Motor Driving Hollow Cylinder Rotating Torque Equation and Calculator
These equations will determine the torque requirements for a electric motor operating with a hollow shaft driven by the motor.
To determine a fan or blowers horsepower when driving a hollow cylinder/shaft use the following equation.
|T =||Required Torque, lb-ft|
|WK2 =||Mass Moment of Inertia of load to be accelerated lb-ft2
(See Mass moment of inertia calculations)
|=||Change of speed, rpm|
|t =||Time to accelerate the load, seconds|
|W =||Weight of object, lb|
|R1 =||Outside Radius of cylinder, ft|
|R2 =||Inside Radius of cylinder, ft|