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Thread: How to make 3/4" double hex?

  1. #1
    rustamd Guest

    Default How to make 3/4" double hex?

    I need to make 3/4" male double hex, anyone knows how I could make these on mostly manual machines? Got mill & lathe

    Russ

  2. #2
    Join Date
    Oct 2010
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    Michigan
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    Default

    Happy to help you. Ermm, what's a double hex?

    Is that a 12 sided polygon?

  3. #3
    Join Date
    Mar 2005
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    Toronto
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    Default

    ....deleted....thought he meant double helix ala two start thread
    .

  4. #4
    Join Date
    Aug 2003
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    856

    Default Double Hex

    Obtain a rotary broach and get busy.

    JRW

  5. #5
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    Aug 2006
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    Beaverton, OR
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    Default

    Piss of two witches?

  6. #6
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    Nov 1999
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    SE OZ
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    1,966

    Default 12-point?

    Quote Originally Posted by rustamd
    I need to make 3/4" male double hex, anyone knows how I could make these on mostly manual machines? Got mill & lathe

    Russ
    Russ.

    Do you mean a "12-point" male head that fits into a standard 12-point (female?) socket?

  7. #7
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    Nov 2009
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    Winchendon MA
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    Get a 12 point 3/4" socket push a gob of clay into it pull the clay out and look at the end of it it will give an idea of what you want, when you go to mill the blank you'll have to keep the corner of the end mill above the center, mill 12 flats try to keep your cuts small , move over to the other side and cut 12 more flats keep measuring and cutting til you get to the final size. your blank should be what you want for a final size. Just my $11.27 worth

  8. #8
    Join Date
    Sep 2009
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    817

    Default

    Use a collet and a hex collet holder.

  9. #9
    Join Date
    Aug 2009
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    Charlottesville, VA, USA
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    Default

    Quote Originally Posted by baldysm
    Happy to help you. Ermm, what's a double hex?

    Is that a 12 sided polygon?
    Worse. If he is asking for what I think he is. It is what you get when you superimpose two 6 sided polygons after rotating one 30 degrees. Stuff some clay in a 12 point socket, remove it and that is what you are trying to make. It has sharp inside corners that can be a pain to make. But can be milled if you don't have a flat shoulder requirement.

    Mount part in Rotary table, dividing head, or spin indexer, that can divide a revolution into 12 parts with the axis horizontal parallel to X on the mill. Calculate the offset, then take 12 swipes with an endmill (mill spindle vertical) rotating the part each time. Then offset the Y axis an equal distance on the other side of the part axis and take 12 more swipes, indexing each time. If you prefer, you can index only 12 times and move the table around more. If need be, take roughing and finishing passes.

  10. #10
    Join Date
    Aug 2006
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    Taylorsville Ky
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    5,881

    Default

    I'll take a guess, use a mill with a dividing head and tailstock and four flute end mill. Do the math and start cutting.
    It's only ink and paper

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