Re: Questions regarding thread diameter and pitch for special design case wtih limited thread length


"John2005" <johnjmechanical@xxxxxxxxx> wrote

> I want the threaded connection to be as strong as possible so the rod
> supports the largest load possible. Would I be better off going with an
> extra fine 5/16 diameter X 32 pitch thread?

Conventional constant taper threads aren't particularly good in this
application, especially with the low thread depth you're specifying. There
are a variety of tapered threads (tapered profile and tapered tooth-form)
used in oilfield applications that have significantly higher moment capacity
than constant pitch threads...they have to be machined though, not tapped,
so they're expensive.

If you want more info, see http://www.hydril.com/ then look under "Premium
Connections".

Tom.


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