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Custom thread profile

Question asked by Jason Corl on Jun 23, 2009
Latest reply on Jul 21, 2009 by Raymond McHugh
I'm looking for a custom thread calculator. I have a Machinery's Handbook but I use many non-standard threads. I have tried going through the equations etc. (about 2 years ago, don't have info now) to create a calculator and it seems that there is not enough information to fully define a thread sketch. I would like to find or make a thread calculator that can calculate basic thread dimensions for say a M12.5 x 0.75P M Profile thread.

I understand basic angles, I can create the helix at proper pitch but cannot seem to define correct minor diameter, and have seen different formulas for root radius.

If anyone has resources for custom thread design that they could share I would greatly appreciate it.

thank you,

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