Fasco, Type U185B1, 
P/m 7185-0114, Envirotec p/n PM-02-0012
1/6 HP, 120V, 1350-1200-1000 RPM, 3 Speed, CCWLE, Frame 42, Double Shaft, Resilient Base, AC Fan Motor.
The shaft is 8 1/4" long on both sides, slotted, 1/2" in diameter.
The motor was taken off unused discontinued unit.