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Maintenance and Inspection
Periodic inspection is necessary for optimum use. Generally, annual inspection is recommended
for the rotary actuator. Even if no problem is found, seal parts replacement is recommended every three
years. It is highly possible that the actuator is operated out of specification when the components like
shaft, pinion, rack, bearing are broken. Please revise the operating condition. In this case, please return
the broken actuator to SMC to repair.
Periodic inspection
Check followings for periodic inspection
(1) If the rotary actuator set screw become loose
(2) Operating state
(3) Leakage to outside
(4) Is not the backlash of the rack-and-pinion abnormally large?
If any items are found by the inspection that require repairing, tighten any loose parts or disassemble the
product to repair.
Disassembly procedure and assembly procedure
■
Disassembly procedure
1.
Loosen small pan-head screw
13
and remove the shaft from the main unit.
Also, remove bearing
9 from the housing.
2.
Loosen the hexagon socket head cap screw
11
and remove covers 2 . (Remove both the left and
right covers.)
3.
The piston will be visible inside main unit 1 . Push the piston from one side and remove piston
assembly 3 from the main unit. The rack has a specified mounting direction, so this should be
checked when removing it from the main unit. (If you install the rack in reverse when reassembling
the rotary actuator, the engagement between the gears will be imperfect, resulting in an error in the
swing range of the key groove.)
■
Assembly procedure
1.
Before assembling the rotary actuator, thoroughly wash each part to ensure that no dirt adheres to it.
2.
Coat each part with grease.
When installing the piston packing in the piston, be careful not to damage the packing.
3.
The letters R and L, which represent left and right, respectively, are marked on the inside of
covers 2 . First, install the left cover(L).
4.
Insert piston assembly 3 into the main unit, then push the piston until it strikes left cover(L) 2 .
At this time, the piston packing will pass through the bearing housing. Be sure, therefore, not to
damage the packing.
5.
Install bearing 9 in the housing of the main unit, and assemble the shaft so that the direction of
the key groove is the same as the direction of the right cover. If the key groove does not face the
right side, this means that rack is assembled in reverse. In this case, correctly assemble the rack.
6.
Install cover(R) 2 .
7.
After assembling the rotary actuator, perform an operating test and also check the actuator to ensure
that there is no air leakage.
Size
Tightening
torque
Additional
tightening torque
30
5.1N
･
m
4.7
～
5.7N
･
m
50
21.6N
･
m
17.6
～
26.4N
･
m
63
43.1N
･
m
35.2
～
50.8N
･
m
80
75.5N
･
m
61.6
～
92.4N
･
m
100
Size
Tightening torque
30
0.68N
･
m
50
1.4
～
1.8N
･
m
63
80
100
Tightening torque for the cover
②
(L)(R) and
hexagon socket head cap screw
⑪
.
Tightening torque for bearing retainer
⑤
and
pan head machine screw
⑬
.
2020-10-13 10:33
DI987004
