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Forums
Engineering
Mechanical Engineering
Calculating Torque for Rack and Pinion Lifting System
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[QUOTE="Tom.G, post: 6107812, member: 581973"] Not my field, but here goes just to get the thread started. You need to treat the pinion as a lever. The 4in. pitch diameter places the force at 2in. from the rotational center. That shows you need 7200in-lbs [B]just to keep it moving.[/B] The other part of the problem is you need to accelerate that 3600lbs from a stand-still to a speed of around 8ft per second in 3sec. (Assuming it spends as much time getting up to speed as it does slowing to a stop.) I'l let the mechanical experts take it from here. Edit: The distance traveled per pinion revolution would be π⋅D, wher D is the pinion pitch diameter; about 12.57 inches with a 4in pitch dia. Cheers, Tom [/QUOTE]
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Mechanical Engineering
Calculating Torque for Rack and Pinion Lifting System
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