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. #2
    Jonathan's Avatar
    Lives in Leicester (Home) or Nottingham University (2nd Home), United Kingdom. Last Activity: 7 Hours Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 3-4 years. Has a total post count of 3,216. Received thanks 258 times, giving thanks to others 8 times.
    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: 1 Day 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: 1 Day 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. #5
    Jonathan's Avatar
    Lives in Leicester (Home) or Nottingham University (2nd Home), United Kingdom. Last Activity: 7 Hours Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 3-4 years. Has a total post count of 3,216. Received thanks 258 times, giving thanks to others 8 times.
    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: 1 Week 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: 1 Week 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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