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Thread: Rotary Table to Chuck Threaded Adapter

  1. #1
    Supporting Member jjr2001's Avatar
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    Rotary Table to Chuck Threaded Adapter

    I have a nice 4" rotary table that is just right for my mini mill. However I wanted to use it on my Sherline mill. A little large but it fits my plate.
    I also had the Sherline 3" chuck and an older 3" 4 Jaw import. Both of these chucks were threaded 3/4-16 so my job was obvious.
    The Rotary table had a 5/16-18 allen flat head retaining the shaft of the table. The hole was not threaded all the way through
    the table and was a bit on the large size for the 5/16-18 thread to have a lot of engagement but there was enough. So I made an extra
    long adapter with 5/16-18 on one end that was long enough to engage 3 threads of the original retaining bolt threads. I cut 3 threads from the
    original retaining bolt to give my new 5/16-18 adapter at least 3 good threads. Ran a tap through the entire center of the table.

    The new adapter fits well and I have used it recently to make my new offset center.

    Another note is the 4 jaw import can be mounted 3 ways. There are 4 counter bored holes for T-slots, a groove near the back for tooling plate hold downs, and the new threaded arbor.

    Cheers, JR
    Attached Thumbnails Attached Thumbnails Rotary Table to Chuck Threaded Adapter-img_2053.jpg   Rotary Table to Chuck Threaded Adapter-img_2054.jpg   Rotary Table to Chuck Threaded Adapter-img_2055.jpg   Rotary Table to Chuck Threaded Adapter-img_2056.jpg   Rotary Table to Chuck Threaded Adapter-img_2057.jpg  

    Rotary Table to Chuck Threaded Adapter-img_2058.jpg  

  2. The Following 8 Users Say Thank You to jjr2001 For This Useful Post:

    Hemi (Oct 1, 2018), Home-PC (Oct 11, 2020), Jon (Oct 1, 2018), Miloslav (Oct 1, 2018), PJs (Oct 1, 2018), rossbotics (Oct 4, 2018), Seedtick (Oct 1, 2018), Tonyg (Oct 2, 2018)

  3. #2
    PJs
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    Excellent JR! Quite the Kit and Kadoodle your putting together now!

    2,000+ Tool Plans
    ‘‘Always do right. This will gratify some people and astonish the rest.’’
    Mark Twain

  4. The Following User Says Thank You to PJs For This Useful Post:

    jjr2001 (Oct 1, 2018)

  5. #3
    Supporting Member jjr2001's Avatar
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    Yes, I do like to make stuff! My last steam engine (model of course) was easy to do in my little shop. Problem now is "what tool do I use"? But even with all the tooling I have it seems like I always need one more!

    Cheers, JR

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    PJs (Oct 1, 2018)

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    Supporting Member Hemi's Avatar
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    NICE JR!!!!! I would LOVE to find a 3 inch rotary table!!!!! (Only small accessory I'm missing for my Unimat Mill right now!!!!) Know a good place to find one by chance?

  8. The Following User Says Thank You to Hemi For This Useful Post:

    jjr2001 (Oct 2, 2018)

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    https://www.ebay.com/itm/Rotary-Tabl...gAAOSwkiRbdVvz

    Ships from India and quite inexpensive.
    Cheers, JR

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

    Hemi (Oct 2, 2018), PJs (Oct 2, 2018)

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    THANKS JR!!!!!! I'll be looking into that one! GAWD how I love this machinist forum!!!!! You guys are GREAT!

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    jjr2001 (Oct 2, 2018)

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    My favorite forum too.

    Cheers, JR

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    Hemi (Oct 2, 2018)

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    Thanks jjr2001! We've added your Rotary Table Adaptor to our Milling category,
    as well as to your builder page: jjr2001's Homemade Tools. Your receipt:






    2,000+ Tool Plans

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    jjr2001 (Oct 4, 2018)

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