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M6 x 0.75 LH metric thread

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M6 x 0.75 LH metric thread

Home › Forums › Beginners questions › M6 x 0.75 LH metric thread

Viewing 7 posts - 1 through 7 (of 7 total)
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  • 10 June 2023 at 13:38 #648082
    Peter Simpson 3
    Participant
      @petersimpson3

      I need to make some M6 x 0.75 LH metric screws. Easy with the correct die, As these dies are like hens teeth. I looked to my imperial Colchester Bantam to cut the threads. As the lathe is new to me I'm not sure as to the change wheels and gear box lever positions to select to cut this metric thread. I have a full set of change wheels. Could somebody give me some advice on the correct lathe set up please.

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      10 June 2023 at 13:38 #11493
      Peter Simpson 3
      Participant
        @petersimpson3
        10 June 2023 at 14:43 #648086
        Russell Eberhardt
        Participant
          @russelleberhardt48058

          This little Windows program might help:

          **LINK**

          You just have to enter your leadscrew pitch and list all the change wheels you have and it will come up with a few suggested setups.

          Russell

          10 June 2023 at 17:52 #648102
          Nick Hughes
          Participant
            @nickhughes97026

            Have you checked out the replies to your earlier posing for a die supplier?

            If not, have a look!

            If you have and the replies are not suitable, then a reply stating this in that post, would be appreciated (at least by me).

            10 June 2023 at 18:55 #648108
            Peter Simpson 3
            Participant
              @petersimpson3

              I purchased a die from China, not sure what quality it will be. This afternoon I set up the Colchester and cut a good M6 x 0.75 LH thread. So the die may be good to clean up the single point cut thread.

              10 June 2023 at 19:40 #648112
              Emgee
              Participant
                @emgee

                Cutwell sell Full Form inserts in most thread sizes, LH are listed, saves using a die to form the crests.

                Emgee

                11 June 2023 at 16:07 #648195
                Roger B
                Participant
                  @rogerb61624

                  This a reasonable quality M6 x 0.75 LH die:

                  Round Dies, left, Mf, DIN 223 (DIN EN 22568), HSS-G, 6 x 0.75 » VÖLKEL SHOP (voelkel-shop.com)

                  £16.07, the devil is probably in the postage.

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