The Super-E line of electric motors features a shaft-grounding brush. They're available in 1 through 50 hp in totally enclosed fan cooled (TEFC) or open drip proof (ODP) foot-mounted designs along with ½ through 5 hp in TEFC, C-Face foot-mounted designs. The motor has a carbon brush mounted internally to divert shaft currents away from motor bearings, preventing voltage spikes from damaging the bearings and increasing the their life.
Baldor Electric Co., 5711 R.S. Boreham, Jr. St., Fort Smith, AR 72901, (479) 646-4711