I would get the correct socket cap screw and get it turned down on a lathe (the head) screw it in and check it as a stud. like previously stated too many variable using the pitch... or just measuring the minor Ø anyways with that, not truly the threaded hole location. and whos to say all the threads start in the same spot on every part???
There is nothing wrong with this method, but what if you have many holes to check on a production part ? Very time consuming. You are correct, there is no way to know where the threads start, thats why the pitch function works so well. whether your first point is on the crest, or half way in between, it doesn't matter, it hits in that same spot all the way up coming out of the hole. making sure you have a proper probe diameter and you are golden....some people in this thread seem to doubt the reliability or accuracy of this method, well, knock yourself out, do it your way...its like banging your head on a wall...
I would get the correct socket cap screw and get it turned down on a lathe (the head) screw it in and check it as a stud. like previously stated too many variable using the pitch... or just measuring the minor Ø anyways with that, not truly the threaded hole location. and whos to say all the threads start in the same spot on every part???
There is nothing wrong with this method, but what if you have many holes to check on a production part ? Very time consuming. You are correct, there is no way to know where the threads start, thats why the pitch function works so well. whether your first point is on the crest, or half way in between, it doesn't matter, it hits in that same spot all the way up coming out of the hole. making sure you have a proper probe diameter and you are golden....some people in this thread seem to doubt the reliability or accuracy of this method, well, knock yourself out, do it your way...its like banging your head on a wall...
