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Polymer Thread

Polymer Thread

Polymer Thread

(OP)

Im designing a piece of equipment with the need for a plastic thread.  The diamater is approx 90mm

This thread will not be load bearing or need to be tightened much, just needs to do up loosely and sit there. It will also be done up and undone often.

I was thinking of a thread similar to that on pvc plumbing pipe which seems pretty rugged and tough and doesnt require many turns to do up but i cant find any information at all on it.

Does anyone know anywhere where i can find specs on this thread or a thread that would do something similar,  or should i just design a thread myself?

Thanks in advance

RE: Polymer Thread

(OP)
Thanks for that, just what i needed.

Did search google, but came up drawing blanks, didnt think of looking at the manufacturers so thats why i came here.

RE: Polymer Thread

PVC plumbing pipe uses, guess what, pipe threads.  
You should find details in your Machinery's Handbook.

However, pipe threads are not optimized for plastics, and especially not for repeated makeup.

You might look at stub Acme threads, or any of the fire hose threads, or Camlok couplings.

 

Mike Halloran
Pembroke Pines, FL, USA

RE: Polymer Thread

(OP)
I understand pvc pipe uses pipe threads, but it isnt a standard thread and i cant find the details of it, and it is these details which i was after.  As you say a plastic thread is very different to a metal one, hence trying to find plastic specific designs so that i cant get it right.

My problem is compounded due to that i want a large pitch but can only have a small thread depth due to dimensional restraints, so a non-standard design is required.  I was looking for help in speccing a thread like this.
 

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