Appliance - Electric Motor

These motors run continuously for long periods under load and so generate high levels of heat. Furthermore they have to be as light as possible so designers often use light weight alloys and plastics components, even though this can result in differential thermal expansion problems. Tolerance Rings offer the ideal solution to thermal expansion problems as they provide a constant retention force over a wide temperature range and do not require a heavy interference fit that can distort the bearing race.

For cost reasons a plain bearing is often used on the
commutator end of the motor. Unfortunately this type of
bearing can not cope with angular misalignment of the
motor shaft so is unsuitable for many applications.
However, if a Tolerance Ring is used to retain the bearing
the assembly can then cope with misalignment of the
motor shaft and provide long bearing life.

Commutator Brushes
Eliminate set screw and risk of cracking or loosening
under vibration. Avoids use of glue and the associated
production costs.

Pre-fiited Bearing
Pre-fitted Tolerance Rings offer simplified handling and
assembly.

Click Here for an electric motor bearing mount competing solutions analysis table.