US Motors Direct Drive Fan & Blower, 1/4 HP, 1-Phase, 1550 RPM MotorDirect Drive Fan Double ShaftShaded Pole5.0 Dia.Open Air Over (OAO)3-SpeedShaded PoleResilient BaseDouble ShaftProduct Specifications BRANDUS Motors MANUFACTURERS PART NUMBER1882 HORSEPOWER1/4 MOTOR RPM 60Hz1550 VOLTAGE230 PHASE1 ENCLOSURE TYPEOpen/Drip Proof HERTZ60 SPEEDS3 RATED RPM1550 MOUNTINGHub ring/Stud INSULATION CLASSB SERVICE FACTOR1 is_motorYes RPM RANGE1501-1700 EFFICIENCY TYPE62.7 Percent HERTZ (HZ)60 FL AMPS3.72