Motor encoder units are typically mounted with an interference fit on the shaft. They can be pressed onto the shaft. The mounting force should be applied via a mounting sleeve or dolly abutting the inner ring side face (fig. 1).
To facilitate mounting, the bearing inner ring can be heated. Heating should only be done with a temperature-controlled electric hotplate. The bearing should be placed on a mandrel to effectively heat the inner ring (fig. 2). The seal should be placed in the lower position to avoid grease leaking out of the bearing. Induction heaters should not be used to heat motor encoder units as damage to the electronic components may result.
SKF does not recommend heating a motor encoder unit above 80 °C (175 °F).
When motor encoder units have to be mounted into a housing with an interference fit, they can be pressed into the housing or the housing should be heated. The mounting force should be applied via a mounting sleeve or dolly abutting the outer ring side face or a snap ring fitted on the outer ring (fig. 3).
In typical electric motor applications, the bearing can be moved into position by using bolts to pull the motor shield and cover together (fig. 4).