Posted by: jmarlow ® 03/20/2007, 18:25:19 Author Profile eMail author Edit

I have a steel threaded rod with a 2" ACME Stub (1.00 L Quad). I also have a steel nut threaded on this rod that is against a steel surface (fixed). If I load (compressive) the rod, how do I determine the amount of torque required to spin the nut on the rod? I assumed using the preload bolt equation to find torque, but in reverse since I presumably already have the load given. Thank you greatly for your input.

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Re: Stub ACME Thread Torque Calculation
Re: Stub ACME Thread Torque Calculation -- jmarlow	Post Reply	Top of thread	Forum

Posted by: jboggs ® 04/02/2007, 19:39:21 Author Profile eMail author Edit

See Acme threads in Machinery's Handbook. Basically, a screw is just an inclined plane wrapped around a cylinder, right? Screw pitch leads you to incline angle. Vector analysis gives you the simplest answer, but other factors are thread profile, friction, lubrication, etc.

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Re: Stub ACME Thread Torque Calculation
Re: Stub ACME Thread Torque Calculation -- jmarlow	Post Reply	Top of thread	Forum

Posted by: Olly ® 03/25/2007, 16:53:30 Author Profile eMail author Edit

Please, I don't understand, could you sketch a scheme of rod, nut, plate and forces?

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