OUTLINE OF SYSTEMS C-9
4.7 Setting the Chucking Pressure
The chucking pressure can be increased up to the main pressure of the hydraulic system.
However, the chucking pressure value should be smaller than the maximum pressure allowed for
the chuck or the cylinder, whichever is lower.
For the allowable cylinder thrust (allowable plunger thrust) and the allowable maximum hydraulic
pressure that may be applied to the cylinder, refer to the instruction manuals supplied by the
manufacturer of the chuck and cylinder.
(1) Set the chucking pressure in accordance with the workpiece shape and cutting
conditions. If pipe material is chucked at high pressure, it may be deformed.
(2) Even if the same hydraulic pressure is applied to the chuck, the chuck gripping
force varies according to the manufacturer and type of the chuck and cylinder.
Example) Kitagawa hollow chuck
The values given above are for reference only.
For the relationship between the chucking pressure and the cylinder thrust for the chuck
actually used, refer to the instruction manual supplied by the chuck manufacturer.
WARNING
If a force exceeding the allowable cylinder thrust is applied to the chuck,
the components or bolts of the chuck will be damaged and chuck gripping
force will be lost. If such troubles occurs during spindle rotation, a jaw or
the workpiece will detach from the chuck, injuring the operator or
damaging the machine.
CAUTION
S2091
S1875
S1552
S1246
0 1.0 2.0 2.9 3.9
88.3
78.5
68.6
58.8
49.0
39.2
29.4
19.6
9.81
Oil Pressure (MPa (psi))
Cylinder Thrust (kN (lbf))
NOTE
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