[MidFloridaTech]

Originally Posted by Caprirs Here is a PDF document for Mitsubishi's spindle motors and drives. See pages 12 and 13 of that brouchure to see the power curves for different motors. Those ratings are different from the plain old 3hp motor as found on a manual mill or lathe which only achieve rated power when at peak rpm.

So when one of those gets to say 750RPM, from 750RPM->4000RPM it will make the same amount of horsepower. (With the exceptions of the ones that fall off at the end.) However a manual lathe will be more like the HP for an IC engine and make a gradual progression upwards?

What makes the two different? Any links to curves for manual lathes/mills?