air expansion X clamp
double acting
airDoubleactingmodel

CGX

In n o v a ti v e w o r k p i e c e c l amp i n g to o lw w w. p a s c a l e n g . c o . j p

CGX- N22□□

ａｉｒ

Air expansion clamp

Doubleactingair

Expansion clamp
model

CGX
Double acting

air

Outstanding tool accessibility

Superior tool accessibility

Short tool

Dramatically improved flatness & roughness

Non-distortion clamping at bottom of workpiece

Bore depth
20 mm(CGX-N22)

expansion clamp model CGX

Short loading stroke

Compact and simple jig ﬁxture

Thinner jig plate

The expansion clamp holds firmly the clamping hole at the bottom of workpiece and clamps it firmly down to theseating surface by utilizing taper rod and tapered surface of gripper. Clamping force is transmitted directly to seating
surface and holds workpiece in place firmly without any distortion or deflection, making high grade and stablemachining possible.

Workpiece
Taper rod
Gripper

Seatingsurface1TaperedsurfaceCGX- N22□□

ａｉｒ

Air expansion clamp

DoubleactingWorkpiece setting① Pistons Ⓐ & Ⓑ, as well as taper rod and gripper are raised by unclamping air.
② Set the workpiece onto the seating surface. In order detect if actual unclamping has occurred using the
air sensor, allow air needed to confirm seating to flow by using cylinder (or similar) to lift work up during
unclamping.

Taper rod

Clamping hole

Gripper

Seating detection air
outletSeatingsurface

Scraper

LifterPiston Ⓐ

Piston Ⓑ

Clamping air

Unclamping air

Seating detection air

Workpiece holding① Release unclamping air and apply clamping air pressure. Piston Ⓐ will remain in upright position as piston Ⓑ
and taper rod are lowered.
② As piston Ⓐ remains in upright position, the gripper is expanded horizontally along the tapered surface of thetaper rod to grip clamping holes.
③ The gripper securely grips the internal face of the clamping holes and pulls the workpiece down firmly onto theseating surface.
④ Workpiece holding is completed by the seating detection air sensor, clamping and unclamping air pressure.

Taper rod

Clamping hole

GripperTapered surface

Seatingsurface

Seating detection air
outletIncomplete clamping
detection valve
Piston Ⓐ

O-ringPiston Ⓑ

Centering function
Clamping air

Unclamping air

Seating detection air

2

CGX- N22□□

ａｉｒ

Air expansion clamp

DoubleactingDetects deformation of workpiece and floating of workpiece resulting in faulty setting
When workpiece has significant deformation or when it is set poorly with space of 1.2 mm above seating surface(Figure 1-a) or when metal chips are caught by clamp (Figure 1-b), the workpiece is not held on seating surface
and air sensor is unable to detect seating and this confirms incomplete clamping.

Faulty setting of workpiece

Seating surface

Workpiece set ﬂoating
1.2 mm or more above
seating surface

Figure 1-a

Metal chips
caught by clamp

Figure 1-b

Floating of workpiece

Incomplete clamping detection
Seating detection air ﬂow :Sensor is not triggered

Clamping air

3

Unclamping air

Seating detection air

CGX- N22□□

ａｉｒ

Air expansion clamp

Detects incomplete gripping

Doubleacting

PAT. JP4297511

When gripper fails to grip properly due to large draft angle of grip inner diameter, piston Ⓐ continues to stroke
down until incomplete clamping detection valve Ⓒ is triggered. Since seating detection air is released, air sensor
is unable to detect seating of workpiece and this confirms incomplete clamping.

Large draft angle of grip inner diameter

Slipping of gripper

Clamping hole
Taper rod
Gripper

air blow model：Exhaust

Incomplete clamping
detection valve Ⓒ

Piston Ⓐ

Seating detection air

non-constant air blow model：Exhaust（air blow circuit）

Seating detection air

Seating detection air

Piston Ⓐ
Piston Ⓐ

Incomplete clamping
detection valve Ⓒ

Incomplete clamping
detection valve Ⓒ

Incomplete clamping detection

Normal clamping

Since piston Ⓐ continues with stroke

Piston Ⓐ stops in the middle of stroke

down

and incomplete clamping detection

until

incomplete

clamping

detection valve Ⓒ is triggered, seating

valve Ⓒ is not triggered.

detection air continues to ﬂow andsensor is not triggered.

4

CGX- N22□□

Air expansion clamp

ａｉｒ

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

Grip inner diameter

Taper rod diameter

Min. grip inner diameter

ø10

ø9.55

ø9.7

Max. grip inner diameter Draft angle of grip inner diamet
ø10.7
max. 3°each side

(Example: model CGX-N22E10)

Taper rod and gripper with superior durability① The gripping force of expansion clamp is transmitted from tapered surface to gripper, making it possible for the gripper
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 Seatingng
surfacee5② Flange

CGX- N22□□

Air expansion clamp

Doubleactingａｉｒ

Clamping hole pitch errors can be tolerated

Taper rod and gripper slide radially and tolerate
pitch errors (±1 mm).
Taper rod and gripper are pushed back towards
the center by O-ring when unclamping.
Taper rod
Allowable eccentricity ±0.5 mm

Allowable eccentricity ±0.5 mm

Clamping hole

Gripper

SlidingO-ringIncorporating strong air blowing circuit① Air blown from a space between the gripper and scraper clears off metal chips and coolant that stay on theseating surface.
② Flushing channel is also provided on the seating surface to remove the metal chips and coolants smoothly
during workpiece setting.

Gripper② FlushingchannelScraper

Seatingsurface

Air blow6

CGX- N22□□

ａｉｒ

Air expansion clamp

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

Refer to page

3 Gripø11 ~ ø13

Grip inner diameter

ø 11

12

13

Non-constant air blow model
Clamping force(air pressure 0.5 MPa)Model

0.8 kNCGX-N22E Grip inner diameter

Refer to page2 Gripø9 , ø10

Grip inner diameterø910

ø6 ~ ø8

Grip inner diameter

ø6

7

7

8

11 and 12

Non-constant air blow model
Clamping force(air pressure 0.5 MPa)Model

0.8 kNCGX-N22E Grip inner diameter

Refer to page

4 Grip9 and 1013 and 14

Air blow model
Clamping force(air pressure 0.5 MPa)Model

0.8 kNCGX-N22- Grip inner diameterCGX- N22□□

ａｉｒ

Air expansion clamp

Doubleactingreduces air consumption and is measurably energy saving. Still, be sure to air blow at time of workpiece replacement.

GripperRod

3 Gripper

A

A

C

C
Scraper

When clamping

B

Secure chip protection

B

ScraperRod

Scraper3 Gripper

B-B

A-A

GripperRod

Even for the areas
where there is no
gripper, air blow
during cutting process is not necessary
as chip intrusion isprevented thanks tothe scraper.

C-CC
2 Gripper

A

A

When clamping

Scraper

B

B
C

Secure chip protection
Scraper

Scraper2 Gripper

Rod

A-A

B-B

C-C

GripperRod

4 Gripper

A

C

A

When clamping

Scraper

B

Constant air blow isnecessary as sealing
will not take place
for the areas where
there is no gripper.

B

Space

C
ScraperSpace

4 Gripper

Rod

A-A

B-B

C-C

8

CGX- N22E□

3 GripAir expansion clamp

Doubleactingａｉｒ

Non-constant air blow model

PAT.

Non-constant air blow model
ø11

Grip inner diameter

ø12

ø13

Model

CGX-N22E Grip inner diameter

Clamping force

0.8 kN (air pressure 0.5 MPa)

Radial expansion force

2.4 kN (air pressure 0.5 MPa)

（Example：CGX-N22E11)

ø57：made to order
Model CGX-N22E with grip inner diameter ø11~ø13：
GripperRod

During clamping, rod will stroke and expand scraper. Thanks
to a new mechanism, open space is removed between

Scraperrod, gripper, and scraper. As chip intrusion is prevented, airblow during cutting process has been eliminated. (Air blow
will only be necessary during clamping and unclamping
operation.) As a result, air consumption has been significantly
reduced compared to the traditional model.

Unclamp

Secure chip protection

GripperRod

Rod

GripperA

A

ScraperRod

Scraper

Gripper

When clamping

A-A

Scraper

Clamp

Specifications

Clamping force & air pressure
1.6

CGX-N22E

CGX-N22E Grip inner diameter

Model
Number of grippers

3

Working air pressure range (MPa)0.3 ~ 1

Proof pressure
Clamping force 1
1

(MPa)

1.5

(kN)

0.78

(kN)

2.4

Taper rod stroke

(mm)

4.2

Clamp stroke

(mm)

1.2

(cm 3)

7.6

Radial expansion force

Cylindercapacity

Clamp
UnclampAllowable eccentricity

3

(cm )

9.2

(mm)

± 0.5

Recommended air blow pressure

(MPa)

0.3

Recommended seating
detection air pressure

(MPa)

0.2

(℃ )

0 ~ 70Operating temperature
Fluid used
Mass

Air
(kg)

1.2
1.0
0.8
0.6
0.4
0.2
0
0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

Air pressure (MPa)

Air pressure (MPa)Clamping force

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

(kN) 0.47 0.62 0.78 0.93 1.09 1.24 1.40 1.55

0.65

1: Capacity values for air pressure of 0.5 MPa are shown.
9

Clamping force (kN)

1.4

F: Clamping force (kN)＝1.551×P: Air pressure (MPa)CGX- N22E□

Air expansion clamp

CGX-N22E 11, 12, 13

Mounting details
E

Seating detection air outlet ø1

30.5
48

15

15

3-Max.ø 2.5

15

48
15

15

15

48

30.5

Seating detection
9 air connection port

7

ø7

59.6

Doubleactingａｉｒ

Non-constant air blow model

Air blow connection port

30.5

30.5

4-M5

M6×1 thread through(clamp removable tap)

70

∗

10°

1
R0

Rz25

19.5

Unclamping
bottom piping range
O-ring (included) 2-P4
(ﬂuorocarbon hardness Hs90)-0.030ø 57 f 7 -0.060

O-ring (included) P4(ﬂuorocarbon
hardness Hs90)

O-ring (included) AS568-034(ﬂuorocarbon hardness Hs90)

ø56.5

.4

(ø3)

Unclamping
air connection port

4.5

26.5

5 15 ±0.005

øT

6.3

20 ±0.1

Rz6.3

Rz

Seating surface
inner diameter+0.0460

Rz6.3

Seating surface
outer diameterøU

46

ø 57 H830°(H8 range)
Min. 1048

Unclamping
side face piping range

Clamping
air connection
port

4-ø5.5
Spot facing ø9.5

ø 56.8+0.2
0Rz: ISO4287(1997)
details
Rod outer diameter
øF4
øAD

30

Min. 12°

Gripper outer diameter
øF3

2.5

6.1

Min. 6.1

11.5

Grip inner diameter usage requirements

R1

6 (5ﾟ tapering)
Blind holeThrough hole(mm)

CGX-N22E Grip inner diameter

Model

CGX-N22E Grip inner diameter

Model

Workpiece material (hardness)

Aluminum, steel and others (HRC25 or below).
Cast iron are not usable.

E

7.1

7.8

8.5

F3

10.5

11.5

12.5

F4

10.55

11.55

12.55

T

15

16

17

U

23

24

25

AD

8.2

9.2

10.2

Grip inner diameter

(mm)

11

12

13

Allowable min. grip inner diameter (mm)

10.7

11.7

12.7

Allowable max. grip inner diameter

11.7

12.7

13.7

(mm)

Grip inner diameter tapering angle (draft angle)

3ﾟor below

Grip inner diameter circularity

0.1 or below

Please inquire if above terms are not applied.

11

12

13

Note 1. Mounting screws are not included.
2. Included O-ring must be used at all times.
3. Seating surface hardness is HRC55.

10

CGX- N22E□

2 GripAir expansion clamp

Doubleactingａｉｒ

Non-constant air blow model

PAT.

Non-constant air blow model
ø9

Grip inner diameter

ø10

Model

CGX-N22E Grip inner diameter

Clamping force

0.8 kN (air pressure 0.5 MPa)

Radial expansion force

2.4 kN (air pressure 0.5 MPa)

（Example：CGX-N22E09)

ø57：made to order
Model CGX-N22E with grip inner diameter ø9 and ø10：
Rod

GripperDuring clamping, rod will stroke and expand scraper. Thanks
to a new mechanism, open space is removed between
rod, gripper, and scraper. As chip intrusion is prevented, airblow during cutting process has been eliminated. (Air blow
will only be necessary during clamping and unclamping
operation.) As a result, air consumption has been significantly
reduced compared to the traditional model.

Scraper

Unclamp

Secure chip protection

GripperRod

Rod

GripperA

ScraperA
GripperRod

Scraper

Clamp

Specifications

A-A

Scraper

When clamping

Clamping force & air pressure
1.6

Number of grippers

2

Working air pressure range (MPa)0.3 ~ 1

Proof pressure

(MPa)

1.5

Clamping force 1

(kN)

0.78

Radial expansion force 1

(kN)

2.4

Taper rod stroke

(mm)

4.2

Clamp stroke

(mm)

1.2

Clamp

(cm 3)

7.6

Unclamp(cm 3)

9.2

Allowable eccentricity

(mm)

± 0.5

Recommended air blow pressure

(MPa)

0.3

Recommended seating
detection air pressure

(MPa)

0.2

(℃ )

0 ~ 70Cylindercapacity

Operating temperature
Fluid used
Mass

Air
(kg)

1.2
1.0
0.8
0.6
0.4
0.2
0
0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

Air pressure (MPa)

Air pressure (MPa)Clamping force

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

(kN) 0.47 0.62 0.78 0.93 1.09 1.24 1.40 1.55

0.64

1: Capacity values for air pressure of 0.5 MPa are shown.
11

CGX-N22E

1.4

Clamping force (kN)Model

CGX-N22E Grip inner diameter

F: Clamping force (kN)＝1.551×P: Air pressure (MPa)CGX- N22E□

Air expansion clamp

CGX-N22E 09, 10

Mounting details

E

Seating detection air outlet ø1

30.5

15

3-Max .ø 2.5

15
15

15

15

48

7
15

48

30.5
48

Seating detection air
9ø7 connection port

59.6

Doubleactingａｉｒ

Non-constant air blow model

Air blow connection port
4-ø5.5
Spot facing ø9.5

48

M6×1 thread through(clamp removable tap)

30.5
70

R0

Rz25

.4

(ø3)

4.5

Unclamping
air connection port

19.5

Unclamping
bottom piping range-0.030O-ring (included) P4(ﬂuorocarbon
hardness Hs90)

ø 56.8O-ring (included) 2-P4
(ﬂuorocarbon hardness Hs90)

ø 57 f 7 -0.060+0.2
0Rz: ISO4287(1997)

O-ring (included) AS568-034(ﬂuorocarbon hardness Hs90)

ø56.5

Unclamping
side face piping range

10°

5 15 ±0.005

25

6.3

∗

øT

Rz

20 ±0.1

Rz6.3

Seating surface
inner diameter+0.0460

Rz6.3

Seating surface
outer diameter
øU

44.5

ø 57 H830°(H8 range)
Min. 10

30.5

4-M5

1

Clamping
air connection
port

details
Rod outer diameterøF4
øADGrip inner diameter usage requirements

5.5°

Gripper outer diameter
øF3

2.5

Min. 10.5

Min. 5.5

10

30

R1

6 (5ﾟ tapering)
Blind holeThrough hole(mm)

CGX-N22E Grip inner diameter

Model

CGX-N22E Grip inner diameter

Model

Workpiece material (hardness)

Aluminum, steel and others (HRC25 or below).
Cast iron are not usable.

E

5.7

6.4

F3

8.5

9.5

Grip inner diameter

(mm)

9

10

Allowable min. grip inner diameter (mm)

8.7

9.7

Allowable max. grip inner diameter (mm)

9.7

10.7

Grip inner diameter tapering angle (draft angle)

3ﾟor below

Grip inner diameter circularity

0.1 or below

Please inquire if above terms are not applied.

09

10

F4

8.55

9.55

T

13

14

U

21

22

AD

6.8

7.8

Note 1. Mounting screws are not included.
2. Included O-ring must be used at all times.
3. Seating surface hardness is HRC55.

12

CGX- N22- □Air expansion clamp

4 GripDoubleactingａｉｒ

Air blow model

PAT.

Air blow modelø6

Grip inner diameter

ø7

ø8

Model

CGX-N22- Grip inner diameter

Clamping force

0.8 kN (air pressure 0.5 MPa)

Radial expansion force

2.4 kN (air pressure 0.5 MPa)

(Example: CGX-N22-06)

ø57：made to orderRod

Model CGX-N22- with grip inner diameter ø6~ø8:

GripperDuring clamping, a space is created between the rod,
gripper, and scraper as a result of having a small diameter.
Constant air blow will be necessary to prevent intrusionof metal chips during the cutting process and during
clamping and unclamping.

Space
Scraper

UnclampRod

GripperRod

Scraper

GripperA

A
Rod
Scraper

When clamping

Specifications

Clamping force & air pressure

06

07

1.5

Clamping force 1

(kN)

0.78

Radial expansion force 1

(kN)

2.4

Taper rod stroke

(mm)

4.2

Clamp stroke

(mm)

1.2

Clamp

(cm 3)

7.6

Unclamp(cm 3)

9.2

Allowable eccentricity

(mm)

± 0.5

Recommended air blow pressure

(MPa)

0.3

Recommended seating
detection air pressure

(MPa)

0.2

(℃ )

0 ~ 70
Air

(kg)

1.2
1.0
0.8
0.6
0.4
0.2
0
0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

Air pressure (MPa)
Air pressure (MPa)Clamping force

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

(kN) 0.47 0.62 0.78 0.93 1.09 1.24 1.40 1.55

0.63

1: Capacity values for air pressure of 0.5 MPa are shown.
13

Clamping force (kN)

0.3~1

(MPa)

Fluid used

CGX-N22-

1.4

Proof pressure

Mass

1.6

08

4

Working air pressure range (MPa) 0.3~0.8

Operating temperature

CGX-N22-06
Working air pressure range

CGX-N22- Grip inner diameter

Number of grippers

Cylindercapacity

A-A

Scraper

Clamp

Model

Gripper

F: Clamping force (kN)＝1.551×P: Air pressure (MPa)CGX- N22- □Air expansion clamp

CGX-N22- 06, 07, 08

Mounting details
E

Seating detection air outlet ø1

30.5

30.5
48

Seating detection air
9ø7 connection port

3-Max .ø 2.5

15

15

15

48

15

15

7
15

48

59.6

Doubleactingａｉｒ

Air blow model

Air blow connection port

30.5

4-M5

M6×1 thread through(clamp removable tap)

30.5

6.3

20 ±0.1

Rz∗+0.046
0

Rz6.3

Rz6.3

Seating surface
outer diameterøUSeating surface
inner diameterø 57 H830°

70(H8 range)
Min. 1048

1

Clamping
air connection
port

4-ø5.5
Spot facing ø9.5

R0

Rz25

.4

4.5

Unclamping
bottom piping range-0.030ø 57 f 7 -0.060

O-ring (included) P4(ﬂuorocarbon
hardness Hs90)

ø56.5

Unclamping
side face piping range

10°

5 15 ±0.005(ø3)

Unclamping
air connection port

19.5

M

P

øT

ø 56.8+0.2
0O-ring (included) 2-P4
(ﬂuorocarbon hardness Hs90)

Rz: ISO4287(1997)

O-ring (included) AS568-034(ﬂuorocarbon hardness Hs90)

details
Rod outer diameter
Gripper outer diameter
øR
øAD

F5

F2

Min. F2

F1

Grip inner diameter usage requirements

Min. F1+0.5

AE

30°

5 (5ﾟ tapering)
Blind holeThrough hole

(mm)
Model

CGX-N22- Grip inner diameter

Model

Workpiece material (hardness)

Aluminum, steel and others (HRC25 or below).
Cast iron are not usable.

E
F1
F2
F5
M
P
R
T
U
AD
AE

Grip inner diameter

6

7

8

Allowable min. grip inner diameter (mm)

(mm)

5.7

6.7

7.7

Allowable max. grip inner diameter (mm)

6.7

7.7

8.7

Grip inner diameter tapering angle (draft angle)

3ﾟor below

Grip inner diameter circularity

0.1 or below

Please inquire if above terms are not applied.

CGX-N22- Grip inner diameter
06

07
4.5
9
5.5
2
43.5
24

5.5
10

6.5
11
19

4.3

5.3
R0.6

08
4.8
10
6
2.5
44.5
25
7.5
12
20
5.8
R1

Note 1. Mounting screws are not included.
2. Included O-ring must be used at all times.
3. Seating surface hardness is HRC55.

14

CGX- N22□□

ａｉｒ

Air expansion clamp

DoubleactingGripper set replacement
Number of grippers

4 Grippers

Gripper set model

Clamp model

CGX-N22-J06

CGX-N22-06

CGX-N22-J07

CGX-N22-07

CGX-N22-J08

CGX-N22-08

CGX-N22EJ09

CGX-N22E09

CGX-N22EJ10

CGX-N22E10

CGX-N22EJ11

CGX-N22E11

Set description
O-ring×1
Scraper×1

Gripper(Refer to tableleft)

2 Grippers

3 Grippers

CGX-N22EJ12

CGX-N22E12

CGX-N22EJ13

CGX-N22E13

It is recommended that grippers, scrapers andO-rings be replaced after about 200,000 operations.
Replace grippers in sets and not just individual grippers.
(Refer to the table on the left for the gripper set model.)Grip inner diameter & rod height when clamping

Rod height12

Rod height (mm)

11

10

ø11

〜ø

9

8

ø8〜

7

ø6〜

6
-0.3

-0.2

Allowable min.
grip inner diameter

-0.1

0

0.1

Nominalgrip inner diameter

0.2

0.3

0.4

13

ø10

Rod height calculation formulaø7

0.5

ø6 〜 ø7
0.6

0.7

Allowable max.
grip inner diameterDiﬀerence between actual grip inner diameterand nominal grip diameter (mm)15Actual grip inner diameter and： 7.82−2.35× nominal
grip diameter difference

Actual grip inner diameter andø8 〜 ø10 ： 8.82−2.35× nominal
grip diameter difference
Actual grip inner diameter andø11 〜 ø13：10.32−2.35× nominal
grip diameter difference

Example: When CGX-N22E10 (Nominal grip diameter: ø10）is clamping ø9.8 hole
Rod height = 8.82 - 2.35 × (-0.2) = 9.29mm

CGX- N22□□

ａｉｒ

Air expansion clamp

Doubleacting

System configuration example

expansion clamp
model CGX

Workpiece positioning pin（Circular）*2

expansion clamp
model CGX

Workpiece
guide *1

Workpiece guide *1

Workpiece positioning pin（Circular）*2

expansion clamp
model CGX

Workpiece guide *1

10mm or more

Workpiece positioning pin（Diamond-type cut）*2

Grip inner diameter D

Rod outer
diameter d

Diametral space
D-d or lessexpansion clamp Workpiece positioning pin
model CGX
（Diamond-type cut）*2

expansion clamp
model CGX

1: When using automatic or robotic conveyers, prevent damage to clamp caused from impact bysetting 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.
Please install workpiece positioning pins (or similar).

16

CGX- N22□□

ａｉｒ

Air expansion clamp

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

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

● Set the workpiece in such a way that the clamping hole ofworkpiece is perpendicular to seating surface. Clamping in● Set detection range of seating detection air sensor to 0.05

tilted condition results in uneven contact of gripper withmm or less from seating surface. Insert a feeler gauge be-hole, which leads to concentration of load that may cause

tween workpiece and seating surface to create detection

damage.

distance in order to perform setting accurately. Refer to
instruction manual of air sensor for details on setting meth-● Verify that there are no metal chips or debris on seating sur-ods.

face of clamping hole and clamp body before setting workpiece. Allowing intrusion of metal chips results in insecure● Perform unclamping completion detection, clamping com-clamping, which can lead to low grade of machining accu-

pletion detection and incomplete clamping detection withracy.

combination actions of pressure switch and sensor shown intable below.（Refer to air circuit diagram.）● Flaring (biting) of gripper into workpiece varies depending
on workpiece material or thermal processing conditions.

Applications

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

Unclamping completion detection

OFF

ON

ON

Clamping completion detection

ON

OFF

ON

Incomplete clamping detection

ON

OFF

OFF

With regards to conditions of workpiece and clamping hole,r e f e r t o p a g e →1 0 , 1 2 , 1 4 . S e c u r e c l a m p i n g i s n o tpossible 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 work-: In case of a lightweight workpiece or the like, sensor may

piece beforehand to verify that there are no problems withbe OFF.

operations.
● Deformation may occur if the thickness of clamping hole section 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.

Air sensor recommended condition of use

ISA3-F/G series
Supplier andmodel

Air supply
pressure

17

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 andcontrol it supplying air all the time in order to eliminate
intrusion of chips or coolant.
● There is a case that air sensing cannot be made successfully
as designed when it is used out of the usage shown on theleft. Contact Technical service center for more details.

CGX- N22□□

ａｉｒ

Air expansion clamp

DoubleactingNon-constant air blow model pneumatic 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

Seating
detection air

0.2MPa(Recommended air pressure)

P.S. 2

Switching valve
5μm
Unclamping air

Air blow(

Speed controller

Opened toatmospherewhen OFF)

0.3MPa(Recommended air pressure)(meter-out control)● Be sure to install a speed controller for meter-out control in unclamping air circuit and to adjust clamping speedby means of back pressure. (0.3 seconds and over when full stroking.) Immediate air pressure release of unclamping side of the clamp causes insufficient grip at wall of the clamping hole, which may result in incomplete clamping.
● 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.
● Be sure to turn air blow OFF while seating detection is occurring. Also, be sure to use an air switching valve that is
opened to atmosphere when air blow is OFF. (When incomplete clamping occurs, it is used as a seating detection
air exhaust path.

Air blow model pneumatic 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

Seating
detection air

0.2MPa(Recommended air pressure)

P.S. 25μm
Unclamping air

Air blow
0.3MPa(Recommended air pressure)

Speed controller(meter-out control)● Be sure to install a speed controller for meter-out control in unclamping air circuit and to adjust clamping speedby means of back pressure. (0.3 seconds and over when full stroking.) Immediate air pressure release of unclamping side of the clamp causes insufficient grip at wall of the clamping hole, which may result in incomplete clamping.
● 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 clamp hole, continue air blowing during processing
as well.

18

CG□

Expansion clamp

Standard

Long neck

Product lines

Long neck

Eccentric（no seating）

model

CGC

Clamp
Unclamp

7MPa
7MPa

model

CGT

Clamp
Unclamp

7MPa
7MPa

model

CGT-R

CGU

Clamp
Unclamp

Clamp
Unclamp

7MPa
7MPa

Seating surface is set apart from clamp.

19

model

7MPa
7MPa

CG□

Expansion clamp

Product lines

air

air

air

Flat

Standard

Long neckLong neck

model

model

model

model

CGS-N1

Clamp
Unclamp7MPaspringCGE

Clamp
Unclampair
air

CGY-F2CGY-F3Clamp
Unclamp

Clamp
Unclampair
airspringair

Refer to separate documents for details.

20

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

CERTIFICATE OF APPROVAL ISO9001

CLS-40E-7
2023. 04

Specifications are subject to change without prior notice.