This Peerless Winsmith (formerly known as HK Porter) motor is used on the Bridgeport Knee Mill Series 1 for both the older and newer series of machine serial numbers.
It is a direct replacement for the Bridgeport Part Numbers:
BP 11630192 (older part number)
BP 12631614 (newer part number)
Magna Products also recommends replacing the Shaft Seal (Magna Part Number 400039) whenever replacing the motor.
You can find this motor and shaft seal normally in Magna stock and can ship today!
Magna can also repair your motor.