motor for a bench grinder

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i read some place in the forum that some body used a either a washer or dryer motor for a grinder i need a bench grinder but cannot afford one if some body made one i sure would like to know how they did it  i have the anchors for a grinder and a wire wheel is it a straight shaft set up or a pulley system thanks for all the help i have acess to alot of washers or dryers which is better an ac or dc motor and how can i tell the difference something about a transformer im no electrician keep it simple thanks
Reply:Well for starters the washerand  dryer motors are usually 1750 RPM and are usually 1/3 or 1/2 HP and grinder wheels work best at 3600 RPM. If you try to speed up your rig w/ a motor pulley twice the dia. of the arbor pulley, I think you'll come up waaaay short on horsepower. If you can find a 3/4 or 1 HP 3600 RPM motor, I think you'd be a lot happier w/ it or a 1750 RPM motor of that HP w/ the 2:1 ratio.  As for AC or DC, stick w/ the AC.                                     JMHO,                                               MikeOl' Stonebreaker  "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:They make adapter arbor fittings to fit different motor shaft sizes so you can turn almost any motor into a buffer/grinder/polisher. I've got one set up with a wire brush wheel to clean/polish parts. It's just a simple motor of some type with the arbor adapter attached to the motor shaft. I've got two other HD grinders,but I use this simple set up all the time for quick clean-up of parts. It works great for cleaning threads when assembling things.It's so handy I'm thinking of making another with a different wheel type for other things.I think Grizzly has a jackshaft assembly that would make a nifty set up if you want to utilize almost any motor you find. Old furnace blower motors work pretty well also.