Still messing with the tumbler. The worm drive gear motor I was going to use had a bad motor. I'm NOT rewinding that!
So, wanting to salvage the gear box, I pulled the motor and gearbox apart. Cleaned everything, and popped the rear cover of the motor open. Bored out that rear cover to take a bearing that I had on hand.
Then started working on the shaft. Had stripped the rotor off of it before the MN/WI trip, so started by turning it down where the rotor was (To true that up to the seal surface. Not sure why it wasn't true, but it was bent some. Then shortened the shaft, and turned to .600", and it part of it down to .5000". Next took a chunk of hot rolled, drilled and reamed to match the 1/2, Loctite 609, and a 1/8" cross pin pressed in. Reamed the cross pin about 3 tenths under, so needed the press and used some 609 also. That sucker isn't coming out!
Then threw the shaft back into the lathe, on the previously turned .600" diameter and trued it up. Then center drilled the extended shaft, cleaned up the hot rolled, and turned a stepped diameter 2-3 tenths over the bearing ID, with the lead in 5 tenths under.
And, I'm done for tonight. Will measure everything up again tomorrow sometime. Have to machine a flat on the extended 1/2" shaft and press the bearing in. Hopefully, if everything goes well, I'll have 1-1/4" of shaft extending past the end of the old motor housing. That can be coupled to a 1/3hp motor, and the gear box will be serviceable again.