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Thread: Sorby chuck

  1. #1

    Sorby chuck

    I have a Sorby chuck 7/8 14 tpi my lathe spindle size is 1 inch 8tpi does anyone have an adapter like this. I canít seem to find one Thanks Ken

  2. #2
    Join Date
    Aug 2007
    Location
    Hampton Roads, Virginia
    Posts
    888
    Possibly not your best bet but Best Wood Tools can make you one. Everything I'm seeing adapts from 7/8 x 14 machine spindle to 1 x 8 (or other) accessory.

    custom adapters link
    RD

  3. #3
    Thanks I ask about that they want $69 Iím from Canada so with exchange and shipping it would be around $125 hoping for something cheaper

  4. #4
    My chuck is 7/8 14 tpi could I tap that to 1 inch 8 tpi do you think that would be possible. Thanks Ken

  5. #5
    Join Date
    Sep 2015
    Location
    San Diego, Ca
    Posts
    1,638
    I think that it might be possible, assuming that the chuck has enough "meat" at the threaded end . I googled the 1 x 8 tap drill size and they recommended a 7/8" drill. But I wouldn't recommend drilling that size without a drill press and a vice to hold the chuck. Also, you'll have to buy a tap and tap holder. Plus you'll need to know the "best practices" for drilling and tapping. If you've never done it before, talk to someone with machining experience or have them do it for you.

  6. #6
    Thanks Brice Iím going to try that it seams to be my best option. If it works great there is a shop not far from me that can do that.

  7. #7
    Join Date
    Mar 2003
    Location
    Ontario, Canada
    Posts
    302
    I hope from your last comment, Ken, you are going to take it to a shop. They will know if it is feasible and they (hopefully) will get the threads true. Even though the registration of the chuck is not from the threads themselves but the shoulder that butts a shoulder on your spindle typically, if they are out you will have chuck wobble and that wobble will translate into serious wobble at the outer diameter of a larger bowl.

  8. #8
    Join Date
    Nov 2006
    Location
    Northeastern OK
    Posts
    289
    Is it possible to simply buy the appropriate chuck adapter from Sorby? Their website shows a 1" UNC adapter for the Patriot chuck.

  9. #9
    Join Date
    Mar 2003
    Location
    Ontario, Canada
    Posts
    302
    Unfortunately, he doesn't say what model his chuck is and I got the impression it was a fixed-thread model but....

  10. #10
    Join Date
    Nov 2007
    Location
    Calgary
    Posts
    12
    Found this one for $25 Canadian. Oops, it adapts wrong direction in
    https://www.amazon.ca/Faceplate-Adap.../dp/B08BJD69LD

    James
    Last edited by James Ley; 11-21-2023 at 1:00 PM.

  11. #11
    Is the OP sure his chuck is not an adapter style?
    I guess I've never seen a direct thread 7/8-14 before

  12. #12
    I bought this used I believe sorby cut it to 7/8 at customers request itís a precision combination chuck # 900 very old. Anyway I took it to a shop today and he made it to fit my 1 inch spindle. Happy with the job Thank for all the help. Ken

  13. #13
    Join Date
    Sep 2015
    Location
    San Diego, Ca
    Posts
    1,638
    I agree with Bill Howett to take the chuck to a machine shop.

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