GMT POWER OPERATED
PNEUMATIC FRONT END CHUCK:
Power Operated Pneumatic Front end
Chucks are designed to utilise in full, the
spindle bore for bar/pipe work. This design
avoids rear mounting of the actuating cylinder
and necessary draw bar connections. The
chuck can be mounted on the lathe spindle with
an adaptor flange as needed. The actuating
cylinder is built into the chuck. The stationary air
distribution system with the ports to supply air to
the respective sides of the piston is mounted
separately on the chuck.
These chucks are available in various sizes
ranging from size 160mm Ø to 1000 mm Ø. The
chucks are offered with standard jaw stroke of
4.2mm to 12mm and extended jaw stroke of
19mm to 25.4mm. The extended jaw stroke
to hold pipes, casings and tool joints.
For holding long oil pipes, one chuck is
mounted on the front end of the spindle, and
one chuck at the near end of the spindle.
Power Operated Pneumatic Front end
Chucks have twin non-return valves, which
prevent the clamping air from returning through
the port unless air is let in on the other side of
the piston. This ensures retention of clamping
force even when the air supply is switched off.
The maximum operating pressure of the chuck
is at 10 bar pressure.
Principle of Operation
Power Operated Pneumatic Front end
Chuck has two special rubber seal rings on the distributor assembly. The special seal ring is
compressed when the chuck is pneumatically
actuated to facilitate opening and closing of
chuck jaws. Once the job is clamped due to
venting of the air supply, the special seal rings
lift to ensure rotation of the chuck. This design
eliminates wear on the special seal rings.
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