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Being practical I have been stuck in one question like if I have a 320 mm diameter and 805 mm long shaft which is suppose to rotate through gearbox how do I need to select a gearbox.

As per I think I need to calculate the torque of shaft and find the torque of gearbox and based on that I will select gearbox.

I just want to know the basic formula to calculate torque of shaft and torque of gearbox assuming that it has a flange mounted motor so again how much power we need for that perticular gearbox

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# Selection of gearbox for rotating a solid shaft

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