Allen-Bradley MPAI-A C Series Installation Instructions Manual page 54

MP-Series Heavy-duty Electric Cylinders
Install the Anti-rotation Option
These are the recommended tools: 4, 5, 6, and 10 mm hex keys (Allen wrenches), small dead
blow hammer.
ATTENTION: Improper alignment of the Anti-rotation shaft can result in binding and or side
loading that can reduce the life of the actuator.
ATTENTION: Take precautions to not cause damage to the actuator's grease Zerk fitting
throughout the following process.
ATTENTION: This procedure requires you to rotate the thrust rod. Rotating the thrust rod causes
the factory set home position to be lost and require the electric cylinder be homed before its initial
use.
1. Assemble the anti-rotation shaft fastener into the anti-rotation clamp finger-tight, then
back off one turn.
2. Assemble the anti-rotation clamp on to the rod end, orientated such that the shallow
counter-bore faces the non-working end of the actuator and the clamp's opening
straddles the grease Zerk fitting.
3. Engage the flats of the anti-rotation clamp with the flats of the rod end.
Light tapping with a dead-blow hammer can be necessary to seat the anti-rotation clamp
against the thrust tube.
4. Torque the anti-rotation shaft fastener to 7.8 N•m (5.8 lb•ft) while making sure the
anti-rotate clamp does not shift.
5. Apply medium strength thread-locker to the two bearing block fasteners.
6. Assemble the bearing block on to the actuator finger-tight only by using the two
fasteners and two washers, oriented such that the bearing block does not breech the face
of the actuator.
7. Insert the anti-rotation shaft through the bearing block, orientated with the shaft's
tapped hole facing the working end of the actuator.
8. Light tapping with the dead-blow hammer can be necessary to get the anti-rotation shaft
through the oil wick of the bearing block.
9. Manually rotate the thrust rod to retract the actuator as far as the application allows
without mechanically stopping or striking any mounting means.
10. Verify that the bearing block fasteners are just finger-tight allowing the bearing block to
float.
11. Align the shallow counter-bore of the anti-rotation clamp with the anti-rotation shaft,
engage the shaft into the counter-bore.
54 Rockwell Automation Publication MPAI-IN001F-EN-P - January 2016