Bearing deterioration creates shaft misalignment, vibration and electrical discharge paths — all of which can accelerate winding deterioration. Early detection of bearing wear saves both bearings and windings from collateral damage.
Contaminated lubrication, misalignment, overload and electrical currents through bearings cause pitting, noise and increased vibration. Regular bearing checks should be part of any motor preventive program.
When bearings damage windings, a rewind is often necessary. The rewind should be accompanied by bearing replacement, shaft inspection and dynamic balancing to return the motor to service confidently.
Workshops that perform combined mechanical and electrical repairs reduce repeat failures. For professional inspection, balancing and rewinds, see Rotating Electrics.