My slow speed diamond disc lapping machine, the beginning

[Harry Knutz]

I'm not really given to conspiracy thinking, but the one thing whose price has remained pretty level is liquor. I admit, that makes me suspicious.

As to the motor, there isn't much to tell at this point. It's a standard induction motor of some unknown horsepower that may or may not be wired for 110V operation, with about a 5/8" shaft. The data plate is all scuffed off, and it has a bunch of wires hanging off of it, and a giant capacitor that is attached to one, but not two wires. The first puzzle is figuring out which other wire attaches to the capacitor.

A buddy of mine just showed up at random and handed it to me yesterday.

View attachment 417333

That looks a lot like a swamp cooler motor?

 

[Janderso]

Thanks again. As for the speed, my (potentially flawed) plan is to use a DC motor to drive a belt coupled grinder arbor.

I don't know if you are still looking for a motor??
Check out surpluscenter.com

Surplus Center

Warehouse distributor for many top name manufacturers. Parker Hydraulics, Hypro Pumps, Prince Hydraulics. Direct from the factory. Surplus equipment. We buy large quantities of manufacturer's surplus or excess stock.

www.surpluscenter.com

 

[Boxless]

I have the motor. Current issue is analysis/paralysis.

I purchased a six inch disk for my wheel and have started the machining on it, but now that I'm looking at it, it sure looks bigger than I need. I mean, this is going to be a slow speed grinder, so I don't need the angular velocity provided by a large diameter disk. With a smaller disk, I could just turn the RPM up some. I'm thinking that I could have gotten away with five inch dia, or even four.

So I've got a six inch diamond disk on the way and I'll look the whole thing over more when that arrives.

I'm also in the same boat with how I mount the wheel to my arbor... Do I want to make up a hub like you did. Or (since my disk is a full one inch thick) I could thread a hole in the middle of that disk and screw directly onto my threaded grinder arbor.

Analysis/paralysis. It's not just for other people.