Is this motor enough to run a 1x42

T

Trevor51

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Jun 24, 2015
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Hi guys I just picked up this motor at a garage sale and I'm thinking of building a 1x42 belt grinder. I'm just wondering if this is a good motor for that. And I'm entertaining the thought of possible a 2x72 but I'm unsure if this would work good. Thanks I appreciate all your help.

 
Aside from not variable speed capable.
Assuming you dont have crazy heavy beltwheels, it can easily run 1x42. It will run a 2x72, albeit on the lower end of "good".

Its a great motor for what it is.
 
2HP. Seems like plenty to me. Stepped pulleys for speed contol is your only option

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You can adjust your belt speed down by using a smaller drive wheel. A TEFC is usually recommended for environments where metal dust might get into the motor and short it.
 
probrwr said:
2HP. Seems like plenty to me. Stepped pulleys for speed contol is your only option

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its too fast to run Balls Out! you want to reduce it with Step pulleys to Half of the 2450 and less. It will run a 2 X 72" Build one ofr those so you have a real big boy grinder.

You get the best selection of belts at the best price with 2 x 72" my first was a www.cootebeltgrinder.com some 20 years ago.
I still have it along with two other 2 x 72" machines.
 
IMHO, it is too large and way too fast for a1X42" grinder. Those generally run on 1/2HP to 3/4HP. 2HP certainly will be overkill. You would have to reduce the speed significantly with pulleys to get to 1750 or below. For a 1X42, I would only run at 1000RPM. The motor isn't TEFC, so it may fail due to dust and metal particles getting into the interior.
 
Is there any way to avoid the dust getting in, I'm assuming just dust collection right at the grinding belt and possible at the motor to. I'm trying to figure out the cheapest place to get 2x72 belts shipped to Canada does any one know?
 
Check out knifemaker.ca for 2x72 belts available to order online within Canada. Their shop is located in Alberta.
 
What's your opinions should I use it on a 2/72 or is it to weak. Or should I just not use it because the risk of getting dust into it
 
Being its going to need reduction via belts, you could build a dust excluding enclosure on the motor. Obviously, ventilation will be required.
 
Power wise, it is more than sufficient for running a 2X72. The issue will be the Service Factor ( special - compressor duty) and the open frame cooling. Both can be overcome, but the life may not be nearly as long as TEFC motor with a high SF rating.
 
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Sorry I'm not the best with electrical stuff and I'm unsure to how long the duty cycle would be on this and what does that mean I will have to do when running the belt grinder.
 
No sealed bearings might be of some concern, depending on what the provision is for lubing them/how they're protected. It won't take much grinding dust to ruin them.

But, if it was cheap and it works for a while, it's certainly sufficient to drive a 2x72.
 
Trevor51 said:
Sorry I'm not the best with electrical stuff and I'm unsure to how long the duty cycle would be on this and what does that mean I will have to do when running the belt grinder.
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My error on saying duty cycle. I meant Service Factor - SF on the plate. This motor is rated "SPCL" which means special. It is a capacitor start compressor duty motor, which works great on a compressor, but isn't made to take loads that vary as on a grinder. On a small grinder, it wouldn't make any difference, as it is four times the power needed for most 1X42's.

As "The Count" said - just use it and replace it when it goes bad.
 
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