Baldor-reliance motor, 3hp,1750rpm,dc,215c,7544d,tefc,f1 features: tefc enclosure shunt wound class f insulation designed for use with nema type k scr control 20:1 constant torque speed range (except where noted) nema c-face and removable base (except on explosion proof models) base welded on type 3513d only nema 182 and larger have a thermostat (normally closed contracts) on the field winding no dual mounting base holes on 35d, 75d or 91d type typical applications: conveyors, printing, textile equipment, machine tools and other equipment requiring variable speeds with constant torque.