness Hs90).

CGS-N12E● Seating surface hardness is HRC55.
● The above diagram indicates unclamped condition.

CGS-N12E11, 12, 13 are made to order.

19

CGS
CGS--N1
N12E□□□□

エクスパンション
Expansion clamp
クランプ

7MPa
7MPa

DoubleSingleactingactingMounting details

↑
X

↑
X

□37

4-M5

For blind hole X-X

For through hole X-X

ø42 ±0.05

30°

Rz6.3

+0.039
ø40 H8 0

Max.
ø6

7
Max.
ø6

12

Rz6.3
Rz6.3

23
Min.
(H8 Rz6.3 range) 51112

ø4 ~ ø6
Min. ø4

Clamping
hydraulic port

6.3

(Sensor air
exhaust port)

30°+0.039
0

Rz

6.3

.4

Min. 28

7
Max.
ø6
Max.
ø6

12

Rz6.3

Blow air
supply port

ø41 H830°

6.3

Clamping
hydraulic port

1

Sensor air
supply port

Rz

R0

Rz

23
Min.
(H8 Rz6.3 range) 51130°+0.0390

6.3

Min. 32.5

ø41 H8

30°

Rz

Min.
(H8 Rz6.3 range) 5

Rz6.3

6.3

6.3

Rz6.3

ø42 ±0.05

Rz

Rz

Sensor air
supply port

130°

+0.039

ø40 H8 0

Blow air supply port(sensor air exhaust port)bottom face processing range： Blow air supply port (sensor air exhaust port) must
be provided on either side or bottom face.

● The mounting surface finish must be no rougher than Rz6.3（ISO4287:1997）.
● 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. Ensurethat there are no interference on taper area when drilling the piping hole.

20

CGS- N13E□

Expansion clamp

Singleacting7MPaDimensions
E

Sensor nozzle ø1

Seating surface
outer diameter øU
Seating surface
inner diameter øT

45°

0.5

8

□46

□59

ø 77

details
Clamp removal thread
4-M8×1.25 thread throughRod outer diameter
øF4

4-ø11
15 ±0.005

32

ø53 f7 -0.060

Gripper outer diameter
øF3

2.5

11.5

°

-0.0304-ø6.8

R1

30

6.1

58.5

4.5

26.5

10°

øAD

O-ring AS568-033
6 (5°tapering)-0.030

ø52 f7 -0.060
2-O-ring AS568-032

ø51.5

Grip inner diameter usage requirements

Min. 12(Sensor air exhaust port)

Min. 6.1

Blow air supply port

Blind holeThrough hole

mm
Model

12

13

14

15

16

E

6.8

7.5

8.3

8.9

9.6

ø F3

11.5

12.5

13.5

14.5

15.5

ø F4

11.55

12.55

13.55

14.55

15.55

øT

16

17

18

19

20

øU

24

25

26

27

28

ø AD

9.2

10.2

11.2

12.2

13.2

Blow air supply port
(Sensor air exhaust port)
M5×0.8 depth 5● Mounting screws are not included.
● Material used for O-ring is fluorocarbon (Hardness Hs90).

CGS-N13E● Seating surface hardness is HRC55.
● The above diagram indicates unclamped condition.

CGS-N13E12, 13, 14, 15, 16 are made to order.

21

CGS
CGS--N1
N13E□□□□

エクスパンション
Expansion clamp
クランプ

7MPa
7MPa

DoubleSingleactingactingMounting details

↑
X

↑
X

For blind hole X-X

For through hole X-X

30°

ø54 ±0.05

Rz6.3

Max.
ø6

7
Max.
ø6

12

Rz6.3

1

1
11
23

Min.
(H8 Rz6.3 range) 5

Blow air supply port(sensor air exhaust port)bottom face processing range

Clamping
hydraulic port

6.3

6.3

+0.046
ø52 H8 0(Sensor air
exhaust port)

30°+0.046
0

Rz

Rz

.4

12

6.3

R0

Min. 28

Max.
ø6
Max.
ø6

7
12

Rz6.3

Blow air
supply port

ø53 H830°

6.3

Clamping
hydraulic port

Rz

Rz

Min. 32.5
Min.
23(H8 Rz6.3 range) 5Min.
11(H8 Rz6.3 range) 530°+0.0460

Sensor air
supply port

6.3

6.3

ø53 H830°

ø54 ±0.05

Rz

Rz

Sensor air
supply port

Rz6.3

30°

□46

4-M6

ø52 H8+0.0460： Blow air supply port (sensor air exhaust port) must
be provided on either side or bottom face.

● The mounting surface finish must be no rougher than Rz6.3（ISO4287:1997）.
● 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. Ensurethat there are no interference on taper area when drilling the piping hole.

22

CGS- N1□□□

Expansion clamp

7MPa

SingleactingGripper set replacement

Number of grippers

Gripper set model

Clamp model

CGS-N11-J06

CGS-N11-06

CGS-N11-J07

CGS-N11-07

CGS-N11-J08

CGS-N11-08

CGS-N12EJ09

CGS-N12E09

CGS-N12EJ10

CGS-N12E10

CGS-N12EJ11

CGS-N12E11

CGS-N12EJ12CGS-N12E12CGS-N12EJ13

CGS-N12E13

CGS-N13EJ12CGS-N13E12

CGS-N13EJ13

CGS-N13E13

CGS-N13EJ14

CGS-N13E14

CGS-N13EJ15

CGS-N13E15

CGS-N13EJ16

CGS-N13E16

4 Grippers

Set description

O-ring × 1

Gripper(Refer to left table)

Scraper × 1

2 Grippers

3 Grippers
It is recommended that grippers, scrapers
and O-rings be replaced after about 200,000
operations. Replace grippers in sets and notjust an individual gripper. (Refer to the tableon the left for the gripper set model.)Grip inner diameter & rod height when clamping

Rod height12

Rod height (mm)

11

10

ø1 1
9

〜ø1

6

8

ø8 〜

7

ø6 〜

6
-0.3

ø1 0

Rod height calculation formula
Actual grip inner diameter andø7ø6 〜 ø7 ： 7.82−2.84×nominal grip diameter diﬀerence
Actual grip inner diameter and

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

ø8 〜 ø10 ： 8.82−2.35×nominal grip diameter diﬀerence
Actual grip inner diameter andAllowable min.
grip inner diameter

Nominalgrip inner diameter

Allowable max.
grip inner diameterDiﬀerence between actual grip inner diameterand nominal grip diameter (mm)23

ø11 〜 ø16 ：10.32−2.35×nominal grip diameter diﬀerence
Example：When CGS-N12E10（Nominal grip diameter : ø10）is
clamping ø9.8 hole
Rod height = 8.82 − 2.35 × (-0.2) = 9.29mm

CGS- N1□□□

エクスパンション
Expansion clamp
クランプ

DoubleSingleactingacting

7MPa
7MPa

System configuration example

Workpiece
guide 2

Workpiece positioning pin（Diamond）3

Expansion clamp
model CGS-N1

Workpiece guide2

Workpiece bottom shapeSensor nozzle (Workpiece seating detection) 1

Expansion clamp
model CGS-N1

model CGS-N1

Workpiece positioning pin（Round）3

Workpiece guide
Workpiece positioning pin（Diamond）32

Workpiece positioning pin（Round）3

10mm and overExpansion clamp

Grip inner diameter D

Rod outer
diameter d

Diametral space
D-d and under

Expansion clamp

Expansion clamp

model CGS-N1

model CGS-N1

 1： The sensor nozzie (workpiece seating detection) can be set at any position by installation phasr of CGS
and can be friend to the rib shape of workpiece bottom. As the internal design can be made easily,
piping layout is not reguired to change acoording to installation phase of CGS, the jig.

 2： When using automatic or robotic conveyers, prevent damage to clamp caused from impact by setting
workpiece guides.
Using the above guide as reference, position the holes and accurately when using workpiece guides.

 3： The expansion clamp does not have a workpiece positioning function.
Install workpiece positioning pins (or similar).

24

CGS- N1□□□

Expansion clamp

Singleacting

7MPa

Caution in use● Be sure to make inner diameter of air blow circuit 4mm andover.

● Perform

unclamping

completion

detection,

clamping

completion detection and incomplete clamping detection
with combination actions of pressure switch and sensor
shown in table below. (Refer to the hydraulic and air circuit● Set the workpiece in such a way that the clamping hole ofdiagram on page → 14 for details.）

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

Applications

Pressure switch(P.S.)Air sensor

Unclamping completion detection

OFF―

Clamping completion detection

ON

ON

Incomplete clamping detection

ON

OFF

hole, 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.

● Manufacturer models described below are recommended for
air sensors.

● Flaring (Biting) of gripper into workpiece varies depending

Manufacturer nameProduct models

SMC Corporation

ISA3-F/G series

CKD Corporation

GPS2-05 series

on workpiece material or thermal processing conditions.
With regards to conditions of workpiece and clamping hole,refer to page → 13. 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 less isrecommended.

● Set detection range of air sensor to 0.05 mm and under fromseating surface. Insert a feeler gauge between workpiece andseating surface to create detection distance in order toperform setting accurately. Refer to instruction manual of air
sensor for details on setting methods.

25

CGS- N1□□□

エクスパンション
Expansion clamp
クランプ

7MPa
7MPa

DoubleSingleactingactingOperation 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
loading

State

Clamping

Clamping
1
completion (Machining)

Unclamping

Unclamping
2
completion 

Workpiece
unloading

Workpiece Clamp
clamp
Unclamp4

ON
Air blowOFFON
Sensor air
OFF5

Clamping hydraulicpressure P.S.

OFF

ON

OFF

ON or OFF 

Air sensor

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

Case of non-constant air blow model
Workpiece
loading

State

Clamping

Air blowOFF

Clamping
1
completion

(Machining)

Air blowON

Unclamping

Unclamping
2
completion 

Workpiece
unloading

Workpiece Clamp
clamp
Unclamp4

ON
Air blowOFFON
Sensor air
OFF5

Clamping hydraulicpressure P.S.

OFF

Air sensor

ON
ON or OFF OFF3 1 : Clamping completion : P.S.＝ON Air sensor＝ON
 2 : Unclamping completion : P.S.＝OFF 3 : ON : Complete clamping OFF : Incomplete clamping
 4 : Solenoid valve control
 5 : Hydraulic pressure switch, Air sensor signal

26

Itami, Hyogo, Japan 664-8502
TEL. 072-777-3333 FAX. 072-777-3520

CERTIFICATE OF APPROVAL ISO9001

CLS-42E-7
2024. 03

Specifications are subject to change without prior notice.