INTERNAL THREADING

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  • Phil
    Junior Member
    • Feb 2003
    • 2

    INTERNAL THREADING

    I've been working thru the details for setting up for internal threading;
    1. Rotate cross-feed to the LEFT 29 degrees.
    2. Thread Right to Left(towards headstock).
    3. Adjust cross-feed dial CCW .

    Is this correct?

    ------------------
  • hoffman
    Senior Member
    • Oct 2004
    • 1356

    #2
    Sounds like it! I'd make a few practice passes away from the spindle to practice throwing the half nut.

    Good luck.
    Techno-Anarchist

    Comment

    • bikenut
      Senior Member
      • Jan 2003
      • 235

      #3
      If at all possible, I cut my internal threads with the cutting tool upside down, and work the back side of the part. This allows you to use the same setup as cutting OD threads, also the chips fall away from the tool instead of building up on top of it.
      Smitty.... Ride Hard, Die Fast

      Comment

      • Carl
        Senior Member
        • Apr 2003
        • 1360

        #4
        <font face="Verdana, Arial" size="2">Originally posted by bikenut:
        If at all possible, I cut my internal threads with the cutting tool upside down, and work the back side of the part. This allows you to use the same setup as cutting OD threads, also the chips fall away from the tool instead of building up on top of it.</font>
        I'll second that, works great!

        THAT OLD GANG 'O MINE

        Comment

        • Frank Ford
          Senior Member
          • Dec 2003
          • 1449

          #5
          Me, three!
          Cheers,

          Frank Ford
          HomeShopTech

          Comment

          • ricksplace
            Senior Member
            • Feb 2005
            • 291

            #6
            Interesting idea. I have always cut inside threads the way the textbooks show, like Phil described.

            Next time, I'll have to try the upside down tool method mentioned.

            Rick.

            Comment

            • Lew Hartswick
              Senior Member
              • Aug 2002
              • 3664

              #7
              I just did my first inside threads about a week
              ago. I did it with the tool cutting edge up
              and at the rear of the part running the spindle
              in reverse, that alowed me to cut from the
              inside end of the thread to the open end. Makes
              it unnecessary to get the half nut open at a
              crittical time.
              ...lew...

              Comment

              • Harold_V
                Member
                • Jan 2005
                • 60

                #8
                <font face="Verdana, Arial" size="2">Originally posted by Lew Hartswick:
                I just did my first inside threads about a week
                ago. I did it with the tool cutting edge up
                and at the rear of the part running the spindle
                in reverse, that alowed me to cut from the
                inside end of the thread to the open end. Makes
                it unnecessary to get the half nut open at a
                crittical time.
                ...lew...
                </font>
                Yep!

                I trust you had your compound at either 1:00 or 7:00. Big mistake if not.

                Harold

                Comment

                • spope14
                  Senior Member
                  • Dec 2001
                  • 2015

                  #9
                  Sounds like the right set-up. If you need some math for the bore size, and the compound rest "infeed" (or in this case outfeed), check this web page out and look it up in the math reference.




                  My home page - not recently updated though:

                  CCBW, MAH

                  Comment

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