Evaporative Cooler Motor Motor Type Capacitor-Start Enclosure Open Dripproof HP 1 1/3 Number of Speeds 2 Nameplate RPM 1725/1140 56Z Frame Voltage 115 60 Hz 1 Phase 12.1/7.1 Full Load Amps Mounting Ring Thermal Protection Auto Insulation Class B Service Factor 1 Bearings Ball Ambient Temperature 40â”C Rotation CWSE Length Less Shaft 8-21/25 In. Overall Length 10-24/25 In. Shaft Dia 5/8 In. Shaft Length 1-15/16 In. Ring Dia 2-1/2 In. Ring to Ring Center 8-7/16 In.