Chuck Structure - Bison 2500 Instruction Manual

3. CHUCK STRUCTURE

The power chuck consists of a high alloy steel body where the pneumatic cylinder connected with a drawbar
and three master jaws is mounted. The jaws are adapted for mounting of special hard top jaws. The jaw serration
is equal to 3/32'' x 90°. Plain back mounting with clamping from the front. Power supply of the chuck through
a stationary (fixed) air distributor ring mounted on the adapter plate side.
Built-in double-acting pneumatic cylinder use the force of the air pressure, moving the drawbar connected with jaws.
The axial force of the drawbar is transferred to the jaws through the two-angle wedge system. The air is transmitted to
the cylinder through a distrubutor ring (at stopped spindle). A non-return valve maintains a constant pressure flow in the
piston chamber in case of supply pressure drop.
Chuck structure type 2500
S 1 : 2
L16
L14
L15
A
A-A (1 : 2)
L17
L5
L7
S
L8
A
L9
L18
L18
L1
L6
G3/8''
3/32'' x 90
L13
L2
2500-400-140
L11
Fig. 1
5