Electric Motor Repair

Motor rewinds and rebuilds typically call for replacement bearings at both the drive end and the fan end, where the two positions may differ in type, shield or clearance. Heat, shaft currents and continuous running make the full bearing designation as important as the basic series number. Repair shop managers need the correct reference and quantity for each position so that the rebuilt motor goes back into service without rework.

• Record the complete FAG designation from the old bearing, including seal, shield and clearance suffixes such as C3, not just the base series number.
• List the drive-end and fan-end bearings separately, with a quantity for each position, rather than one combined total.
• Confirm the locating and floating arrangement before replacing a bearing, especially where a cylindrical roller bearing is fitted at the drive end.
• Put any insulated bearing or other electrical requirement in the written enquiry, with the exact designation, for motors exposed to shaft currents.