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Thread: how to get a tap out brook off

  1. #1
    Join Date
    Oct 2001
    Posts
    170

    Exclamation how to get a tap out brook off

    I have a 1/4 -20 tap brook off in stainless that is 3/4 thick, so how do I get it out Brett

  2. #2
    Join Date
    Dec 2010
    Location
    Finland
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    2,709

    Default

    With an EDM.

  3. #3
    Join Date
    Oct 2001
    Posts
    170

    Default thanks but

    I do not have a edm Brett

  4. #4
    Join Date
    Jan 2003
    Location
    Chilliwack, B.C.
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    9,543

    Default

    Speak very, very kindly to it, and offer it a hole in some very expensive metal

    On a more serious note, I think you can dissolve it out- seems to me someone posted about that some months ago.

    I broke a tap today- not really torquing on it at the time, but had been previously. All I could do was knock off the sharp end that was sticking up and leave it like that. Three out of four bolts will hold-

    The best stuff I've found to make tapping easier, in all metals, is AnchorLube G771. I like that it doesn't run all over the place, doesn't smell, and it works.

  5. #5
    Join Date
    Oct 2002
    Location
    Champaign-Urbana, Illinois
    Posts
    820

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    Is it a through hole? If so, you can break it apart with a punch and some patience. Hit it hard and try to shatter it, then pick out what you can and repeat the process until the tap is out. You'll probably want to chase the threads afterward with a fresh tap. This will probably work ok with a blind hole too, but the pieces will be harder to remove.
    Stuart de Haro

  6. #6
    Join Date
    Nov 2009
    Location
    Gold Country, CA
    Posts
    146

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    Is the part expensive you are working on. Could remake it. Stinks but always an option. I've never tried but what about a carbide drill.

    Might find a shop that has edm. I bought a nice tap burner which is basically an edm drill press that can burn them out. You could also post location and perhaps someone could help direct you.

  7. #7
    Join Date
    Mar 2011
    Location
    Iowa
    Posts
    716

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    I'd first try to weld a nut to it. If it's a through hole and that didn't work, I'd blow it out with the torch.

  8. #8
    Join Date
    May 2007
    Location
    Live Oak, TEXAS
    Posts
    1,540

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    Left handed drills work great to remove taps. Or as stated before, shatter it with a punch or weld a nut onto it if possible.

  9. #9
    Join Date
    Mar 2005
    Location
    Oroville, WA
    Posts
    11,018

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    If you have the time, patience, and a fondness for DIY, http://modelenginenews.org/meng/edm/index.html

    Otherwise, a Walton tap extractor might work:

    http://www.waltontools.com/products/...achsc-hand.htm

  10. #10
    Join Date
    Aug 2006
    Location
    Beaverton, OR
    Posts
    7,269

    Default

    For aluminum you can boil the part in a solution of Alum and it will dissolve the tap out over time. Don't know if it will attack the stainless or not.

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