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  1. #1
    Join Date
    Dec 2007
    Location
    Sydney
    Posts
    395

    Default C & J 4jaw chuck.

    I have dug out of my stash a C & J ( Crowe & Jorgensen) Made in Australia 4 jaw chuck.
    Its a 4 1/2” CO45#.
    I don’t remember where this came from, I have the chuck key.
    It was full of old grease/oil and the jaws where very hard to wind out.
    I don’t know if it’s ever been used, had no backing plate.
    Ive cleaned it up in thinners, oiled it and tried the jaws.
    They are still too hard to move.
    Looking at the back the screw retainers have an internal thread.
    Would I be correct in assuming this would be for removal of them so I can try the jaws for fit.
    H.
    Jimcracks for the rich and/or wealthy. (aka GKB '88)

  2. #2
    Join Date
    Jul 2016
    Location
    Melbourne
    Age
    35
    Posts
    1,522

    Default

    The style I'm used to has a forked plug that's inserted from the back of each jaw screw and fits a recess in the screw itself. But they are always retained from the back somehow. A picture might help me give a more coherent explanation.

  3. #3
    Join Date
    Jun 2011
    Location
    Australia east coast
    Age
    71
    Posts
    2,713

    Default

    Quote Originally Posted by caskwarrior View Post
    The style I'm used to has a forked plug that's inserted from the back of each jaw screw and fits a recess in the screw itself. But they are always retained from the back somehow. A picture might help me give a more coherent explanation.
    I've pulled some of my P-B 4 jaw chucks apart because the screws were cracked. The plugs were just a firm tap-fit in the holes, nothing but friction retaining them.

    PDW

  4. #4
    Join Date
    Dec 2007
    Location
    Sydney
    Posts
    395

    Default

    The thread was 1/4” whit so I used a socket and a few washers and they pulled clear ok.
    Bit of a tweek with a file and she’s good to reassemble.
    Guess it’ll be a matter of using a screwdriver or similar to line up the forked bits as a few of them rotated when the socket screw bottomed.
    H.
    Attached Images Attached Images
    Jimcracks for the rich and/or wealthy. (aka GKB '88)

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