Mounting of hollow-shaft gear units

Due to the rigid connection between the machine shaft and the hollow shaft of the gear unit, constraining forces can be imposed on the output shaft bearing. Therefore, the following must be observed when mounting hollow-shaft gear units:

• For machine shafts without their own bearing or with only 1 bearing point, the gear unit is normally designed with foot or flange mounting and used as a bearing point. Make sure that the bearing is very well aligned coaxially to the existing bearing point.
• If the machine shaft has at least 2 bearing points, the gear unit should be connected merely to the machine shaft and supported with a torque arm. To avoid overdetermination of the bearing, gear units with foot or flange mounting should not be used.

Failure to comply with this requirement may damage the output shaft bearing and promote the formation of friction corrosion at the connection between the machine shaft and the hollow shaft of the gear unit.