So my 645 has a Doerr 71308-A which is a 1ph/1hp 115/230. Motor runs great. Just got my garage wired for 230V and the motor has no diagram to rewire. I think I have it worked out but based off of other model # as the 71308 has no info online. I am also planning a VFD/motor upgrade down the road. The face is over 9" with a 7/8" shaft that is 2.5" long. These dimensions are not matching up with a 145TC or a 284TC, kind of a combination of both. Anyone have some insight?
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Doerr motor replacement.
- Thread starter Ripdog38
- Start date
- Joined
- Nov 26, 2018
- Messages
- 261
What is the RPM of the motor at 60Hz? If you are resourceful with machining you could match any vaguely compatible motors to this machine. My Harig surface grinder had a 440v 3phase motor which I swamped to a pool pump motor for electrical conveance. My 1440 lathe had the motor burn out, so I swamped the obscure metric framed and shafted to an imperial NEMA motor shaft and mounts of the same electrical configuration.
- Joined
- Nov 26, 2018
- Messages
- 261
By referring to" 9"+BC" you mean the size of capacitor housing and distance to flange? If so you can move the capacitor elsewhere with a stretch of new wires.
Motor face has a 9" bolt circle. the mill has a separate plate that joins the two so replacing the plate with one that fits a new motor wont be bad.
I finished rewiring the motor to 230v and rewiring the Drum switch which took a lot of trial and error.
I finished rewiring the motor to 230v and rewiring the Drum switch which took a lot of trial and error.