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Straight flute end milling cutters

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Straight flute end milling cutters

Home › Forums › Workshop Tools and Tooling › Straight flute end milling cutters

Viewing 6 posts - 1 through 6 (of 6 total)
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  • 24 October 2013 at 01:33 #133515
    jonathan heppel
    Participant
      @jonathanheppel43280

      They have their uses, particularly resisting "dig in" but now seem to be obsolete to the extent of only old stock being still available. Can anyone shed any light on this?

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      24 October 2013 at 01:33 #17202
      jonathan heppel
      Participant
        @jonathanheppel43280
        24 October 2013 at 01:43 #133516
        julian atkins
        Participant
          @julianatkins58923

          i use them all the time – they are in effect a superior 'D' bit. no idea why they are as you say 'obsolete' though ive no idea if this is actually the case

          cheers,

          julian

          24 October 2013 at 09:33 #133523
          Bazyle
          Participant
            @bazyle

            What about wood router bits? Typically straight flute and nowadays probably just as tough material at least for non ferrous use.

            As with drills when someone invented a cheap way of making them with spiral flutes the straight version became 'old hat' even if it had advantages for some applications. For milling cutters the Clarkson screwed shank removed the problem of pull out. So now you need a process that needs tens of thousands to justify making something less universally usefull.

            24 October 2013 at 12:33 #133534
            Speedy Builder5
            Participant
              @speedybuilder5

              I was amazed how quickly oak took the edge off milling cutters. I was making a big CD rack out of 1" oak planks and half housing all the joints (64 cuts 1" x 4" ). The flutes were blunt after the first 20 or 30 joints.

              24 October 2013 at 18:35 #133560
              jonathan heppel
              Participant
                @jonathanheppel43280

                By "dig in" I meant more workpiece lift rather than cutter drop in marginal workholding situations. However, since you can achieve the same effect by grinding zero or negative rake on the edges of helical cutters and as you say, Bazyle, they probably cost the same, then why bother especially since chip clearance cannot be as good.

                Er, I think I've just answered my own question. Oh dear, embarrassment.

                Thanks guys for helping me think it through.

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