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Hey Ralph:
First a brief explanation and then a site for you to check out.
Torque is the measure of how hard we can twist something. It is usually expresed in FTLBS. For example, there is a well in your back yard. When the bucket in the well is full it weighs 10 pounds. The roller that the rope is attached to is 2 feet in diameter. In order to lift the water to the top you must twist the roller with a torque of 10 FTLBS (10 pounds X 1 ft radius). Whether is takes you 3 seconds to lift the bucket or 5 minutes, the torque applied was 10 FTLBS. The time is of no importance since torque does not care about time.
Power measurement, however, do. The power needed to raise the bucket in 3 seconds is far greater than the power needed to do it in 5 minutes. That is why 400 FT_LBS of torque is more valuable at 5500 RPMs than at 2500 RPMs.
The is a great explanation of the whole business at "www.seansa4page.com/resource/torquehp.html".
Check it out.
Bob In Ct
