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Translation of the original operating instructions (de)
1.
Safety instructions
These operating instructions for pneumatic fastening clamps of series GN 864/865/866 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, pneumatic fastening clamps of series
GN 864/865/866 must be fitted with external safety devices (protective guards,
light barriers, etc.).
Caution: When closed, the Pneumatic fastening 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 pneumatic fastening clamps of series GN 864/865/866 are
designed for use in jigs and handling systems. They are used for clamping, holding, grip-
ping and positioning workpieces.
Caution: Before operating the pneumatic fastening clamps (series GN 864/865/866)
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 pneumatic fastening clamps GN 864/865/866 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: Pneumatic fastening clamps are not fitted with their own safety devices.
Jamming and crushing hazard!
If defective, the pneumatic fastening 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 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 pneumatic fastening clamp using a suitable
coupling. The connection marked (+) closes the clamp, the connection marked (-) opens
the clamp.
Caution: The pneumatic fastening clamp has an integrated end position damper for
the advance stroke, but not for the return stroke. This is why the permissible clamp-
ing arm torque must be maintained (see Table). If the recommended values for the
maximum clamping arm weight are exceeded, an adjustable end position damper
must be used.
Type
864/865/866
864/865/866
864/865/866
864/865
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
7
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