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Translation of the original operating instruction (de)
1.
Safety instructions
These operating instructions for power clamps of series GN 864 / GN 865 / GN 866 are
intended for construction engineers and project developers of plants and machinery and
for installation and maintenance/service personnel.
1.1 Definition of cautions
Caution: Indicates a potentially hazardous situation. Failure to observe the safety
provisions can result in personal injury or damage to property.
1.2 General cautions
Caution: These operating instructions must be used for all assembly, dismantling
or repair work!
Caution: When in operation, power clamps of series GN 864 / GN 865 / GN 866
must be fitted with external safety devices protective guards, light barriers, etc.).
Caution: When closed, the power clamp generates a high clamping force which,
due to mechanical locking, is also kept up if the compressed air supply is disrupted.
1.3 Intended use, range of application
The pneumatically operated power clamps of series GN 864 / GN 865 / GN 866 are
designed for use in jigs and handling systems. They are used for clamping, holding,
gripping and positioning workpieces.
Caution: Before operating the power clamps (series GN 864 / GN 865 / GN 866)
make sure that the intended use with regard to the range of use (safety precautions,
trained and qualified personnel, compressed air supply) is complied with.
1.4 Product description
The power clamps GN 864 / GN 865 / GN 866 are made in the sizes 20, 32, 40 or 50.
The size refers to the piston diameter of the driving pneumatic cylinder. The clamp consists
of a pneumatic cylinder, a metal housing and various attachment options and one or two
clamping arms.
During clamping, the pneumatic cylinder acts as a servo unit on an integrated cam mech-
anism which triggers the swivel movement of the clamping arms. The rotary motion ends
with a mechanical locking action. Operating and switching state can be displayed via
external proximity switches.
2.
Safety
Caution: Power clamps are not fitted with their own safety devices. Jamming and
crushing hazard!
If defective, the power clamps must not be operated. Maintenance and service work
must be carried out with the machine at rest and without pressure applying. After
completing maintenance and service work, all protection devices must be in refitted
in proper working condition.
3.
Assembly and startup
The units are installed or attached using cylindrical screws and centering guide bushings
(Fig. 1). The clamp can also be mounted directly to the cylinder via collar clamps (Fig. 2).
The mounting contact surfaces must be plane and clean. All screws and bolts must be
tightened with the correct torque.
Fig. 1
The compressed air supply is connected to the power clamp using a suitable coupling.
The connection marked (+) closes the clamp, the connection marked (-) opens the clamp.
Caution: The power clamp has an integrated end position damper for the advance
stroke, but not for the return stroke. This is why the permissible clamping arm torque
must be maintained (see table). If the recommended values for the maximum clamp-
ing arm weight are exceeded, an adjustable end position damper must be used.
Type
GN 864 / GN 865 / GN 866
GN 864 / GN 865 / GN 866
GN 864 / GN 865 / GN 866
GN 864 / GN 865
Weight
GN 864-20-BI/BL
(kg)
2
1,5
1
0,5
0
50
75
100
length (mm)
Weight
GN 864-40-BI/BL
(kg)
3
2,5
2
1,5
1
0,5
0
50
75
100
Length (mm)
Cylinder Ø
20
32
40
50
125
150
175
125
150
175
Fig. 2
Maximum allowable
torque
1,00 Nm
1,25 Nm
1,50 Nm
3,00 Nm
Weight
GN 864-32-BI/BL
(kg)
2,5
2
1,5
1
0,5
0
50
75
100
Length (mm)
Weight
GN 864-50-BI/BL
(kg)
6
5
4
3
2
1
0
50
75
100
Length (mm)
125
150
175
125
150
175
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