SoCal Dave Posted April 27, 2012 Share Posted April 27, 2012 The current little giant hammer I'm look at has a 2 horsepower, three phase, 1800 rpm, 220/440v, 52 amp motor on it. My shop is at my home and I don't have three phase. Can I replace this with a 2 horsepower, single phase, 220v, 1800 rpm motor without running into issues like not enough power, or not strong enough which will eventually burn up the single phase? I know very, very little about motors. My initial thought was that they put a 3 phase motor on the hammer for a reason, because of the issues I mentioned above. There could be others that I'm not aware of. I would prefer not to use a phase converter. Any help/suggestions would be appreciated. Quote Link to comment Share on other sites More sharing options...
peacock Posted April 27, 2012 Share Posted April 27, 2012 A 2 hp single phase 220 volt will be fine. The 3 phase amp is most likely 5.2 not 52. 1725 or 1750 rpm is what you want. You may have to get a new pulley as the shaft size may be different on the new motor. Quote Link to comment Share on other sites More sharing options...
macbruce Posted April 27, 2012 Share Posted April 27, 2012 Assuming it's a 50lb'er a 2hp single ph will work fine, I've run them on 1 1/2 hp without any issues. If it's a 25lb 2hp is too much. Quote Link to comment Share on other sites More sharing options...
SoCal Dave Posted April 27, 2012 Author Share Posted April 27, 2012 Where would I get that kind of motor and what would be an average price? Quote Link to comment Share on other sites More sharing options...
macbruce Posted April 27, 2012 Share Posted April 27, 2012 BALDOR CM3558T 2 HP 1740 RPM 145C 1PH Grainger, msc, tek supply just to name a few.........Baldor makes a good motor. Quote Link to comment Share on other sites More sharing options...
peacock Posted April 27, 2012 Share Posted April 27, 2012 surpluscenter.com around $300 Quote Link to comment Share on other sites More sharing options...
ciladog Posted April 27, 2012 Share Posted April 27, 2012 Check into Variable Frequency Drives with single phase input and three phase output. It will cost less than a new motor and you will have speed control. Quote Link to comment Share on other sites More sharing options...
WayneCoeArtistBlacksmith Posted April 27, 2012 Share Posted April 27, 2012 I have single phase 2 hp 1800 rpm motors for $284.35 or a VFD for $448.00 Both wit free shipping to you. while the VFD is more expensive than the motor you could use it to also run a belt grinder or other piece of equipment with a 2 hp 1800 rpm motor. The other advantage is that you can control the speed of the motor with the VFD form 1 rpm to 3600 rpm. This might be an advantage on the hammer but definately for a belt grinder. If needed a fwd/rev switch is $35.00. Quote Link to comment Share on other sites More sharing options...
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