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Thread modeling

Question asked by Matt Thomas on May 31, 2018
Latest reply on Jun 4, 2018 by Dan Golthing

Ello all:)


I have a question about thread modeling and the properties found in SW.


I am currently finding a book called the machinsts handbook or something like that because i have never seen how threads are made.


ok, in my book, we are making a cable tension device. It has a hook on each side and then you turn them in to tighten attached cables.


I get to the very end where i need to add the threads, it all makes great sense until the revolutions part. Book wants me to use 11 revs for the spiral helix. I type in 7 and i notice it ias about 3/4ths the way to the back side of the hole. Interesting i think. so i try 11, its flush. Ok, so my question is, does the spiral have to be exactly the same length as the hole that is to be threaded or can the spiral jut out a revolution or two from the back side of the hole? if that is bad pratice, how does one find the exact amount of revs is needed to thread a part? Or do we not thread parts anymore for drawings and just notate them?