General Purpose Pump Motor Bearing Protection Shaft Shields Bolt Circle Dia 5 7/8 in Duty Cycle Continuous Frame 56C Hz 60 Hz Full Load Amps 4.2/2.1 HP 1 1/2 Ins. Class B Length Less Shaft 10 3/8 in Max Ambient Temp 104 Degrees F Motor Application General Application Motor Bearings Ball Motor Design 3-Phase Motor Efficiency Group Standard Efficient Motor Enclosure Design Open Dripproof Motor Frame Material Steel