Hey ya'll. Anybody ever use jb weld or similar epoxy to repair electric motor shafts? I pulled this armature to replace bearings and found this pitted section where the front bearing was sitting. The strangest part is the inside race of the bearing didn't show any sign of wear... anyway, i've been told you can apply jb weld then take off the excess once dried and it should work for awhile. Anyone try this?
>>1085326
Can you use a torch on it? I would try to silver solder it before I tried an epoxy.
spray metallize that motherfucker
https://www.youtube.com/watch?v=6e-Ejj62LSE
i don't think jbweld will hold up
normally they just turn it down and press fit a stainless sleeve on there
It's been said but I want to emphasise that the best solution is to turn down the diameter and install a sleeve. Gonna get more life from the shaft that way. Also, was there some sort of compound between the bearing and the shaft? I'm no metallurgist but to me that looks like some kind of corrosion. The fact it wasn't on the inner race of the bearing suggests to me it isn't wear. Possibly a chemical reacting with the shaft material which the bearing material was non reactive with.
>>1085336
>Also, was there some sort of compound between the bearing and the shaft?
That's kind of what I was guessing.
>>1085342
Well if you wanted to know what it was and not how to fix it you should of asked phamalam.
Its where the bearing and the shaft where shorting out on each other. Thousands of tiny lightning strikes..
Probaby been fixed or a new bearing was just slapped on there.. But to me that looks like arching from electricity.
Brass shim it and epoxy for a short repair or have it re metalled and turned for a long term fix
>>1085364
>But to me that looks like arching from electricity.
Possible. If the motor is driven by a variable frequency drive. Or if it's a wound rotor (universal motor, etc.) with insulation failure in the rotor winding.
>>1085364
>Arcing
Doubt it. Bearings are usually held on with more force then home outlets are usually wired with. Also, it's extremely common for people to spray harsh chemicals onto bearings. ALSO, this looks like pitting from hard water, but this is irrelevant, just like electrical pitting.