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Re: stress Area for screw thread

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Posted By<" ">B.J. Hughes on May 21, 2002 at 09:42:10:

In Reply to: stress Area for screw thread posted byRoberto Portulano on May 14, 2002 at 03:48:10:

Equations to determine stress area for screw threads: reference Machinery's Handbook (Edition 24, page 1325)

For steels of up to 100,000 psi ultimate tensile strength:
A = .7854(D-.9743/n)^2; where A=tensile stress area of screw thread, D=basic major diameter of thread, n=number of threads per inch

For steels of over 100,000 psi ultimate tensile strength:
A = 3.1416((Emin/2)-(0.16238/n))^2; where Emin=minimum pitch diameter of external thread, all other symbols remain same as above

I hope that this info is helpful.
Regards,
B.J.

: Would I like know a theoretical equation to calculate stress area for screws thread.
: best regards.
: roberto Portulano

Follow Ups

Re: Re: stress Area for screw thread Jim Stewart 04:23:38 12/04/02 (0)

Subject: Re: Re: stress Area for screw thread

Comments:: Equations to determine stress area for screw threads: reference Machinery's Handbook (Edition 24, page 1325) : For steels of up to 100,000 psi ultimate tensile strength: : A = .7854(D-.9743/n)^2; where A=tensile stress area of screw thread, D=basic major diameter of thread, n=number of threads per inch : For steels of over 100,000 psi ultimate tensile strength: : A = 3.1416((Emin/2)-(0.16238/n))^2; where Emin=minimum pitch diameter of external thread, all other symbols remain same as above : I hope that this info is helpful. : Regards, : B.J. : : Would I like know a theoretical equation to calculate stress area for screws thread. : : best regards. : : roberto Portulano

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