Assembly: F1 ONLY , Bearings: Ball , Duty: Continuous , Efficiency Group: Standard , Frame: 56C , Frame Material: Rolled Steel , Insulation Class: F , Length Less Shaft: 9 15/16" , Max. Ambient Temp.: 40 Degrees C , Motor Application: General Application , Motor Design: 3-Phase , Motor Enclosure Design: Totally Enclosed Fan-Cooled , Motor Mounting Position: All Angle , Motor Shaft Design: Keyed , Motor Thermal Protection: None , Nameplate RPM: 3450 , NEMA Design: B , Nominal Efficiency: 66% , Overall Length: 11 13/16" , Phase: 3 , Rotation: CW/CCW , RPM Group: 3001-3600 , RPM Range: 3001-3600 , Service Factor: 1.15 , Shaft Dia.: 5/8" , Shaft Length: 1.875" , Voltage: 208-230/460 , Warranty: 1 Years