Trusted and Proven NEMA frames available,Class F insulation with Class B Temperature Rise Design,High Efficiency, Long life motors,Heavy Duty, Ball Bearing NEMA 48 Fr,High Starting Torque, Low Noise Design,Powder Coated Body,ISO 9001:2000 Certified Plant,Models Available in 110V, 60hz,ISI Marked Models Available,Low Temperature Rise,Low Voltage Operation Upto 160V,Preferred by all Key Grinder Manufacturers