Electrical Type: POLYPHASE HP: 15 KW: 11.2 RPM: 1185 Frame: 284T Enclosure: Totally Enclosed Fan Cooled 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: 44-41/20.5 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 EISA2148|Inverter duty 10:1 variable torque and 10:1 constant torque|1.15 Service Factor on sinewave, 1.0 Service Factor on IGBT power|Standard assembly F1, reversible to F2 assembly