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Thread: A Hex Drive Chuck

  1. #1
    Supporting Member rgsparber's Avatar
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    A Hex Drive Chuck

    For light duty work, it is handy to be able to drop a drill chuck into an electric screwdriver. By repurposing a spare drill chuck plus machining a spare hex bit, I made the desired tool in just a few minutes.

    If you are interested, please see

    https://rick.sparber.org/HexDriveChuck.pdf


    Your comments are welcome. All of us are smarter than any one of us.


    Thanks,

    Rick

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    Rick

  2. The Following 6 Users Say Thank You to rgsparber For This Useful Post:

    Altair (Apr 13, 2020), Jon (Apr 17, 2020), mklotz (Apr 13, 2020), NortonDommi (Apr 13, 2020), Paul Jones (Apr 20, 2020), Seedtick (Apr 14, 2020)

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    Supporting Member mklotz's Avatar
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    I have two chucks of that style, coincidentally both set up as mondo pin vises. Also, somewhere along the line I picked up another chuck of that style that already had a 1/4" hex on the screw used to close the jaws (like what you made).

    It occurred to me that that latter chuck could be used in my electric screwdriver but, so far, I haven't encountered a job where that would seem to make sense. I have a very large collection of 1/4" hex bits so maybe that's why I can't find a reason to use something that requires the chuck.

    Could you please offer some examples of work you might do that requires a chuck in the screwdriver?

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    Paul Jones (Apr 20, 2020)

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    Supporting Member Altair's Avatar
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    Thanks rgsparber! We've added your Hex Drive Chuck to our Machining category,
    as well as to your builder page: rgsparber's Homemade Tools. Your receipt:




  6. #4
    Supporting Member rgsparber's Avatar
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    Quote Originally Posted by mklotz View Post
    I have two chucks of that style, coincidentally both set up as mondo pin vises. Also, somewhere along the line I picked up another chuck of that style that already had a 1/4" hex on the screw used to close the jaws (like what you made).

    It occurred to me that that latter chuck could be used in my electric screwdriver but, so far, I haven't encountered a job where that would seem to make sense. I have a very large collection of 1/4" hex bits so maybe that's why I can't find a reason to use something that requires the chuck.

    Could you please offer some examples of work you might do that requires a chuck in the screwdriver?
    I have one major use - to drive my hand crank coffee burr when it is set for espresso.

    Rick
    Rick

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    Supporting Member mklotz's Avatar
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    Quote Originally Posted by rgsparber View Post
    I have one major use - to drive my hand crank coffee burr when it is set for espresso.

    Rick
    Thanks for the response.

    The high torque, low speed characteristics of the screwdriver have numerous applications. I've already used mine to drive a scissor auto jack...

    Car jack speeder

    but that could be done without the need for a chuck.

    Some other possible uses for the chuck version...

    Slowly rotate parts while spray painting them.
    Wire twisting.
    Rotate a fishing line drier. (Drying lines after use helps prevent rot.)
    ---
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    That looks about right - Mediocrates

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    rgsparber (Apr 14, 2020)

  9. #6
    Supporting Member rgsparber's Avatar
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    Quote Originally Posted by mklotz View Post
    Thanks for the response.

    The high torque, low speed characteristics of the screwdriver have numerous applications. I've already used mine to drive a scissor auto jack...

    Car jack speeder

    but that could be done without the need for a chuck.

    Some other possible uses for the chuck version...

    Slowly rotate parts while spray painting them.
    Wire twisting.
    Rotate a fishing line drier. (Drying lines after use helps prevent rot.)
    I've tried to use it to quickly open or close a C clamp but the cross bar would not cooperate. I need some way to force it to stay in the center while I spin it.

    Rick
    Rick

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    Supporting Member tonyfoale's Avatar
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    Rick,

    Unless all your photos are flipped left to right, they show a LH thread. That would be wrong for a normal chuck spinning clockwise (from the driving end). So is there something special with this type of chuck that allows or maybe insists on a LH thread?

  11. #8
    Supporting Member rgsparber's Avatar
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    Quote Originally Posted by tonyfoale View Post
    Rick,

    Unless all your photos are flipped left to right, they show a LH thread. That would be wrong for a normal chuck spinning clockwise (from the driving end). So is there something special with this type of chuck that allows or maybe insists on a LH thread?
    Tony,

    No LH threads, just flipped pictures to make them fit better.

    Rick
    Rick

  12. #9
    Supporting Member tonyfoale's Avatar
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    Quote Originally Posted by rgsparber View Post
    Tony,

    No LH threads, just flipped pictures to make them fit better.

    Rick
    Rick,

    If one pic was like it I would have just assumed that it was flipped and not asked, but as all the pix showed LH I wondered if there was some magic in those chucks. Anyway you have satisfied my curiousity as well as restored my belief in the correct order of the universe.

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    rgsparber (Apr 15, 2020)

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    Supporting Member mklotz's Avatar
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    Quote Originally Posted by rgsparber View Post
    I've tried to use it to quickly open or close a C clamp but the cross bar would not cooperate. I need some way to force it to stay in the center while I spin it.

    Rick
    I wonder if something like this would work...

    Imagine a cylindrical metal disk attached to a 1/4" hex shank. At locations zero and 180 degrees this disk has pairs of rubber fingers pointing up perpendicular to the plane of the disk.

    In use the rubber fingers slip over the C-clamp cross bar preventing it from sliding from side to side. The fingers are stiff enough to transmit the rotary motion of the screwdriver to the C-clamp screw.

    On reflection, replace the disk and fingers with a hockey puck that has a diametrical V-groove to engage the cross bar and a central hole large enough to "swallow" the enlarged clamp screw end through which the cross bar passes. That would be simpler to fabricate and you seem to have a large supply of pucks.
    ---
    Regards, Marv

    Failure is just success in progress
    That looks about right - Mediocrates

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