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Dovetail cutter and angles.

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Dovetail cutter and angles.

Home › Forums › General Questions › Dovetail cutter and angles.

Viewing 8 posts - 1 through 8 (of 8 total)
  • Author
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  • 6 January 2022 at 17:54 #578929
    Steve Crow
    Participant
      @stevecrow46066

      I am looking to make a dovetail cutter using a 55 degree insert (DCMT?).

      Would I be best using the insert "square" for a 55 degree dovetail like in the first drawing or leaving some clearance on the bottom for a 60 angle like in the second one?

      dove1.jpg

      Incidentally, the dovetails used on my Sherline machines are 55.5 degrees.

      Cheers

      Steve

      6 January 2022 at 17:54 #28502
      Steve Crow
      Participant
        @stevecrow46066
        6 January 2022 at 18:11 #578933
        Emgee
        Participant
          @emgee

          Steve

          Are you talking about turning the tool in a lathe ?

          If so either insert will do the job as the angle will be formed by using the compound set over to cut the angle required, using the full cutting length of the insert would most likely cause a lot of chatter.

          Emgee

          6 January 2022 at 18:21 #578937
          JasonB
          Moderator
            @jasonb

            I would go with the tilted one, think of any milling cutter and the ends of the flutes are not ground flat, they rise slightly to the ctr. Does not have to be 5deg if you are cutting both halves

            There have been a few other posts on here about making these single insert cutters and all work well, most use a triangular insert laid back/forward slightly so they clear the bottom but still cut a 60deg face due to the compound angle. Also plenty of commercial ones about so should work if feed to suit the single cutter.

            I'd go with a DCGT if you are using a light mill to run it.

            6 January 2022 at 18:22 #578938
            Steve Crow
            Participant
              @stevecrow46066

              Maybe I should have explained a bit more.

              What I am asking is which design of dovetail cutter would work best?

              6 January 2022 at 18:24 #578939
              JasonB
              Moderator
                @jasonb

                Did you post that while I way saying the one with the cutter at an angle.

                Another thread about them here

                6 January 2022 at 18:26 #578942
                Emgee
                Participant
                  @emgee
                  Posted by Steve Crow on 06/01/2022 18:22:28:

                  Maybe I should have explained a bit more.

                  What I am asking is which design of dovetail cutter would work best?

                  Multi tooth on sides and bottom of cutter.

                  As is often the case I misread your first post, I now understand you are making a dovetail cutting tool with an insert fitted to provide the cutting edge.
                  I thought you were using an insert to cut the angle turning on a lathe.

                  Emgee

                  Edited By Emgee on 06/01/2022 18:35:47

                  6 January 2022 at 22:32 #579001
                  Steve Crow
                  Participant
                    @stevecrow46066
                    Posted by JasonB on 06/01/2022 18:24:52:

                    Did you post that while I way saying the one with the cutter at an angle.

                    Another thread about them here

                    Yes, posts overlapped.

                    Useful thread, thanks.

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