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Thread: Marquette dinosaur

  1. #1
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    Marquette dinosaur

    Have an old Marquette tig machine. Thing makes beautiful welds, but it broke down. The little brass nut inside the machine that makes the transformer core move in or out as you crank, stripped out. Can't find part number or dealer.
    This machine might as well been made by Miller though cuz most of the parts say Miller. Wondering if any of you guys have an old Miller with a crank for the amperage control? If so what's the model number on your machine? I use this thing all the time, and would love to get it fixed soon. Thanks
    Hickory

  2. #2
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    Re: Marquette dinosaur

    Photo
    Bubble gum
    Tooth pix
    Duct tape
    Black glue
    GBMF hammer
    Screw gun --bad battery (see above)

  3. #3
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    Re: Marquette dinosaur

    Quote Originally Posted by Burpee View Post
    Photo
    Are you asking for a picture? If so it's all tore apart
    Hickory

  4. #4
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    Re: Marquette dinosaur

    Please provide a photo of the part and model number of the machine. It's possible that someone like me may be willing to just machine you a new brass nut if I happened to know what the part looks like and how complex it is

    --Wintermute
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  5. #5
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    Re: Marquette dinosaur

    Name:  IMG_20140311_162015.jpg
Views: 330
Size:  69.2 KB
    Hickory

  6. #6
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    Re: Marquette dinosaur

    If you could give dimensions and thread pitch I could machine that for you or someone near you could
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  7. #7
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    Re: Marquette dinosaur

    Wow took me forever to figure out how to do that. Smart phones are smarter than me
    Hickory

  8. #8
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    Re: Marquette dinosaur

    Did the threads strip or the outer grooves that hold it in place?
    Dave J.

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  9. #9
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    Re: Marquette dinosaur

    The threaded rod is 7/16" diameter with acme threads. The hex size is 3/4" across,
    1/16" thick. Overall hight is 1/2". Round part is 5/8" diameter with knurled lines. 12tpi
    Hickory

  10. #10
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    Re: Marquette dinosaur

    The threads stripped out.
    Hickory

  11. #11
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    Re: Marquette dinosaur

    You should also post a pic of where it goes as well - In case a different style of keeper needs to be made.
    I'm assuming it was originally pressed in?
    Dave J.

    Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~

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  12. #12
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    Re: Marquette dinosaur

    Unfortunately I have the knowledge to machine this part, just don't have the machines.
    Hickory

  13. #13
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    Re: Marquette dinosaur

    Yes, it was pressed into a plastic piece. But I could make a regular nut work as long as it had the right threads and was 3/4 hex. The hex keeps it from spinning in place not the knurling.
    I sure appreciate the help guys.
    Hickory

  14. #14
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    Re: Marquette dinosaur

    This nut is completely captured when in place. Doesn't really need to be knurled.
    Hickory

  15. #15
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    Re: Marquette dinosaur

    I used to work in a machine shop,I know what it's gonna take to build this. Shoot me a price
    Hickory

  16. #16
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    Re: Marquette dinosaur

    Quote Originally Posted by jontheturboguy View Post
    If you could give dimensions and thread pitch I could machine that for you or someone near you could
    You might need to get in touch with forhire, I think he is in your area, or nearby anyway. I bet he has the equipment to get one made.

  17. #17
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    Re: Marquette dinosaur

    McMaster-Carr. $5.12.

    http://www.mcmaster.com/#general-pur...e-nuts/=r1zq8u

    Machine to dimension.
    Last edited by duaneb55; 03-12-2014 at 12:08 AM.
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  18. #18
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    Re: Marquette dinosaur

    7/16 X 12 ACME nut is an odd ball size but easily done on a lathe.

  19. #19
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    Re: Marquette dinosaur

    http://www.victornet.com/cgi-bin/vic...:618,1170,1171

    These guys offer a 7/16-12 tap, but not acme. All my data sheets here dont list a 7/16-12 acme..
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  20. #20
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    Re: Marquette dinosaur

    I wouldn't be surprised if it's the 3/8-12 listed in the McMaster catalog.


    . . . but if not . . .
    http://www.mscdirect.com/browse/tn/T...032+4288104908
    Last edited by duaneb55; 03-12-2014 at 12:50 AM.
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  21. #21
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    Re: Marquette dinosaur

    It's an odd one for sure. I'm thinkin I should change the shaft to something more common. Lookin like that's the fix. Unless someone has an old Miller with a amp "crank", all I need is a model number can find part number from there.
    Dollars to pesos it's the same one. might as well paint this thing blue, everything in it says Miller.
    Hickory

  22. #22
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    Re: Marquette dinosaur

    Quote Originally Posted by Hickory View Post
    Dollars to pesos it's the same one. might as well paint this thing blue, everything in it says Miller.
    Rustoleum Sail Blue is pretty close to the current Miller blue if that helps any.

  23. #23
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    Re: Marquette dinosaur

    If it is a Marquette it is not a Miller pic please ,a nut can be had and adapted.

  24. #24
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    Re: Marquette dinosaur

    It is a Marquette, I would like to fix it right, but tomorrow I'm using a piece of all thread and a regular old nut gotta have this thing going.
    Hickory

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