IAI America IX-NSN6016H - Manual (Page 90)

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9. How to Install
For the hexagonal socket head bolts, use high-strength bolts of ISO10.9 or higher.
x Be sure to use washers. If not, the bearing surface may cave in.
x Tighten the hexagonal socket head bolts securely to the correct torque. If not, precision may drop and in the
worst case the robot may topple and cause an accident.
Caution Warning