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lathe Dog for small parts

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  • lathe Dog for small parts

    OK,

    Now that I have my lathe tuned and started turning my first projects. I realized that after I turned my first designed part my lathe dog will not clamp a 3/8 dia part

    Soooo.. What can I use to turn small parts between centers? One side is 3/8 inch about 2 inches long and the other end will be about 1/2 for may 1 inch long.

    Is there alternatives to a lathe dog?

  • #2
    they're easily made in those small sizes, drill a hole a little over 3/8, put a set screw in the side, with the aid of a torch bend over the leg....or bore a piece a little over 3/8, set screw, and well the leg on
    .

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    • #3
      They're very easy to make:

      http://homepage3.nifty.com/amigos/carrier/carrier-e.htm

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      • #4
        Here is one I made for our OD grinder, a threaded screw goes in the bottom.

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        • #5
          Thanks for the info.

          @dp

          I was actually just looking at that site. That is what I had started to make.

          I guess what I was hoping for as well was to be able to machine as close to the ends as possible. But for that small of dia I could probably get away with a 1/3 thick bar.

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          • #6
            Ahh,,,

            Found a solution so I could at least start finishing my part tonight.. Make the lathe dog later.

            But I found a round piece that was cutoff from another project and just wedged it in the lathe dog with the other part...

            Which made me think that a small insert inside a normal lathe dog can be used to capture smaller parts. One dog for everything

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            • #7
              Lathe dog for a 3/8" diameter? I would get a 1/2" shaft collar with a set screw and be half way there. Drill opposite the set screw and tap for a screw (#10 perhaps). LockTite a screw in, cut off the head, and bend it 90 degrees and you are done.

              If you want to be a pureist, make the collar from 1" OD stock.
              Paul A.
              SE Texas

              Make it fit.
              You can't win and there is a penalty for trying!

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              • #8
                http://www.sherlinedirect.com/index....product_id=487

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                • #9
                  ..they are called lathe pups
                  "...do you not think you have enough machines?"

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                  • #10
                    Thanks for the feedback, I was hoping to get more suggestions on my question and that is:

                    are there alternatives? I have seen some face drivers which I like as it would allow me to turn closer to the end of my part. If I decided to CNC my lathe it seems that would be a lot quicker setup as well. Frank Ford has a nice one, but I don't have the link to it on this computer. It would be hard to scale that down to the smaller parts though I am sure.

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                    • #11
                      Do you actually need to turn these parts between centres? I usually put a piece of over length over size bar in the 3 jaw, centre one end for tailstock support, turn the part and part off. Makes slender shafts slightly stiffer because holding one end in the 3 jaw with tailstock support at the other is the equivalent of a beam built in at one end and simply supported at the other, whereas between centres is the equivalent of a beam simply supported at both ends. Usually the only time I have to use the between centres method is on crankshafts.

                      richard

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                      • #12
                        Originally posted by Richard Wilson
                        Do you actually need to turn these parts between centres? I usually put a piece of over length over size bar in the 3 jaw, centre one end for tailstock support, turn the part and part off. Makes slender shafts slightly stiffer because holding one end in the 3 jaw with tailstock support at the other is the equivalent of a beam built in at one end and simply supported at the other, whereas between centres is the equivalent of a beam simply supported at both ends. Usually the only time I have to use the between centres method is on crankshafts.

                        richard

                        Actually that is how I started finishing the part. Finally realized I didn't need to actually hold between centers. But I do have to turn the part around to finish, haven't learned how to cut in reverse yet... baby steps

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