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Thread: Drill Bit for Dimpling Stainless Barrel

  1. #11
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    Quote Originally Posted by SomeOtherGuy View Post
    Drilling a dimple isn't rocket science, nor is it making a flawless cube with nothing but a file (as used to be introductory training for machinists in Germany).
    It’s actually done here in America too, as of 2017, except we were allowed .003” tolerance on all dimensions.

  2. #12
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    What size bit do you guys use?

  3. #13
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    Normally an 11/64". Go slow, maybe a drop of oil per dimple. Shallow yet close to the diameter of the bit should suffice. Might start with a 7/64 after you center punch. Here you go; this works. https://www.youtube.com/watch?v=NufnAnjxQlE

    As stated, a carbide isn't necessary if you can find an otherwise quality bit. Short bit preferred.

    Same dude shows a jig being used if interested. https://www.youtube.com/watch?v=PMm6nieDP2M
    Last edited by bamashooter; 03-25-19 at 18:02.

  4. #14
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    lefty223 is right. Prick punch to mark spot, Center punch to widen the previous punch mark, so the drill does not wander. Lastly, drill dimple with a center drill. Best to use a drill press, rather than free hand. Use WD or aero-kroil, or cutting fluid, to keep the bits cool.

  5. #15
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    I was planning on getting a 5/32” bit. I have a dimpling jig.

  6. #16
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    Sounds like you're gtg. Good luck (not needed).

  7. #17
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    Quote Originally Posted by GH41 View Post
    Coffee hadn't kicked in yet. I assumed he wanted to dimple a barrel like this.
    That's what I thought too.
    "What would a $2,000 Geissele Super Duty do that a $500 PSA door buster on Black Friday couldn't do?" - Stopsign32v

  8. #18
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    Quote Originally Posted by titsonritz View Post
    SIONICS dimple is the same, probably a flat face drill bit.
    https://www.mscdirect.com/product/details/80381601
    Correct tool would be a 4 flute end mill.

  9. #19
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    Center cutting end mill.

  10. #20
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    Quote Originally Posted by khc3 View Post
    Center cutting end mill.
    True but I usually will start the hole with a drill bit then use the end mill to square up the bottom.

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