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How to calculate equivalent cross-sectional area of thread contact?
2

How to calculate equivalent cross-sectional area of thread contact?

How to calculate equivalent cross-sectional area of thread contact?

(OP)
On #3-56 threads (small threads) how could you calculate the equivalent cross sectional area that would be made by the metal on metal contact in the threads for a given length of engagement?

If anyone can explain or just point me to a website I would appreciate it.

Thanks a lot.  

RE: How to calculate equivalent cross-sectional area of thread contact?

Remember the pull-out force will depend on how the threads are cut (100 % depth is very seldom achieved since that tends to break the tap; most taps are run in a hole that yields only about 60-75% theoretical engagement depth.)  

Also, verify that the calculated pull out force will be accurate for your actual case: if both metals (male and female) are not the same yield strength, the weaker will yield first.    

Nbr 3?   That's an unusual size.

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