drilling and tapping stainless steel

Thread: drilling and tapping stainless steel

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  1. #1
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    drilling and tapping stainless steel

    I am planning on drilling and tapping several small holes (caseback, faceplate, etc) into a custom stainless steel case.
    I bought some cheap micro drill bits and a tap set on EBay to practice on plastic.
    Even on plastic I bent and broke some taps and bits on a few attempts.
    Probably because I tried using a pin vise hand tool.
    I learned my lesson and bought a drill press.
    Now I wish to buy better/stronger bits and taps.
    Any suggestions where and what to look for?

  2. #2
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    Re: drilling and tapping stainless steel

    Any quality brand ones will do. When drilling, do not put on too much pressure. The object you are drilling in need to be absolutely still.
    When drilling in S/s, you need to use a drilling lubricant.

  3. #3
    Member John MS's Avatar
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    Re: drilling and tapping stainless steel

    Any good hardware store should have drills and taps. Whether they will have the very small size taps used on a watch case may be open to question. You will need a good vice to hold the case when drilling and tapping. Expect that you will have to tap the threads by hand and be sure to use plenty of cutting oil.

  4. #4
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    Re: drilling and tapping stainless steel

    +1 on the lube. If you get stainless too hot, in other works, if it turns blue, it's not stainless anymore...

  5. #5
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    Re: drilling and tapping stainless steel

    And use Slow speed on the machine. This too prevents overheating.

    Tungsten Carbide or maybe Ti-Nitride should be good or the drills.

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