Question

How to calculate the torque required to rotate a shaft?

Answer 1

Answer:

It depends on the angular acceleration alpha (rad/s) with which the shaft is to be rotated and the mass moment of inertia J (kg-m^2) of the shaft about its axis of rotation. Then use the formula suggested by Sascha Duczek,

In your case J = Ms*D^2/8 + 1200*r^2 + Jg,

D = Shaft dia, Ms = mass of shaft,

r = distance of CG of the attached mass from the centre of rotation,

Jg = MI of the attached mass about an axis through its CG and parallel to the axis of rotation.

Hope this will help!

^_^

Answer 2

HERE IS YOUR ANSWER

Torque: It can be defined as the twisting force, acting on an object that results in a rotation.

Practically, we can use a torque sensor to record the values of torque in a rotating shaft. A Torque sensor is a device that converts torsional mechanical input into electrical output.

Theoretically, we can use the following formulas,

Torque= Force*perpendicular distance (from the center axis to the point of action of force)

Power=(2*pi*N*T)/60

where N is the number of rotations per minute and T is torque

The unit of torque is Nm

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