Lock Unit Replacement - SMC Networks C96N C Series Operation Manual

4-2. Lock unit replacement

C a u t i o n
①
Lock unit is replaceable. When ordering the lock unit
for maintenance, select the suitable lock referring to
the table below
 For lock unit with bellows, please add -J to the part number suffix.
Ex.) MWB50-UA-J
② Lock unit replacement
1) To release the lock state, screw-in the lock release
bolt to the body cap end or pressurize the lock release
port with 0.3MPa or more.
P≧0.3MPa
a) Lock released by
air pressure
2) Remove the lock unit holding bolt (hexagon socket head
cap screw) on the rod side of the cylinder with hexagon
wrench. Refer to the table below for the hexagon wrench.
If using the rod end nut, please remove it.
Bore size
(mm)
32
40・50
63
80
100
Rod end nut
Lock unit holding bolt
Lock release bolt
b) Manual lock release
Hexagon wrench size of
the lock holding bolt
3
5
6
8
10
3) Pull out the old lock unit from the cylinder.
Old lock unit
4) Insert a new lock unit into the cylinder. The lock unit for
maintenance is supplied with lock released state at the
shipment from the factory.
New lock unit
(Default:
Unlocked state)
5) Insert the lock unit holding bolt and tighten it temporarily.
Check that the piston rod operates smoothly by hand while
maintaining the lock release state.
6) Confirm that the operation of 5) is performed correctly, and
then tighten the lock unit holding bolt with an appropriate
tightening torque as shown in the table below.
Tube I. D.
(mm)
32
40・50
63
80
100
7) After assembly is completed, rotate the release bolt anti-
clockwise by hand with a hexagon wrench until resistance is
felt. Once that position is reached, rotate it for an additional
1/6th of a turn to securely tighten the release bolt.
Note) Please do not use an electric driver or pneumatic driver.
Lock release bolt
(Lock here)
Check that the cylinder is locked and confirm that the lock is
released when air pressure of 0.3MPa or more is applied to the
lock unit release port. In addition to this, the piston rod should
operate smoothly with the minimum operating pressure.
Check that there is no air leakage from the release bolt.
- 33 -
Appropriate tightening torque
of the lock unit holding bolt (N・m)
1.35 to 1.65
4.7 to 5.7
11.3 to 13.7
22.1 to 26.9
37.8 to 46.2