Bench grinder motor for Ig

Anybody need a 40hp 3-ph motor for a bench grinder, drill press or such? It might take some adapting. I'm finally dismantling my dust collection system
not that I get all my blocks made elsewhere. The 40hp powered the 48" blower connected to the bag house outside. The little bit of woodworking we do now has small 1hp collectors on each shaper. Gee, for some reason my gas bill is 1/3 of what it was! I figure the 40hp costs about $12/hr to run so it might not be cost effective for a bench grinder but it sure would keep a 6" wheel turning when you bear down on it!
We put it on Craigs list for $850 but I sure would take a lot less.
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My guess is that you will get $400 for it. I have a nice collection of motors already, going up to 10 HP (call me a wimp if you want). That motor would make a great converter to run a big welder.
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wrote:

I had to buy it about 5 years ago when the old one died. It was a GE made in 1921, I called GE about warrantee information and was informed that the warrantee had just expired the previous month. I found the 40 at McKean used machinery and negotiated it down to $50. It was brand new and still had the shaft coated with that waxy plastic dip stuff. I hope you're right about $400, I would be thrilled! The end of an era for my woodworking department but I sure don't miss it.
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Iggy sez: "That motor would make a great converter to run a big welder."
Right on, Iggy. Consider though, if used as a RPC to power (1.5 x 40) = 60 HP full load, it would take wiring based on a minimum of 320 amps, probably more to meet code. That figure based on 60 HP of motors running on single-phase 220, at 80% pf and 80% eff. The idler motor alone spinning unloaded, as in a RPC, would draw 20 amps or so.
Bob Swinney
wrote:

My guess is that you will get $400 for it. I have a nice collection of motors already, going up to 10 HP (call me a wimp if you want). -- Due to extreme spam originating from Google Groups, and their inattention to spammers, I and many others block all articles originating from Google Groups. If you want your postings to be seen by more readers you will need to find a different means of posting on Usenet. http://improve-usenet.org/
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The full load is 40 HP divided by 1.5, not multiplied.
My 17.5 HP phase converter draws approximately 40 amps single phase under some loads. Figure a three times bigger number, it is a manageable 120 amps.
A 40 HP motor, plugged into three phase 240, should draw approximately 3.4*40, or 136 amps. As a phase converter, it should draw a comparable amount from its input before it would overheat its windings.
Tom's motor may be less efficient than that if it is that old.
i

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