Motor units Repairs
44 Product Manual IRB 640
8.2 Checking brake performance
Axis Motor Static brake Gear reduction
torque (Nm) ratio
Min.
1/2/3 3HAB 8278-1 22 185
6 3HAB 5762-1 6 81
A check on the static brake torque for each motor unit can be done by applying a load
on the moving arm or on the turning disc in some suitable way. When calculating the
brake torque, the arm and gear reduction ratio must be taken into consideration. The
coefficient of efficiency for the gear is assumed to be 1.0.
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