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True position of hex nut?




I have a print that is calling out the True position of a Hex Nut, on top of the FCF it has the description of the Hex nut instead of a diameter size. Have any had to deal with something like this?
Parents
  • Yes, please upload print or a sketch, hex features with GD&T callouts are very common at my shop
  • I get the part completely deburred & as clean as possible. Then with the largest diameter ball possible I probe the threads. I'll use two or three separate auto-circles with as many hits as possible using the appropriate positive or negative tread pitch. I'll then construct those circles into a cylinder & report the position of that cylinder.

    I have found that this method accurately reports position but not so much for reporting the thread's major diameter.
Reply
  • I get the part completely deburred & as clean as possible. Then with the largest diameter ball possible I probe the threads. I'll use two or three separate auto-circles with as many hits as possible using the appropriate positive or negative tread pitch. I'll then construct those circles into a cylinder & report the position of that cylinder.

    I have found that this method accurately reports position but not so much for reporting the thread's major diameter.
Children
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