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• # to calculate torque required

Discussion in 'Calculations' started by zubair, Mar 27, 2013.

1. ### zubairMember

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Dec 2011
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Hi all
I am using spur pinion and driven gear mechanism to rotate a cylinder. Outer diameter of pinion is 30mm and that of driven gear is 60mm. Mass of cylinder is 500 grams. I have to select a motor of suitable torque for this purpose. Will anybody help me how to calculate torque???

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3. ### windnsailsNew Member

Joined:
Mar 2012
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For starters, I think you need the P.D. of both gears, not the O.D.

You also need the radius of gyration for the cylinder and a definition of what the load is and the friction it is resisting.

Finally, you need a better definition of the problem. For instance, a long small diameter 500g cylinder spinning at constant speed with ball bearings is going to require a lot less torque than a 500g cylinder with no bearings and a large O.D. starting at rest and needing to come up to speed in 0.1 second.

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