Suggested replacement motor:  McMillan Industrial de Motor P1000-B4. Wall mount fan Motor.
Model AX series shutter mounted exhaust fan motors. AX8-3, AX10-3, S8-B2, S10-B2 Industrial, Commercial and Farming application.
 
Horsepower : 1/20
Voltage : 115
Amps : 1.70
RPM : 1600/2speed
Frequency : 60 Hz
Length : 2-7/8”, Conduit Box
Enclosure : Totally Enclosed
Shaft Dim. : 5/16” x 1-3/4”
Type : Shaded Pole
Diameter :3.3”
Bearings : Ball
Rotation : CWSE
Protector : Thermally Protected
Service Factor : 1.00
Phase :1
Ambient Temp. : 40°C