Greetings to all:
I got this bench grinder that is supposed to be a Baldor. It has no nameplate but it "looks" like a Baldor. It has 12" diameter wheel guards so I assume it is a 10" grinder. The arbor is 3/4" which is odd because newer models have heftier arbors. Anyhow, this unit had the bearings shot and was making a very big buzz with no movement in the shaft. I replaced the bearings and cleaned the unit inside (centrifugal contacts etc.) and the unit is running now. However, if plugged to a 115v receptacle & after 2-3 seconds the breaker trips.
The guy I bought it from (I paid him $20 for it) did not know much about this unit but he guessed it was a 1 HP unit. It used to belong to a fabricating shop that had closed down. It had a 3 prong twist lock plug. From the NEMA chart pictures it could be a 115 or 230 volt plug. The motor does not have any wiring diagram or any other info on it. How do I tell if it is prewired for 230 v? It came with a 12AWG cord. Any leads will be appreciated.