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  1. #1
    Join Date
    Apr 2009
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    Default Anyone recognise this adjustable Chuck

    Hi All,
    I brought this adjustable chuck along with the Zeatz Dividing head and the Meca rotary table a little while ago. I checked the chucks run out at the time and it had .004". I could not move any of the adjusting screws they were done up super tight,so I put it aside. I have just pulled it apart, had to use a big hammer drill to undo the three adjusting screws. It is a well built chuck but has seen some abuse as you can. After a good clean and oil I studied it to work out how the adjusting mechanism worked and put it back together. I set it up on my mill table and chucked up a ground 12mm piece of bar and had it holding .01mm run out in a couple of minutes. The chuck has no brand on it anywhere, can anyone recognise it from the pictures and the adjusting mechanism.
    Bob
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  3. #2
    Ueee's Avatar
    Ueee is offline Blacksmith, Cabinetmaker, Machinist, Messmaker
    Join Date
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    Default

    Hi Bob,
    It's the same as my Pratt burnerd that I posted about in that same thread. Was the back of the chuck dowelled like mine?

    Ew
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

  4. #3
    Join Date
    Apr 2012
    Location
    Melbourne
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    Default

    Looks like a Pratt Burnerd.
    The older ones had a little disc with the brand in the counterbore on the face of the chuck.
    http://www.600uk.com/products/machine.asp?id=150

  5. #4
    Join Date
    Apr 2009
    Location
    Ballina N.S.W.
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    Default

    Thanks to Ueee and Clubman 7 for your reply's and identifying my chuck. Ueee mine does not have dowels in it. When I finally got it apart I thought it looked like your one but I could not find your original post to check it.Clubman 7. My chuck has the recess in the chuck face where the brand name would have been, but it is long gone. I do not think it is a good idea placing name badges in chuck faces, I had one come adrift in my 6" chuck hit the roof with quite a bang. Glue and oil not a good combination.
    Bob

  6. #5
    Join Date
    Jul 2012
    Location
    Malvern East
    Posts
    40

    Default Its a Grip True

    Yep not only is a Pratt Benard its also the top of the range grip true model the three dial in wedge screws enable the chuck to be dialled in congrats its the king of chucks

    Bruce

  7. #6
    Join Date
    Apr 2009
    Location
    Ballina N.S.W.
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    Default

    Bruce,
    Thanks for your reply, it is a well made chuck everything fits nice and snug. It has been beat up a bit on the outside.
    Bob

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