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What are the best drill bits

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  • #46
    Tap magic

    I have had the same set of bits for years. Drill doctor to sharpen and the best cutting fluid around. Tap magic. American company!

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    • #47
      Helpful thread.

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      • #48
        If you are hand drilling, use air drills. They don't develope full torque at near zero rpm like an electric motor. I use 1/8 double ended split point 135 degree bits for almost all of my piloting. Over the 40+ years I've learned to put my full 200 lbs on them and not break them. I also use 3/16 and 1/4 s in the same drills. The cobalt bit sets are much harder than titanium coated, just not as tough. A drill doctor, cutting fluid and enough pressure for your bit size to keep it curling metal will keep you on a set of bits for a lot of years. I don't usually pilot with a resharpened bit, they will walk a tad in most cases. Heat kills! Keep the pressure high and the speed down. And I totally agree on the tap magic.
        Last edited by shootist2; 10-05-2017, 01:32 AM.

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        • #49
          We have 1000s of bits here in the barns, shop --- picked up an old Darex "factory / industrial" drill sharpener from a company auction and probably won't need to buy bits ever again.
          ESAB TIG 252 with Miller CoolMate
          Spectrum 875
          Diversion 180
          Oxy-A (Harris, ESAB, Ox Weld)
          Miller 252
          MM 211
          CST 280
          Trailblazer - Kubota

          http://www.blackdiamondblooms.com/

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          • #50
            Originally posted by jcb View Post
            What drill bits are best to get if you are drilling metal ? I've seen Titanium, Zirconium Nitride, Cobalt, H.S.S. Some indicate "high speed", some are coated with the above metals only. I do know that some are much more expensive and stay sharp longer than others but I have no idea what type they are. Is price the only deciding factor ?

            JCB
            You may look at amazon. I bought a Craftsman 9-64085 Drill Bit from them & that's really good!!

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