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Posted by David Sherman [24.32.202.83] on Saturday, April 17, 2010 at 00:27:04 :
In Reply to: Re: OT New/Old purchase posted by Kaegi [24.113.81.122] on Friday, April 16, 2010 at 20:49:52 :
3 phase stuff is cheap, but you can get VFDs (variable-frequency drives) nowadays for $100-$200 that will not only run a 3 phase motor off of single phase but will let you adjust its speed way below and a little bit above normal by turning a knob. That's probably overkill for a bench grinder, but it's something to keep in mind if you find an old 3-phase drill press or milling machine for cheap. I have a friend who's an electrician in a big paper mill and he says they use them all over the place and they work great. Even on a bench grinder, though, it would be handy to be able to dial the speed way down when grinding plastic or when using a buffing wheel on it.
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