IAI America RCS3PCR-SS8C - Manual (Page 64)

5. Installation
54
5.5 Tightening Screws
� The male screws for mounting the base should be M3 for SA4, M4 for SA5, M5 for SA6/SA7/SS7, and M8 for
SS8. (Use hexagon socket-head bolts).
� For the bolts, we recommend high strength bolts of ISO-10.9 or higher.
� When using a foot base to attach to a mounting table, use the special washer made for high strength bolts
that comes with the actuator if the bolt is M8 or larger. This is unnecessary for M6 or smaller bolts. Do not
use a common spring washer.
� The recommended tightening torque is given below.
Tightening Torque
Screw nominal
diameter
When the bolt seating surface is steel When the bolt seating surface is aluminum
M3 1.5 N�m (0.15 kgf�m) 0.8 N�m (0.08 kgf�m)
M4 3.6 N�m (0.37 kgf�m) 1.8 N�m (0.18 kgf�m)
M5 7.3 N�m (0.74 kgf�m) 3.4 N�m (0.35 kgf�m)
M8 30.0 N�m (3.05 kgf�m) 11.5 N�m (1.17 kgf�m)