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Torque and RPM

  1. Jun 24, 2015 #1
    What is the use of torque of a motor? Is it not the RPM that is needed? And up to what percentage the torque could be reduced to increase the RPM?
  2. jcsd
  3. Jun 24, 2015 #2


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    Staff: Mentor

    Welcome to PF!
    Torque is what applies rotational force to things. Like tightening a large bolt or rapidly accelerating a car requires a lot of torque.
    The relationship depends on the motor.
  4. Jun 24, 2015 #3


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    Science Advisor

    Torque multiplied by RPM is Power.
    A gearbox can transform power between torque and RPM.
    There are limits to high RPM with low torque due to friction.
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