Cardinal Mk II Chuck Key

This is a discussion on Cardinal Mk II Chuck Key within the General Discussion forums.

  1. #1
    Mad Professor's Avatar
    Lives in Isle Of Wight, United Kingdom. Last Activity: 4 Weeks Ago Has been a member for 5-6 years. Has a total post count of 236. Received thanks 9 times, giving thanks to others 1 times.
    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. 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
    Swarfing's Avatar
    Lives in Swindon, United Kingdom. Last Activity: 4 Days Ago Has been a member for 4-5 years. Has a total post count of 996. Received thanks 50 times, giving thanks to others 3 times. Is a beta tester for Machinists Network features.
    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
    Swarfing's Avatar
    Lives in Swindon, United Kingdom. Last Activity: 4 Days Ago Has been a member for 4-5 years. Has a total post count of 996. Received thanks 50 times, giving thanks to others 3 times. Is a beta tester for Machinists Network features.
    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. I should have noticed from the original post that it's a drill chuck, not a lathe chuck .

  6. #6
    graffian's Avatar
    Lives in surrey, United Kingdom. Last Activity: 2 Weeks Ago Has been a member for 5-6 years. Has a total post count of 73. Received thanks 2 times, giving thanks to others 1 times.
    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. #7
    Mad Professor's Avatar
    Lives in Isle Of Wight, United Kingdom. Last Activity: 4 Weeks Ago Has been a member for 5-6 years. Has a total post count of 236. Received thanks 9 times, giving thanks to others 1 times.
    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
    graffian's Avatar
    Lives in surrey, United Kingdom. Last Activity: 2 Weeks Ago Has been a member for 5-6 years. Has a total post count of 73. Received thanks 2 times, giving thanks to others 1 times.
    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.

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