New
Hydraulic Piston Clamp for Press Machine

Swing Rod Clamp for Upper Die
Withstand Vibration of High-Speed Press

SlideDieMod e lGH A

For Press Machine

Hydraulic Piston Clamp

Swing Rod Clamp for Upper Die
Mode lGHA

The rod swings away during die change.
Swing Rod Clamp for Upper Die to Withstand Vibration of High-Speed Press

Features

Swing Rod Clampfor Upper Die

Top View
Slide

Withstands vibration

Process A

Process B

In case of Die 1

of high-speed press

LOCK

even in a released state

LOCK

LOCK

LOCK

Process A
In case of Die 2

Sometimes a transfer press machine is operated withsome clamps released depending on the number ofprocesses. Kosmek Swing Rod Clamp is able to withstandRELEASELOCKLOCKRELEASE

the vibration of the press machine even in a released state.

In case of Die 2, clamps can be in a released state during production.

Stopper to hold

RELEASE HYD.

Without the stopper, a rod isStopper

clamp rod steadyunsteady due to vibration

Fixes the clamp rodof press operation.

securely at release end.

in a released state
The released clamp rod is securely fixed by the stopper.
This prevents chattering of a limit switch caused bySlidevibration during press operation.
Clamp Rod(Released State)

1

Without Stopper

DieModel No.
Indication

ActionDescription

Features

External
Dimensions

Specifications

Cautions

In case a clamp rod is not ﬁxed in a released state...
Rod is unsteady due

Causes chattering

Leads to interlock

Causes unnecessary

to vibration of press.

of limit switch...

malfunctions...

machine stops...

For Stable

UNS

Production

TEA

DY..

Slide

Limit switch turns ON and OFF repeatedly due to.

a clamp rod moved by vibration at every shot.

Clamp RodIn case of GHA Clamp with a clamp rod ﬁxed even in a released state !

Stable production is possible bypreventing interlock malfunctions
caused by chattering of a limit switch.

Rod keeps its position

No malfunctions

No machine stops

Enableseven under vibration.

of limit switch

due to malfunction

Stable Production !

FIXE

D!

Action Description
Release Pressure ：ON
Lock Pressure：OFF

ReleaseLimit
SwitchRelease Pressure ：OFF
Lock Pressure
：ON

Lock

Release Side ：ON
Lock Side ：OFF

Release Side ：OFF
Lock Side ：OFF

Limit
SwitchLimit
SwitchRelease Side ：OFF
Lock Side ：ON

Clamp Rod

Bottom of Slide

SlideDie

There is no interference during die change
because the rod is kept above the bottomof the slide. The clamp rod is securely fixed
so it withstands vibration of press machine.

The clamp rod swings 70°
from a released position.

The die is clamped by the clamp
rod after swing.

Circuit Example
Hydraulic Unit
Circuit Symbol：PP

A Double Solenoid Valve① ②BA

Upper Die
GHA Clamp
B：Release PortBA
Non-Leak Valve
JBA
Pressure Switch④②B③

AB Pump
PA Port⑤

A：Lock Port

Hydraulic Unit
Please refer to product catalogs on our website for details about hydraulic unit.
Hydraulic Unit

Hydraulic Unit

2ℓ Tank

5ℓ Tank

Model CP/CR

Model CPB/CPD/CPC/CPE

http://www.kosmek.co.jp/php̲ﬁle/eng̲product̲page.php?no=025̲00̲01&lang=2

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Hydraulic Piston Clamp

Swing Rod Clamp for Upper Diem od e l G H A

Model No. Indication

GH A 025 0 - 70 - 5 0 - V
123

4

1 Clamping Force025 ：25 kN
040 ：40 kN
063 ：63 kN

2 Design No.
0 ：Revision Number

3 Die Clamping Thickness (Dimension h)※150 : Die Clamping Thickness (Dimension h) = 50 mm〜

180 : Die Clamping Thickness (Dimension h) = 180 mm
Note :※1. Selectable 3 Die Clamping Thickness (Dimension h) differs depending on 1 Clamping Force.
Please select from dimension h on the external dimension list.

4 Options
Blank ： Standard※2
N ： NPT Port

V： High Temperature (0 ~ 120℃)※3

Notes :
※2. Dimensions in the specification sheet and other documents are in inches.
Only die clamping thickness is indicated by the symbol in millimeters.
※3. Select the hydraulic unit with pressure relief valve when using under high temperature since there may be pressure fluctuation
caused by temperature change.

Specifications
Model No.
Clamping Force (at 25MPa)

GHA0250

GHA0400

25406317.6

3149.569.6

kN

Cylinder Capacity When Locked
cm3 When Released

4.3

Working Pressure

MPa

25

Withstanding Pressure

MPa

37

Full Strokemm

8Clamp Strokemm

5

Extra Strokemm

GHA0630

3

Swing Angle ※470°

Operating Temperature ※5

0 ~ 70 (V：High temperature option is available for 0 ~ 120℃)℃Use Frequency ※620 Cycles / Day or lessUsable Fluid ※7 ※8 ※9General Hydraulic Oil Equivalent to ISO-VG-32

Notes :
※4. Please contact us for other swing angles (70°or less).
※5. Option V：High Temperature (0~120℃) is for operating in temperatures of 70°or more.
※6. Please contact us for more frequent use.
※7. Please contact us for fluids other than those mentioned on the list.
※8. If hydraulic viscosity is higher than specified, action time will be longer.
※9. If using it at low temperature, action time will be longer because the viscosity of hydraulic oil becomes higher.
1. For excessive operating speed, make sure to release air in a circuit and install a speed controller (meter-in).

Switch Specifications
Model No.

D2VW-01L2A-1M-0
OMRON

Manufacturer

0.1A-AC125V

Electrical Rating
Cable Length3

0.1A-DC30V
m1

ActionDescription

Features

Model No.
Indication

External
Dimensions

Specifications

Cautions

External Dimensions※ This drawing shows the locked state of the standard model.
Please contact us for external dimensions of options.

G2-M8×1.25 Eye Bolt
(GHA0630 only)(J)
Cable Port

Release Port

Spiral TubeKN.C (Red)N.O (Blue)
COM (Black)

Lock PortM

2-CableD

Lock Conﬁrmation Switch
Swing Conﬁrmation Switch
L

4-Mounting Bolt
Spring Lock Washer(Included)
W ThreadNX

φAExtra Stroke

Die ClampingThickness
hQ

VP

E

F

8

Full Stroke

5

Clamp StrokeC

3

U-Cut°

70

N

φB
R
Y

Mold End Surface Range

SU

4-Mounting Bolt, Spring Washer

T

External Dimension List

(Prepared by Customer)(mm)

Model No.

GHA0250

GHA0400

GHA0630

A

182228B405060C

202530

D188

216

253

E

38.5

47.5

59

F30

32.5

37.5G78.2

96.2

119.2

J

12.8

13.8

16.8

K36.5

4557

L

121.5

144

165.5

M

32.5

3743.5

N202025

P

101515Q

131316.5

R

50

6575

S102

125

150

T

119142

170

U

22.2

20.2

18.2

V

141619W

M8×1.25

M8×1.25

M10×1.5X

3.8 ~ 27.8

5.2 ~ 32.6

10.5 ~ 44.7

Y

138.1 ~ 203.9

164.8 ~ 240

205.8 ~ 299.7
80 ~ 180h

50 ~ 120

60 ~ 140

Mold End Surface Range

107.5

7.5

Mounting Bolt

M8×1.25×20

M8×1.25×20

M10×1.5×25

Lock Port

Rc1/8

Rc1/4

Rc1/4

Release Port

Rc1/8

Rc1/4

Rc1/4

U-Cut

24323871018

WeightkgP

Please align the slide end surface andthe cylinder end surface on the same line.
Or, place it where the clamp rod does nottouch the slide during release operation.

4Cautions

m od e l G H A

Cautions● Notes for Design● Installation Notes

1) Check Speciﬁcations

1) Check the Usable Fluid● Please use the product according to the speciﬁcations.

● Please use the appropriate ﬂuid by referring to the Hydraulic Fluid List.

● Operating hydraulic pressure is 25MPa.

● If viscosity grade of hydraulic oil is higher than ISO-VG-32,

Do not exceed the speciﬁed operating hydraulic pressure.
Failure to do so may result in damage on the product, falling of a die
and an injury. In order to reduce clamping force, use the product withaction time becomes longer.
● If using it at low temperature, action time will be longer because
the viscosity of hydraulic oil becomes higher.

lower operating pressure.
2) Procedure before Piping
2) Check Die Clamping Thickness● Please check the die clamping thickness.

● Pipelines, piping connectors and others should be cleaned bythorough ﬂushing.

Using dies other than speciﬁed causes locking malfunction of die

Dust and cutting chips in the circuit may lead to ﬂuid leakage

clamp leading to falling of a die and an injury.

and malfunction. (There is no ﬁlter that prevents contamination.)

3) Die clamping surface must be parallel with die mounting surface.

3) Applying Sealing Tape

● If a clamping surface is not even or parallel, excessive force will be● Wrap with tape 1 to 2 times following the screw direction.

applied to the clamp, deforming the clamp body, lever and pins.

Pieces of the sealing tape can lead to oil leakage and malfunction.

This causes falling of clamp and die leading to an injury.

Please implement piping construction in a clear environment toprevent anything getting in products.

4) Make sure that dust, sand, cutting chips or blank pieces do notenter the clamp.
● Clamp does not operate smoothly and may be damaged.

4) Air Bleeding of the Hydraulic Circuit● If the hydraulic circuit has excessive air, the action time may become
very long. If air enters the circuit after connecting the hydraulic port
or under the condition of no air in the oil tank, please performthe following steps.
① Reduce hydraulic pressure to less than 2MPa.
② Loosen the cap nut of pipe ﬁtting closest to the clamp by one full turn.
③ Shake the pipeline to loosen the outlet of pipe ﬁtting.
Hydraulic ﬂuid mixed with air comes out.
④ Tighten the cap nut after bleeding.
⑤ It is more eﬀective to release air at the highest point inside
the circuit or at the end of the circuit.
5) Checking Looseness and Retightening● At the beginning of the machine installation, the bolt and nut may
be tightened lightly. Check the looseness and re-tighten as required.
6) Installation of the Product● Use hexagonal socket bolts and tighten them with the following torque.
Model No.

Thread Size

Tightening Torque (N･m)

GHA0250

M825

GHA0400

M825

GHA0630

M1050● Hydraulic Fluid List
ISO Viscosity Grade ISO-VG-32

Maker
Showa Shell Sekiyu
Idemitsu Kosan

Anti-Wear Hydraulic Oil Multi-Purpose Hydraulic OilTellus S2 M 32

Morlina S2 B 32

Daphne Hydraulic Fluid 32 Daphne Super Multi Oil 32

JX Nippon Oil & Energy

Super Hyrando 32

Super Mulpus DX 32

Cosmo Oil

Cosmo Hydro AW32

Cosmo New Mighty Super 32

ExxonMobil

Mobil DTE 24

Mobil DTE 24 Light

Matsumura Oil

Hydol AW-32

CastrolHyspin AWS 32

Note : Please contact manufacturers when customers require products in the list above.

5Features

ActionDescription

Model No.
Indication

Specifications

External
Dimensions

Cautions● Notes on Handling● Maintenance and Inspection

1) Shutting down of the machine should be done without load

1) Removal of the Product and Shut-oﬀ of Pressure Sourceapplied to the clamp.
● Failure to do so results in a die fall and an injury.
● For press machine use, make sure to stop the slide at bottom
dead point.

● Before removing the product, make sure that safety devices
are in place. Shut oﬀ the pressure and power source, and makesure no pressure exists in the air and hydraulic circuits.
● Make sure there is no abnormality in the bolts and respective
parts before restarting.

2) It should be operated by qualiﬁed personnel.
● Hydraulic products, machines and devices should be operated
and maintained by qualiﬁed personnel.
3) Do not operate or remove the product unless the safety protocols

2) Regularly clean the area around the product.
● If it is used when the surface is contaminated with dirt, it may
lead to packing seal damage, malfunctioning and ﬂuid leakage.

are ensured.
① The machine and equipment can only be inspected or preparedwhen it is conﬁrmed that the safety devices are in place.
② Before removing the product, make sure that the above-mentioned
safety devices are in place. Shut oﬀ the pressure and power source,
and make sure no pressure exists in the hydraulic circuits.
③ After stopping the product, do not remove until the temperaturedrops.
④ Make sure there is no abnormality in the bolts and respective parts

3) If disconnecting by couplers, air bleeding should be carried out
on a regular basis to avoid air mixed in the circuit.
4) Regularly tighten pipe line, mounting bolt, nut, snap ring, cylinderand others to ensure proper use.

before restarting the machine or equipment.
5) Make sure the hydraulic ﬂuid has not deteriorated.
4) Do not touch a clamp (cylinder) while it is working.
Otherwise, your hands may be injured due to clinching.

6) Make sure there is a smooth action without an irregular noise.
● Especially when it is restarted after left unused for a long period,
make sure it can be operated correctly.
7) The products should be stored in the cool and dark place
without direct sunshine or moisture.
8) Please contact us for overhaul and repair.

5) Hold the clamp body when moving and removing the clamp.
● Pulling on hydraulic hose or air tube leads to a clamp fall and an injury.
Also, rivet part of the hose will be loosened leading to ﬂuid leakage.
6) Do not disassemble or modify.
● If the product is taken apart or modiﬁed, the warranty will bevoided even within the warranty period.
7) Do not pour water or oil over the product.
● Failure to do so causes malfunctions and deterioration of the productleading to an accident.

● Warranty1) Warranty Period● The product warranty period is 18 months from shipment fromour factory or 12 months from initial use, whichever is earlier.
2) Warranty Scope● If the product is damaged or malfunctions during the warranty
period due to faulty design, materials or workmanship, we will
replace or repair the defective part at our expense.
Defects or failures caused by the following are not covered.
① If the stipulated maintenance and inspection are not carried out.
② If the product is used while it is not suitable for use based on
the operatorʼs judgment, resulting in defect.
③ If it is used or operated in an inappropriate way by the operator.
(Including damage caused by the misconduct of the third party.)④ If the defect is caused by reasons other than our responsibility.
⑤ If repair or modiﬁcations are carried out by anyone other than Kosmek,
or without our approval and conﬁrmation, it will void warranty.
⑥ Other caused by natural disasters or calamities not attributable toour company.
⑦ Parts or replacement expenses due to parts consumption and deterioration.
(Such as rubber, plastic, seal material and some electric components.)
Damages excluding from direct result of a product defect shall be
excluded from the warranty.

6KOSMEK Products for Press Machines
Application examples with press machine related
KOSMEK products are available on our website.

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For further information of other products,
please order the complete catalog from our website.

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KOSMEK LTD.
HEAD OFFICE

United States of America
SUBSIDIARYKOSMEK (USA) LTD.
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CAT.NO. SBR-GHA001-01-G1B̲R02
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1-5, 2-chome, Murotani, Nishi-ku, Kobe-city, Hyogo, Japan 651-2241
TEL.+81-78-991-5162
FAX.+81-78-991-8787■ For Further Information on Unlisted Specifications and Sizes, Please call us.
■ Specifications in this Leaflet are Subject to Change without Notice.

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