I don’t have the motor nearby to see if it has a name on it, but when I hooked a control to it and plugged it in it went to arcin’ and sparkin’, but it did run. If I remember correctly, the brush tube on one side was broken. It’s not original to the machine, as can be seen by the hose clamp that attaches it to the bracket. It also had a really obnoxious-looking open-wire rheostat wired to it when I got it, and I promptly removed it and put that thing in the bottom of a drawer someplace where I thought that I wouldn’t ever find it again and be tempted to use it. I didn’t even take a photo of it. It’s that dangerous-looking.
Maybe the mis-fit of the household flywheel on the industrial stand that you mentioned was the cause for the noise that my friend in Arkansas experienced with her small flywheel re-fit.
CD in Oklahoma