Nidec U3V3BC - The Definite Purpose TEFC Hostile Duty motor is designed for demanding applications requiring variable and constant torque. It features INVERTER GRADE® insulation, class F thermostats, and a cast iron frame with corrosion-resistant paint. The motor has a shaft slinger for protection, operates at a 40°C ambient temperature, and has regreasable bearings and lifting provisions. Double shielded bearings are used in certain frame sizes. It has a premium efficient design, class H insulation, and various conversion kits available. This motor is suitable for pumps, fans, blowers, and other inverter-powered applications with variable torque requirements and a speed range of 20:1 or less.