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Free cutting mild steel

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Free cutting mild steel

Home › Forums › Materials › Free cutting mild steel

Viewing 9 posts - 1 through 9 (of 9 total)
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  • 17 June 2019 at 10:40 #414641
    Glyn Davies
    Participant
      @glyndavies49417

      I want to make some grinding wheel adapters for my universal cutter grinder, which involves a lot of turning 50mm bar down to 20mm. Much of the BMS I've bought in the past does not really turn well using HSS tools on my little Myford so I'd like to get some mild steel that is truly free cutting.

      Should I be asking for EN1a Leaded as being the free-est cutting BMS that money can buy?

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      17 June 2019 at 10:40 #29926
      Glyn Davies
      Participant
        @glyndavies49417
        17 June 2019 at 10:56 #414646
        ega
        Participant
          @ega

          You could follow the advice for the Quorn and use Loctite to combine the components, perhaps.

          If there is a flange next to a paper "blotter" I would recommend (free-cutting) stainless steel to avoid rusting.

          17 June 2019 at 10:57 #414648
          colin hawes
          Participant
            @colinhawes85982

            Yes….and make sure you keep the tools sharp. Colin

            17 June 2019 at 11:03 #414650
            SillyOldDuffer
            Moderator
              @sillyoldduffer

              Simple answer is 'yes', but I suspect there may be more to it. I'd expect a little Myford and HSS to cope reasonably well with BMS. Although BMS isn't wonderful, it shouldn't be awful. Usually it's the finish that suffers.

              Have to say the first time I turned Free-cutting I was delighted – it does what it says on the tin. However, if Free-cutting doesn't fix the problem, ask again. There are several reasons why a lathe might struggle other than the metal.

              Dave

              17 June 2019 at 11:07 #414652
              Martin Kyte
              Participant
                @martinkyte99762

                GLR Kennions free cutting machines really well.

                Martin

                17 June 2019 at 11:23 #414656
                Hopper
                Participant
                  @hopper
                  Posted by Glyn Davies on 17/06/2019 10:40:09:

                  … turning 50mm bar down to 20mm. Much of the BMS I've bought in the past does not really turn well using HSS tools on my little Myford ..

                  That's about six cuts of about 2.5mm deep each. Easy peasy on a Myford with HSS. Sharpen your toolbit as per LH Sparey's instructions for knife tool in "The Amateur's Lathe".

                  17 June 2019 at 15:44 #414693
                  Ian S C
                  Participant
                    @iansc

                    I find no difficulty turning hot rolled "mild Steel"(no spec) with a fairly worn Box-Ford A using HSS or carbide tools.

                    Ian S C

                    17 June 2019 at 17:20 #414705
                    Glyn Davies
                    Participant
                      @glyndavies49417

                      Thanks for the replies – I'll grind a right hand knife tool with 55 degrees top rake and give it a go with whatever EN1a steel I find.

                      I think a 100 thou depth of cut is going to make it chug a bit though!

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