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formula for thread triangle with sweep

  • Thread starter Thread starter Alerm
  • Start date Start date

Alerm

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Hello to all:smile:
as from title looking around among the various tutorials I managed to find I saw that many use a formula to calculate the size of the triangle for an external thread with sweep
The problem is that every tutorial uses its own and I still can't figure out which one is right.
for example in the annex I added the formula of a tutor that I found, although I can not understand what that p is
others use a division of type 7,55/2 :confused:
What do you think is the best solution to define the size of the triangle?

thanks to those who will contribute
 

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