Need help with motor for grinder

[calharkins]

Well, my 1x30 grinder bit the dust. I got 2 knives out of that. I am really considering a Cootes 2x72 grinder. Anyone know what kind of motor I need? I looked on surpluscenter.com and there were different mounts, phases, etc. I am not an electrical guru. I can hook up a simple switch or outlet, but that's about it. Any help from you electrical gurus would be greatly appreciated.

Thanks

 

[Edro20]

Not a guru at all, but here goes. I bought a 220V TEFC (totally enclosed fan cooled) motor (2HP). I bought a 2 pole switch from the local Home Depot. I did some dead reckoning with my multimeter and wired it all up. 220 is two "hots" (110V) with a single ground, hence the name. I have a Coote's and I look forward to a KMG or maybe a clone in the future. For now the 2HP TEFC and stepped pulleys are working well for me.

As far as the frame goes, I didn't know what to get so I got the best price on the one that was available. Mine has a solid base that is isolated by some rubber grommets that attach the motor to the base. These flex some and cause some wobble. Sorry to ramble, but I just stepped in and put together a grinder. No foresight, but I decided it was better to move forward than wait. I could have made better decisions, but that's life. I recommend that you move ahead and get your Coote's or other grinder going. You can refine things later. Do take care to make sure the electrical concerns are done properly. Just don't wait too long to begin....

 

[go mike]

Everyone has said that 1hp is the bare minimum for a grinder, so I would go for a 1.5 - 2 hp. Also try to find a TEFC, so it doesn't burn up with sawdust and metal shavings etc. I also suggest getting a 220v hookup, because most motors use up a lot of amps from a 110.

By the way, you're probably looking for a single phase motor, if your shop is set up like a normal house. 3 phase is a LOT of power.