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1. Do not open the cushion valve more than the
allowable number of rotations (following table).
Although the cushion valve is caulked as a retaining
mechanism, do not open the cushion valve more than the
allowable number of rotations. If air is supplied and operation
started without confirming the above condition, the cushion
valve may be ejected from the cover.
The allowable number of rotations refers to the number of
rotations until the restrictor of the cushion valve is completely
opened from the completely closed state.
2. Keep the screwing torque and the unscrewing
torque of the cushion valve to the allowable torque
or below (following table).
If a screwing torque or unscrewing torque beyond the
allowable torque is applied, the valve will be damaged when
the valve is closed completely or exceeds the retaining
mechanism when the valve is opened completely, which will
dislocate the engagement of the screw and eject the valve.
Bore size
(mm)
Cushion valve
width across flats
Hexagon
wrench
Allowable number
of rotations
Allowable torque
(N·m)
32, 40
2
JIS 4648
Hexagon wrench key 2
4
0.02
50, 63
2
JIS 4648
Hexagon wrench key 2
4.5
0.02
80, 100
3
JIS 4648
Hexagon wrench key 3
5.5
0.06
3. Be certain to activate the air cushion at the stroke
end.
When the air cushion is inactivated, if the allowable kinetic
energy exceeds the value on page 5, the piston rod assembly
or the tie-rod may be damaged. Set the air cushion to valid
when operating the cylinder.
1. When replacing brackets, use the hexagon
wrenches shown below.
Bore size (mm)
Width across flats
Tightening torque (N·m)
32, 40
4
4.8
50, 63
5
10.4
80, 100
6
18.2
Warning
Caution
Adjustment
22
Series
C96
Specific Product Precautions
Be sure to read this before handling. Refer to the back cover for Safety Instructions.
For Actuator and Auto Switch Precautions, refer to “Handling Precautions for SMC
Products” and the Operation Manual on SMC website, http://www.smcworld.com