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Thread: Drill chuck disasembly

  1. #1
    Join Date
    Aug 2002
    Location
    Albuquerque
    Posts
    2,139

    Default Drill chuck disasembly

    Have a Jacobs clone (at least it dosent have a name on it) 1/2 " that the
    gear teeth are wrecked so was going to take it apart to see the innards.
    Can't find how it comes apart.
    Markings on it are as follows:
    A sort of fat delta (Mazada engine rotor) RJ3-16L
    That's all it says.
    Does the "barell seperate or does it press off and if so how to support it etc. ?
    Thanks for any ideas.
    ...lew...

  2. #2
    Join Date
    Apr 2001
    Location
    Clinton, WA
    Posts
    955

    Default

    Lew,
    Heres a site with some instructions,
    http://www.beautifuliron.com/jacobs.htm
    Mark Hockett

  3. #3
    Join Date
    Jan 2003
    Location
    Deep in the Heart of Texas!
    Posts
    5,651

    Default

    If it's a ball bearing chuck, watch for the bearing port during the press. If you're not careful, you'll be be chasing your balls around the shop floor.

  4. #4
    Join Date
    Apr 2006
    Location
    China, ME
    Posts
    546

    Default

    I hate it when that happens.
    Todd

  5. #5
    Join Date
    May 2006
    Location
    Phoenix, AZ
    Posts
    3,214

    Default

    Hehe, yeah, that was fun...

    But later chucks, at least the Jacob Super Chucks, have caged bearings rather than loose.

  6. #6
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    Jan 2003
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    I wouldn't know about that. My stuff is a little obsolete.


  7. #7
    Join Date
    Jan 2003
    Location
    Chilliwack, B.C.
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    Default

    So---how does a keyless chuck come apart? Press the sleeve off, same as ordinary chuck?

  8. #8
    Join Date
    May 2006
    Location
    Phoenix, AZ
    Posts
    3,214

    Default

    Nope, they have an outer shell that screws off the body.

  9. #9
    Join Date
    Apr 2001
    Location
    Clinton, WA
    Posts
    955

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    In my shop I have 12 Jacobs ball bearing chucks. Some of them were purchased used and the jaws are a little chewed up. I wanted to put new jaws in them so I called my industrial supplier and got a price. They only sell rebuild kits for the ball bearing chucks and the price was $115.00 for the 1/2" chucks. At that price I can buy two import ball bearing chucks. Enco's sale price on new Jacobsís ball bearing chucks is very close to that price. I don't think I will be purchasing any more Jacobs ball bearing chucks for my shop because of the cost to rebuild. I can put new jaws in my Albrecht chucks for $45.00 and it takes less than 10 minutes. Albrecht chucks are very simple to disassemble.

    I am not a big fan of the keyless chucks when being used on my CNC mills, the spindle has a brake that stops the spindle so fast the chucks can open up. I think my next chuck purchase will be an Albrecht key type chuck. They use a T-handle type Allen wrench to tighten and are rock solid and dead true when tight.
    Mark Hockett

  10. #10
    Join Date
    May 2006
    Posts
    8,607

    Default

    Quote Originally Posted by CCWKen
    I wouldn't know about that. My stuff is a little obsolete.



    WOW, that thing is in great shape, nice knurling too, for 1902 or any era for that matter.

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