. .
  1. Good day all.

    I am trying to find a new key for my chuck, but I don't know where to start.

    All the standard chuck keys I have are way to small for this chuck.

    Here are all the details stamped on the chuck.

    Cardinal Mk II
    Pat No 651588
    D
    1/2"
    No33 Taper
    CA12

    Thanks for your time.
    "If first you don't succeed, redefine success"

  2. #2
    Measure the size of the (probably) square hole in the chuck for the key, then you should be able to find one to fit. If not I can make one.

  3. #3
    This may help? The chap modified a K4 Jacobs chuck key for his MT3 tapered drill chuck. Looking at though you may get away with a 16mm chuck key?

    http://www.practicalmachinist.com/vb...-3-4-a-172002/
    If the nagging gets really bad......Get a bigger shed:naughty:

  4. #4
    Or contact these for the spec, the manufactured the cardinal many years ago :tup:

    BROOKE CUTTING TOOLS (UK) LTD

    • ALL ENQUIRIES-MAIN SWITCHBOARD, HELLABY IND EST, DENBY WY, HELLABY, ROTHERHAM
      S66 8HU ROTHERHAM , SOUTH YORKSHIRE

      Phone : 01709 314500
      Fax : 01709 314501
      E-mail : Send messagewww.brooke.co.uk
    If the nagging gets really bad......Get a bigger shed:naughty:

  5. #5
    I should have noticed from the original post that it's a drill chuck, not a lathe chuck .

  6. #6
    I have a 1/2" cardinal chuck, it's physically the same size as the 1/2" jacobs chucks
    I have and uses the same key. I think the jacobs are type 34. I will write down the key
    number and measure the diameter tomorrow.

  7. graffian: did you have any luck finding out any details regarding the key?

    The chuck pilot hole seems to be 5/16 [0.3125"] (7.9375mm).
    "If first you don't succeed, redefine success"

  8. #8
    Yes I had a look, I couldn't find the cardinal chuck but the key I use on jacobs 34 chucks came with the
    cardinal chuck. The key has a 5/16 pin and 11 teeth. The key I have is a jacobs and just has
    a 3 on it, but it goes with 34 chucks so it shouldn't be a problem finding one.

    The next size down key I have, which is for jacobs 32 chucks, has a 1/4 pin and 9 teeth.
    The next size has a .375pin and 12 teeth, that is for the jacobs 36 chuck.

  9. #9
    New to this forum so somebody may be able to help. My primary interest is Woodturning but I have a Myford ml 7 as well. I recently got a Meddings MB4 mark 2 drill , very dirty and uncared for but all parts in good order. Everything now back 'as new' except chuck.


    It had a Cardinal mark 2 chuck which needs to be disassembled and cleaned. Does anyone have any idea how to do this. On the back of the chuck there is a series of small holes in a circle. Not sure whether it can be 'drifted' apart or if there are threads in there somewhere.
    Here are some photos
    Click image for larger version. 

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    Last edited by Cregg; 22-01-2017 at 06:19 PM. Reason: add photo

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