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One tool - two uses (pics)

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  • One tool - two uses (pics)

    A recent article in "American Machinist" reminded me of something I made twenty years ago for a

    friend. The body of the tool is a through-drilled cylinder with one quarter of its body

    accurately milled away.



    Insert the punch, made from hardened drill rod, into the hole, align the edges of the cutaway

    portion with your scribe lines and voila (not viola - a musical instrument), the punch mark is on

    the intersection of the lines.



    But wait, there's more! (He shouts, madly waving his Ginsu steak knife.) Ever had the problem of

    having to align to the edge of a piece of stock angled in the milling machine vise? Drop the

    body of the punch over the edge and use the edge finder to locate on its circumference. Since

    the diameter of the punch is known (or can be easily measured), it's a simple matter to locate

    the spindle axis directly over the edge.



    The one shown is massive enough to not move under the friction of the edge finder but, if you

    have problems, apply a dab of oil or grease to hold it in place with the capillary action. (I

    have a miniature version that requires this to remain in place.
    Last edited by mklotz; 04-14-2013, 08:12 PM.
    Regards, Marv

    Home Shop Freeware - Tools for People Who Build Things
    http://www.myvirtualnetwork.com/mklotz

    Location: LA, CA, USA

  • #2
    That is slick! I've got to save those photos for my files..


    HTRN
    EGO partum , proinde EGO sum

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    • #3
      Perhaps this is the start of a tips book 3.

      What do you think Craig?

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      • #4
        That's a neat gadget. Thanks for showing it
        John R

        Comment


        • #5
          Originally posted by mklotz
          Ever had the problem of having to align to the edge of a piece of stock angled in the milling machine vise? Drop the body of the punch over the edge and use the edge finder to locate on its circumference.
          Too funny -- that's Japanese corner-finding Edge Finder that was extensively discussed on PM last week:

          Accurately locating angular holes?

          The one shown is massive enough to not move under the friction of the edge finder but, if you have problems, apply a dab of oil or grease to hold it in place with the capillary action.
          Just bore two holes and add round magnets :

          Last edited by lazlo; 04-02-2007, 05:04 PM.
          "Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did."

          Comment


          • #6
            Originally posted by lazlo

            Just bore two holes and add round magnets :

            [
            Where can I buy brass magnets? I know, the same place they sell aluminum magnets
            Regards, Marv

            Home Shop Freeware - Tools for People Who Build Things
            http://www.myvirtualnetwork.com/mklotz

            Location: LA, CA, USA

            Comment


            • #7
              Argh -- network problem.
              "Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did."

              Comment


              • #8
                Originally posted by mklotz
                Where can I buy brass magnets? I know, the same place they sell aluminum magnets
                Uhhh, I mean you would epoxy round magnets into the flat segment you cut out of the brass ring. Am I missing something?

                This is what the inside of the Japanese edge finder (the "Cornerizer" ) looks like:

                "Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did."

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                • #9
                  No, Lazlo, I'm talking about the magnets that STICK to the brass and aluminum parts I'm making.
                  Regards, Marv

                  Home Shop Freeware - Tools for People Who Build Things
                  http://www.myvirtualnetwork.com/mklotz

                  Location: LA, CA, USA

                  Comment


                  • #10
                    "No, Lazlo, I'm talking about the magnets that STICK to the brass and aluminum parts I'm making."

                    Marv, THOSE magnets need some oil or grease to hold them in place by the stickery action.

                    Rgds
                    Michael

                    Australia

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                    • #11
                      You can use your tool to clamp that oddball shaped part without
                      mashing the corner too!



                      Kap

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                      • #12
                        OK, I like it. Now how do I hold the cylinder to do the milling accurately?
                        ...lew...

                        Comment


                        • #13
                          Originally posted by mklotz
                          No, Lazlo, I'm talking about the magnets that STICK to the brass and aluminum parts I'm making.
                          Doh! In the picture the block looks grey -- I thought that was steel
                          "Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did."

                          Comment


                          • #14
                            You can make an electromagnet that attracts non-ferrous metals. It isn't new either.

                            http://www.lindsaybks.com/bks2/elmag/index.html
                            Free software for calculating bolt circles and similar: Click Here

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                            • #15
                              Ughhhh

                              HM why not just edge find the edge???????

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