Reducing the mass moment of inertia to the motor shaft

The reduction to the motor speed is calculated using the following formula:

JLx	Load moment of inertia reduced to the motor shaft	[JLx] = kgm2
JL	Mass moment of inertia with reference to the output speed of the gear unit	[JL] = kgm2
iG	Gear unit ratio

Service factors f_{B_L} > 1.8 may be required with large mass acceleration factors (> 10), high levels of backlash in the transmission elements, or large overhung loads. Consult SEW‑EURODRIVE in these cases.