I'm looking for a custom thread calculator. I have aMachinery's Handbook but I use many non-standard threads. I havetried going through the equations etc. (about 2 years ago, don'thave info now) to create a calculator and it seems that there isnot enough information to fully define a thread sketch. I wouldlike to find or make a thread calculator that can calculate basicthread dimensions for say a M12.5 x 0.75P M Profile thread.

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

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

thank you,
SolidworksSketching