I am trying to design a planetary gear box that will have 5,000 in lbs of break away torque at the output shaft. The primary and secondary sets will have a 4:1 reduction ratio. My problem is how do I determine the required input horspower of a 1700 RPM motor, and how do I calculate the face width. I was planning on using a Diameteral Pitch of 16 for the gears.
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