quick question on motor for home made belt sander

[JPGreco]

Sorry, but I really couldn't figure out how to search for this question without getting every knife thread returned.

I have come into a 3/4 hp electric motor. I have to make sure it works, but it should since it came out of a, to my knowledge, working spa tub. I see Grizzly's knife sander is a 1hp motor @ 1750 rpm. The one I have is 3/4hp @ 3450rpm (115v 9.2amps). Is the RPM too high for a belt sander for knives? I mean, its like twice what most motors are at that I find.

I know I could probably gear down the RPM with a little work, but that's just more parts to find/buy. Also, any advice on where to find/buy the rest of the parts for the the belt guides?

As for setting everything up. I can turn the power supply line into a standard plug right? I mean there is no turn on line for this thing, so I assume it was just on a switch. I'll find that out when I do it, but just want any advice from those who have gone before me.

Thanks folks

[Winter]

Mine is ran off of and mounted to a table saw. It's a 3/4 hp at 3450rpm.

[JPGreco]

thanks winter, now to just take this damn thing apart to get the water pump assembly off of it. Its screwed on from inside the motor assembly, which makes it a lot more difficult to get off now.

[Echo2]

goto the scrap yard and find some pullys out of a drill press.

What are you using for wheels?

[JPGreco]

Nothing yet echo, project is gonna be my winter down time from work project I think. The only thing I have is the motor right now. I'll use anything I can get my hands on personally.

[crashdive123]

It will work. I'm using a 1.5 hp motor turning at 1725 on one grinder and a 2 hp turning at 3450 on the other. My contact wheels for grinding (on both) are turning at about the same speed. It's all on the size of your drive wheel.

I like to do my grinding with the belt moving at about 4500 feet per minute. On my 1725 motor I have a 10" drive wheel while there is a 5" drive wheel on the 3450.

To figure out your belt speed use this formula. (pi)*(diameter of the drive wheel in inches)*(drive wheel RPM)/12 = surface feet per minute

[JPGreco]

Thanks Crash, that will help a ton when I get this thing going. I still gotta figure out how to take it apart to get the damn water pump assembly off of it. Its screwed together from the interior for some brilliant reason.

[scotirishgrinder]

http://www.ebay.com/itm/ROUTER-SPEED...item58949d78ec

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