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What rpm for a 60mm face mill and slitting saws?

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What rpm for a 60mm face mill and slitting saws?

Home › Forums › Beginners questions › What rpm for a 60mm face mill and slitting saws?

Viewing 5 posts - 1 through 5 (of 5 total)
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  • 16 August 2011 at 23:30 #73476
    John Coates
    Participant
      @johncoates48577
      Hi all
       
      Got myself a 60mm Sandvik Coromant indexable face mill from ebay but am not sure what rpm to run it at in my mill
       
      Same issue with slitting saws – what speed should I run them at? After almost blunting one after it got very hot I need to know how to avoid this in the future!
       
      regards John
      16 August 2011 at 23:30 #5620
      John Coates
      Participant
        @johncoates48577
        16 August 2011 at 23:44 #73478
        Chris Trice
        Participant
          @christrice43267
          Depends what material you’re cutting.
           
          Speeds for HSS tooling at 60mm:
           
          Steel & Cast Iron 70rpm
          Brass/ Bronze/Free Cutting Steel 160 rpm
          Aluminium 240 rpm.
           
          Insert tools you can generally run faster.
           

          Edited By Chris Trice on 16/08/2011 23:50:32

          17 August 2011 at 10:20 #73488
          Peter Tucker
          Participant
            @petertucker86088

            Hi John,

            High speed steel slitting saws can get hot quickly, with the exception of cast iron I would always run them wet. Flood with wetable oil for steel, and a continuous spray of kerosene for aluminium and copper alloys.

            As for speed high speed steel cutting mild steel should have a tooth speed of no more than 100 feet per minute, harder steels and cast iron perhaps half that speed, copper alloys probably a little faster than 100 fpm., and aluminium perhaps 200 fpm.

            If as I suspect your face mill has tungsten carbide cutters, then they will probably “like” to be run a lot faster (perhaps up to 10 times faster ), and you may not notice any difference between running them wet and dry.

            Good luck, and happy milling.

            Peter.

            17 August 2011 at 14:15 #73497
            Ian S C
            Participant
              @iansc
              John, I’v got Arnold Thorp’s book “Vertical Milling in the Home Workshop” . For a 2 1/2″ HSS slitting saw; Mild steel 55rpm
              Brass 95rpm
              light alloy 155rpm
              these speedsare lower than you’ll find in a lot of places, but are suggested for long life of tools. for cast iron , and harder steels you want slower speed, or smaller saw.
                  As far as the face cutter goes I’ll tell you what I was told by an “expert”told me when I bought mine—“Just give it about 2 mm depth of cut, 900rpm, and crank like hell”, well I halve both those figures, and don’t crank quite that fast, it works OK for me, actually I think the usual speed I use is 520 rpm.   Ian S C

              Edited By Ian S C on 17/08/2011 14:25:19

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