A measure of the rate of work. Expressed as 33,000 pounds lifted one foot in one minute, or 550 pounds lifted one foot in one second. Exactly 746 watts of electrical power equals one horsepower. Torque and RPM may be used in relation to the horsepower of a motor. For fractional horsepower motors, the following formula may be used:
HP = Torque x Speed / 5252
where Torque is measured in pound-feet and Speed is measured in revolutions per minute (rpm).
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