IAI America RCA2-SD4N - Manual (Page 61)

8. Installation
53
8.3.2 Installation of Detent
The short types (nut affixing types) have no detent on the rod.
If you are using the RP3NA, RP3N (Lead screw, ball screw), RP4NA, RP4N (Lead screw, ball
screw) without guide, install a detent, if necessary, by referring to the figure below.
Tip-bracket mounting hole
Detent
Actuator mounting hole
Actuator mounting plate
Caution : If you hear any abnormal noise from the actuator or find the grease on the screw
darker within several weeks after the start of operation, the coaxiality or parallelism
between the actuator mounting hole in the actuator mounting plate and tip-bracket
mounting hole in the guide-side bracket may not be appropriate. Make sure the
coaxiality is within 0.05 and parallelism, within 0.02. Wipe off darkened grease and
apply new grease. [Refer to 12.6, “Greasing”.]