Will This Motor Work With This Grinder?

redsquid2

redsquid2

Free-Range Cheese Baby
Knifemaker / Craftsman / Service Provider
Joined
Aug 31, 2011
Messages
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My main concern is that the belt not be moving too fast when I am grinding. My current grinder is a 2X42 Craftsman and it moves too fast and I find it hard to work with.

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I know nothing about rpms and how they are affected by pulley sizes. I know nothing about voltage and phases and legs of whatever for 3 phases and whotnot.

I just want an improvement over the Craftsman 2X42, which is too fast, and which has been dropped on the shop floor and bent.

THank you so much.

Andy
 
Would it work? Yes.

Is it ideal? no.

It doesn't look like it is water and or dust proof, and you really kinda want those.

But if you have it on hand, why not?
 
That motor will work. But you will need to change the pulley wheel on the motor to a vbelt pulley or a vbelt step pulley. Cost you somewhere between $6-$22. Vbelt step pulley will give you more options for varying speeds. But either one will give you more control than you had with your 2x42.

Like A.Mcpherson said, it helps to be sealed motor so dust doesn't get in and wreck it, but if you have it on hand why not. It might last quite a while. There are lots of motors on craigs when this one goes. If you watch and have time you can pick up another sealed motor for around $100.

I made the grinder that is here http://dcknives.blogspot.com/p/grinder-motors.html and got a second hand motor and vfd. I love being able to push a button and change speed. No messing around trying to change pulleys to change speed. Vfd cost me about $100 motor was around $50. It cost me more than that to get my garage wired for 220v.
Sooooo....what I am saying it isn't a lot more $$ to get vfd set up than pulley set up and it saves hours of time in the long run. More time doing the fun stuff.
 
Huh. I just now noticed on the nameplate it says "A 22" under "115 V". I guess that means it uses 22 Amps, and my wiring is only 15 Amp. So this won't work, right?

Thanks again, and thanks for all the feedback.

Again, I never took classes in electricity, whether scientific or vocational
 
Last edited:
Randydb said:
That motor will work. But you will need to change the pulley wheel on the motor to a vbelt pulley or a vbelt step pulley. Cost you somewhere between $6-$22. Vbelt step pulley will give you more options for varying speeds. But either one will give you more control than you had with your 2x42.

Like A.Mcpherson said, it helps to be sealed motor so dust doesn't get in and wreck it, but if you have it on hand why not. It might last quite a while. There are lots of motors on craigs when this one goes. If you watch and have time you can pick up another sealed motor for around $100.

I made the grinder that is here http://dcknives.blogspot.com/p/grinder-motors.html and got a second hand motor and vfd. I love being able to push a button and change speed. No messing around trying to change pulleys to change speed. Vfd cost me about $100 motor was around $50. It cost me more than that to get my garage wired for 220v.
Sooooo....what I am saying it isn't a lot more $$ to get vfd set up than pulley set up and it saves hours of time in the long run. More time doing the fun stuff.
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Thanks so much. I did not read your post as carefully the first time, but there is a lot of useful information in it.
 
You really need a 220V/15 amp circuit to run any motor over 1HP. You also want a TEFC motor.
 
FYI, you're craftsman is likely a 3450 to 3600 RPM motor, so you'll have to step it down accordingly.

22 is the F.L.A., or full load amps, which is what it will draw momentarily on start up, or if you're really bogging it down. You can get away with a 20 amp circuit if you have 12awg wire and a 20 amp outlet (and breaker). 10 gauge and a 30amp breaker would be better, or best would be a 220v circuit as Stacy pointed out.

That said, my main concern would be that it's not a TEFC motor, and you'll be throwing a lot of metal dust at it.
 
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