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, Models Available in 110V, 60hz, ISI Marked Models Available, Low Temperature Rise, Low Voltage Operation Upto 160V, Preferred by all Key Grinder Manufacturers.