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  • Over and Under

    Do you adjust for Over and Under? Situations?

    Thanks.


    J.C.

  • #2
    Re: Over and Under

    Originally posted by JCsPlumbing View Post
    Do you adjust for Over and Under? Situations?

    Thanks.


    J.C.
    Not sure ..it really depends on the situation ..Over
    ''Beer is proof that God loves us and wants us to be happy" Benjamin Franklin

    Comment


    • #3
      Re: Over and Under

      Threading die.


      J.C.

      Comment


      • #4
        Re: Over and Under

        Did Mommy give You a Dick Tracy Code Book ?
        I can build anything You want , if you draw a picture of it , on the back of a big enough check .

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        • #5
          Re: Over and Under

          Originally posted by toolaholic View Post
          Did Mommy give You a Dick Tracy Code Book ?
          No.

          A diehead has an "over" and "under" compensation built into it. I was curious as when others use it, if ever, and what situations. And if it could possibly help them if they did start to recognize this feature to decrease a percentage of problems that may arise with certain materials.

          I'm not smart enough for a Dick Tracy Code Book.

          Thanks.


          J.C.

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          • #6
            Re: Over and Under

            I thought it was used to compensate for die wear *shrug*

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            • #7
              Re: Over and Under

              Recently, while threading 3" gal for starter nipples coming out of Zurn scupper drains we had to adjust the die head so that the threads would cut a little deeper than a normal malleable fitting would require because the nipples would only hand thread into the drains a half turn before a wrench was required and we knew that a water tight seal would be impossible to achieve. The reason for the gal nipples was because the 7" Zurn nipples were too short for our application.

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              • #8
                Re: Over and Under

                Bill
                Compensating for die and diehead wear is a pita, especially when many people are using the same threader.

                Comment


                • #9
                  Re: Over and Under

                  Originally posted by OkieBill View Post
                  I thought it was used to compensate for die wear *shrug*
                  Then why the under? Have to confess that I've never really messed with it. Thought I might be able to improve connections if I learned from ya'll folks.

                  J.C.

                  Comment


                  • #10
                    Re: Over and Under

                    Originally posted by Plumbus View Post
                    Recently, while threading 3" gal for starter nipples coming out of Zurn scupper drains we had to adjust the die head so that the threads would cut a little deeper than a normal malleable fitting would require because the nipples would only hand thread into the drains a half turn before a wrench was required and we knew that a water tight seal would be impossible to achieve. The reason for the gal nipples was because the 7" Zurn nipples were too short for our application.
                    Cool.

                    J.C.

                    Comment


                    • #11
                      Re: Over and Under

                      Originally posted by JCsPlumbing View Post
                      Do you adjust for Over and Under? Situations?

                      Thanks.


                      J.C.
                      JC When you're compensating pipe threads for tight or loose fitting (FIP) threads the "over" and "under" are the opposite of what a body would think. If you want the MIP threads to have a larger diameter you under cut them. If you want them a smaller diameter you over cut them.
                      Time flies like an arrow.

                      Fruit flies like a banana.

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