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Thread: Shallow hole tapping

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  1. 03-12-2013, 04:44 PM #1
    Tippy1
    Tippy1 is offline Registered
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    Shallow hole tapping

    Interesting project:

    We have to tap 100+ #10-32 blind holes (0.200" depth) in A36 (low carbon plate) in a VMC .

    Which would be better ?:

    Bottoming form tap

    Bottoming spiral flute tap
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  2. 03-12-2013, 05:38 PM #2
    Geof
    Geof is offline Gold Member
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    Quote Originally Posted by Tippy1 View Post
    .......Which would be better ?:........
    Let somebody else do the job.

    A36 can sometimes be like machining cookie dough with the occasional nut embedded in it, it doesn't cut smoothly in my experience. I would go for form tap and use a realy good lubricant.
    An open mind is a virtue...so long as all the common sense has not leaked out.
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  3. 03-12-2013, 10:24 PM #3
    viking73
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    Thread mill.
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  4. 03-13-2013, 02:25 PM #4
    neilw20
    neilw20 is offline Member
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    Quote Originally Posted by viking73 View Post
    Thread mill.
    I second that.
    Super X3. 3600rpm. Sheridan 6"x24" Lathe + more. Three ways to fix things: The right way, the other way, and maybe your way, which is possibly a faster wrong way.
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  5. 03-13-2013, 03:01 PM #5
    viking73
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    Took a brief look this morning for one, Emuge has them.

    I'm sure there are others as well.
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