Electrical Type: POLYPHASE HP: 20 KW: 14.9 RPM: 1182 Frame: 286T Enclosure: Drip Proof Phase: Three Voltage: 208-230/460 Rotation: Reversible Overload: None Material: Cast Iron Bearings Type: Ball / Ball Bearings SE Type: Ball Bearings OSE Type: Ball Mounting: Rigid Base Amperage: 60-54/27 Shaft Type: Keyed Shaft Extension: 4.620" Shaft Diameter: 1.875 Bearings DE Type: Ball Bearings ODE Type: Ball Meets or exceeds NEMA Premium® efficiency. Model is in compliance with EISA2058|Inverter duty 10:1 variable torque and 2:1 constant torque|1.15 Service Factor on sinewave, 1.0 Service Factor on IGBT power|Standard assembly F1, reversible to F2 assembly|Dual frame mounting holes|Will become build-up item when current stock is gone