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Old June 4th, 2011, 07:58 PM   #1
Yota Bill
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Default calculating torque output of a gear reduction

I think I'm over-thinking this one, but is torque applied to the input of a gear reduction directly proportional to the torque output? Speed obviously is, but does torque calculate differently then just multiplying it?
For example, if a torque of 28 lb/ft was applied to the input of a 300:1 gear reduction, would the output be 8,400 lb/ft? Obviously there would be some loss in gear mesh, case deflection, etc.
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Old June 4th, 2011, 08:42 PM   #2
Haggar
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Yes, exactly.

Torque is force, so is multiplied by the mechanical advtantage/gear ratio.

Now, horsepower on the otherhand is power. So horsepower in = horsepower out, minus parasitic loss..
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Old June 4th, 2011, 10:50 PM   #3
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thats exactly what I was thinking...kinda surprised that rod broke at only 8,400 lb/ft...oops
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