Reply by BlankMan

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Posted on How powerful a router?

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1490 posts in 3317 days

#1 posted 03-21-2012 05:07 AM

David, yeah you’re right, you made me think of that, HP ratings are a joke. Take my PC 3-1/4HP, if it were truly 3-1/4HP it would draw 2,424 watts if the motor were 100% efficient at converting power which universal motors by no means, are. Their efficiency is low. 2400 watts is 20A, none of the nameplates on mine state 20A. Nameplate says 15A, that’s not even 2HP for a universal motor.

Even my 2HP routers if the efficiency was 80% which it’s not would draw 15A, it doesn’t say that on the nameplate, says 10A.

Probably the old Craftsman trick, Developed Horsepower, yeah developed right before the point at which it stalls.

-- -Curt, Milwaukee, WI

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