Tratry Radial arm saw II

Hello,
Thanks to all that replied re my saw blade question.
Now the next snag: Power.
this saw comes with a 3Phase AC motor 3.3 KW 4.5 HP 330/575 V 7.3 AMP 60 CY 90 PF %
Obviously way too much for use at home. It is a direct drive motor and I cant hook it up due to its being 3 phase.
I have asked around to see about a single phase replacement motor, or re wiring this, but no luck. I know that going to a 1 phase would likely mean less cutting power, but really I can live with that.
Any suggestions would be greatly appreciated.
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I would recommend purchasing a Static or Rotary Phase converter. They are sold on eBay all the time or you can get them from Grainger or other vendors. This will covert your single phase power to 3 phase.
Additionally, I assume you could purchase a variable frequency AC drive. I plan to purchase one of these for my Powermatic Model 90 lathe that has a 3 phase motor in it. For the lathe, the VFD is good because it has a potentiometer on it to control the speed of the lathe. I wouldn't expect you would need that for an RAS, but you could leave it at a single setting.
I expect a rotary phase converter would be your best bet.
David
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Lotsa Luck. Replacing motors is *really* problematic with direct-drive.
Other than the equipment manufacturer -- *if* they offer anything -- you're probably looking at a "custom" motor re-builder, who _might_ be able build a single-phase assembly around the rotor/stator you have. Be sure you're sitting down when you ask for the price quote. :)
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snipped-for-privacy@yahoo.ca (Av8fan66) wrote in

You have several options, as some have already stated.
I built a static phase converter for use with my Unisaw that I bought from an industrial user. If you are reasonably comfortable with electricity, it isn't that bad. You just need to keep in mind that this is ~200-300VAC. Make sure that the power is off when you are in the box working.
Try these links: http://www.metalwebnews.com/howto/ph-conv/ph-conv.html http://www.metalwebnews.com/howto/phase-converter/phase-converter.html
Neither of these are the one that I used to make mine, that site has gone belly up, apparently. But these are the same theory.
Even if you don't build your own, at least with these you can get a better understanding of what you are paying someone else to do for you. That's something I always want to understand.
If I were to do it again (and I may do this soon) I would probably go with a rotary converter. If you read a little about phase converters, you will find that you get the best performance when using a rotary. Now, with a 4.5HP motor, you may not miss the power that you lose.
Another thing to keep in mind is that if you are going to use a converter on your present motor, you need to make sure that you have adequate wiring to your saw. 4.5HP will draw a decent amount of current.
Best of luck, Len
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