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Thread: Lathe Chuck Adapter for holding Bolts on Sherline, 100mm and 125mm Prints Included

  1. #1
    Supporting Member jjr2001's Avatar
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    Lathe Chuck Adapter for holding Bolts on Sherline, 100mm and 125mm Prints Included

    This is nothing new, just my version for 3 different size chucks.
    These adapters will allow you to hold a bolt head within the lathe chuck.
    Note that the bolt head is not gripped by the jaws at all but instead
    the round shaft of the bolt or part is what the jaw will clamp to.
    Not just bolt heads but a lot of parts that have a dimension that will not
    allow the part to fit securely in the chuck jaws. These adapters will allow that.

    I made mine out of 12L14 steel but aluminum or brass would work .
    Brass or aluminum would make them "soft" jaws.

    All 6 corners can be used for different diameter screws or stock
    that you are working with. To use them just fix one on each jaw with the set screw.
    Close the chuck so that all jaws touch in the center. Next just drill out the center
    with a drill bit that will accommodate your part. I like to keep this diameter just
    a bit under the bolt or shaft diameter.

    You can see one example of a 4-40 allen cap screw being turned into a Dog Point.
    A second example is a 1/2-20 bolt with a flattened end for another project.

    There are a lot of holes that need to be tapped. The last picture shows the tapping stand
    I used to tap them. Here is the link to the tap stand build.
    Tapping Stand or Hand Tapper
    Attached Thumbnails Attached Thumbnails Lathe Chuck Adapter for holding Bolts on Sherline, 100mm and 125mm Prints Included-img_3354.jpg   Lathe Chuck Adapter for holding Bolts on Sherline, 100mm and 125mm Prints Included-img_3350.jpg   Lathe Chuck Adapter for holding Bolts on Sherline, 100mm and 125mm Prints Included-img_3362.jpg   Lathe Chuck Adapter for holding Bolts on Sherline, 100mm and 125mm Prints Included-img_3363.jpg   Lathe Chuck Adapter for holding Bolts on Sherline, 100mm and 125mm Prints Included-img_3364.jpg  

    Lathe Chuck Adapter for holding Bolts on Sherline, 100mm and 125mm Prints Included-img_3365.jpg   Lathe Chuck Adapter for holding Bolts on Sherline, 100mm and 125mm Prints Included-img_3366.jpg   Lathe Chuck Adapter for holding Bolts on Sherline, 100mm and 125mm Prints Included-img_3367.jpg   Lathe Chuck Adapter for holding Bolts on Sherline, 100mm and 125mm Prints Included-img_3348a.jpg  
    Attached Files Attached Files
    Download plans for chucks.
    Last edited by jjr2001; Nov 10, 2024 at 11:35 AM.
    Back to the shop.

  2. The Following 4 Users Say Thank You to jjr2001 For This Useful Post:

    emu roo (Nov 12, 2024), Jon (Dec 1, 2024), mr mikey (Nov 13, 2024), philippacificnw (Nov 18, 2024)

  3. #2
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    Thanks jjr2001! We've added your Bolt Holding Adaptors to our Lathe Accessories category,
    as well as to your builder page: jjr2001's Homemade Tools. Your receipt:



    Download plans for chucks.
    New plans added on 12/06/2024: Click here for 2,617 plans for homemade tools.

  4. #3
    Supporting Member Saltfever's Avatar
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    Thank you for the idea and hi quality pics, JJ.

    Tightening on a shim and drilling exact diameter will allow good clamping without drilling undersize.

    Name:  Adapters.JPG
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    jjr2001 (Nov 12, 2024)

  6. #4
    Supporting Member jjr2001's Avatar
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    That is a good idea Saltfever. It is not always possible to find a drill just the right size under.


    Download plans for chucks.
    Back to the shop.

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