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Thread in Two Directions At Once

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  • Thread in Two Directions At Once

    Another very interesting Russian machining video.
    Don't forget to turn on English subtitles.

    Last edited by Willy; 12-16-2020, 03:29 PM.
    Home, down in the valley behind the Red Angus
    Bad Decisions Make Good Stories​

    Location: British Columbia

  • #2
    Impressive to say the least. I wouldn’t have had the brains nor the patience to complete that project!

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    • #3
      Interesting ---- begs the question - does anyone do this with wider space effect for an alternative means of knurling?

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      • #4
        Remember the Stanley Yankie Handiman screwdriver, not as pretty, I still have one somewhere.

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        • #5
          I could screw that up before the first pass.

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          • #6
            That's easy to do on a rose engine. Just left and right helixes.

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            • #7
              Originally posted by A.K. Boomer View Post
              Interesting ---- begs the question - does anyone do this with wider space effect for an alternative means of knurling?
              I made some motorcycle footpegs like that many years ago by single pointing a coarse thread in both directions. Well, I attempted to make some anyway. They turned out pretty crappy and I abandoned the idea and went back to knurling.

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              • #8
                Originally posted by A.K. Boomer View Post
                Interesting ---- begs the question - does anyone do this with wider space effect for an alternative means of knurling?
                A 90 or 120 degree cutter would work better than a 60 degree cutter for knurling.

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                • #9
                  I fell asleep. How did he make the nuts?
                  Paul A.
                  SE Texas

                  And if you look REAL close at an analog signal,
                  You will find that it has discrete steps.

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                  • #10
                    Single point threading. The nuts are not threaded with both hands like the screw - one nut is right hand, one nut is left hand.

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                    • #11
                      who can think of a practical application?

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                      • #12
                        Originally posted by dian View Post
                        who can think of a practical application?
                        See post #4

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                        • #13
                          Originally posted by dian View Post
                          who can think of a practical application?
                          Really cool self-centering vise?

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                          • #14
                            Originally posted by dian View Post
                            who can think of a practical application?
                            Making a youtube video about it and generating ad and click revenue

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                            • #15
                              The male and female threads cannot actually match as the thread angles will be different. Only a slack fit allows the nuts to run on the double male thread. Think about it.

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