toolie said: got the motor back from the repair shop
That motor is hurt. Yes, those are weld spots, broken, but once welded. Arc welding on a motor can arc pit the bearings making them go bad rather quickly.
the key has been punched on the end to keep it in.
It may be that you'll need both a new motor and a new motor pulley. That will be the path of least resistance.
I hope the thing can be repaired by your machine shop guys.
Keep in focus where you're going with this project: a Unisaw in good working condition. The fact that you'll have to spend more money than your original investment is an emotional defeat, but losing having a unisaw in your shop because of this potential expense may be a defeat of greater magnitude. I'll usually figure a used Unisaw will need about $700.00 plus the cost of the saw to get it up to where I'd want it. If you end up having a grand or so in the saw and have a good working Unisaw, you're still good. It'll beat the heck out of this Shiny from Chiney stuff that's available new.