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Technical Anyone know what tapped thread Chrysler screw in balljoints are?

Discussion in 'The Hokey Ass Message Board' started by 31Vicky with a hemi, Sep 17, 2018.

  1. How long have you had these threads (since 1958)
    What's the papers on thread size
    (You don't need that )
    These are not threads you are looking for


    IMG_1491.PNG IMG_1492.PNG
     
  2. Simple question ? Not only has it likely been answered, but if you're not able deal with litany of "Fly shit and pepper" perhaps reconsider posing such "simple" questions to HAMB or any other public forums.

    Besides, you're the one with "male and female parts in (your) hands". How hard is it to measure them ?
    Or do you really expect me or some one else telepathically to figure out which exact parts you have, go out and obtain same parts, so I/we can measure them for you ?

    Of course you could just go directly to any one of those "about Twenty different vendors" and ask them what equipment/method/tooling they use or what the thread sizes are, but that might get too complicated also.
     
    HemiDeuce and gimpyshotrods like this.
  3. So, apparently we're not even working on a vintage Chrysler or anything HAMB appropriate.
    I apologize for having wasted both of our time.
     
    Last edited: Sep 18, 2018
    gimpyshotrods likes this.
  4. Fordors
    Joined: Sep 22, 2016
    Posts: 1,745

    Fordors
    Member

    You can call it anything you want but until you can measure and quote the major pitch diameter and determine the TPI no one can help you. The K772 diameter across the threads is 1.837 and the K727 is 2.012, the chart at qa1 does not quote threads per inch for any ball joints. There is a 2"-16 American Standard Extra Fine thread that has a major diameter of 1.959, but again, that does not correspond to any thread dimension found on those ball joints.
    Yes, Victory Performance and Left Hander have taps but I still don't think they are of any standard thread size.
     
    Last edited: Sep 18, 2018
  5. blowby
    Joined: Dec 27, 2012
    Posts: 5,727

    blowby
    Member
    from Nicasio Ca

  6. oldolds
    Joined: Oct 18, 2010
    Posts: 2,672

    oldolds
    Member

    31Vicky. Is this still to do with the tubular a-arms you are making?
     
  7. The boss called again,,,,
    WTF are you guys doing because all he asked was how big the table tops were.
    image.jpeg
     
    VANDENPLAS likes this.
  8. Beanscoot
    Joined: May 14, 2008
    Posts: 873

    Beanscoot
    Member

    The text from Blowby's link:

    February 23, 2016 • Rev B • ©2016 Niwot Corp. dba Specialty Products

    Installing Screw-In Style Ball Joints

    Q1: What is the proper way to remove and install the Chrysler screw-in type ball joint?

    A1:
    The Chrysler "screw-in" ball joint was used mostly as a front upper control arm ball joint from 1962- 1989. Chrysler also used a larger screw-in ball joint for the lower control arm from 1957-1962. From the factory they were pressed into stamped steel control arms. The threads around the ball joint are not normal screw type threads, they are very shallow. The shallow threads made removal of the balljoints from the OE stamped arms possible without the use of a press. Replacement ball joints could be installed with a special socket instead of needing to be pressed in.


    Because there is not a standard for the "thread" that was used, there are often dimensional differences between how various ball joint manufactures turn the threads. This becomes very important with our adjustable upper control arm. Because our ball joint plate has a thick sleeve that retains the ball joint, it does not give like a stamped arm, and so some thread profiles may not easily be screwed in. In this case, it may be necessary to press the ball joint into place and then check torque.

    For those wanting to screw the balljoints into an arm, special sockets are needed. The 68880 has a 1-29/64" opening and is used for all the upper ball joints. The 68890 has a 2-9/64" opening and used for lower ball joints.

    Parts Referenced: 94002, 94008, 94450, 94451, 94460, 94461
     
  9. There is some kind of thread on the chaser,
    And that thread has some spec written down a drawing,
    It's a special tool designed to do a specific job, CHASE THREADS.

    I fully understand that the info is not fundamental common knowledge, maybe there's only 3 people alive who know what that thread is or ever seen the drawings and that's ok.
     
  10. squirrel
    Joined: Sep 23, 2004
    Posts: 42,001

    squirrel
    Member

    yup, it's hard to tell someone what thread size it is, when it isn't a thread size.

    If you have the parts in your hand, you can make a thread chaser, without seeing the elusive drawing.
     
    TTR likes this.
  11. Never had one go in and not tighten up. Never had a case where one came loose in service that I was made aware of. I guess it's hard to know 100 % for certain but it's not been a problem.

    Chrysler service manual says to replace ball joints by screwing old out and the new one in and torquing to 125 or 150 ft. lbs. depending on which car model it is.
     
  12. DDDenny
    Joined: Feb 6, 2015
    Posts: 11,359

    DDDenny
    Member
    from oregon

    Just say'n!

    20180918_093434.jpg
     
    indestructableforce and K13 like this.
  13. burl
    Joined: Nov 28, 2007
    Posts: 544

    burl
    Member
    from Minnesota

    dddenny beat me to it threads.jpg
     
    VANDENPLAS likes this.
  14. One last time: the threads on original (vintage) Chrysler b-js and these "modern" components OP is dealing with were more than likely NOT done with any tap, die or thread chaser.
    They were probably produced with a CNC (Lathe or Mill) with custom pitch drive set-up. Simple enough ?
     
    gimpyshotrods likes this.
  15. I get it you don't know, got it the first time. I get it it you can't answer the question, got that the first time too.
    Simple :

    Simpler - some little CNC programmer back in 1958 built something to roll threads.
     
    VANDENPLAS likes this.
  16. squirrel
    Joined: Sep 23, 2004
    Posts: 42,001

    squirrel
    Member

  17. classiccarjack
    Joined: Jun 30, 2009
    Posts: 1,344

    classiccarjack
    Member

    Nice!!! Thanks for the tip.

    Sent from my Moto Z (2) using The H.A.M.B. mobile app
     
    31Vicky with a hemi likes this.
  18. Fordors
    Joined: Sep 22, 2016
    Posts: 1,745

    Fordors
    Member

    I think the question has been answered. There is information for every standard thread used in industry, if you can measure what you have and show us that particular diameter and thread per inch count on a published chart then I will gladly admit my error.
    Until then I will continue to believe it is a bastard size used as a means to an end.
     
  19. The question -
    Does anyone know what tapped thread Chrysler screw in balljoints are?

    The answer-
    "Bastard size"

    Just pick any fucking "bastard size" you want out of your pocket and it will be "bastard size" because that's what you picked and it must therefore be correct.


    The alternate questions -
    Why do you need to know
    Why not just swap the arm
    What are you trying to do
    What's it going in
    Who's it for
    What color will it look best
    Why not measure it
    Why not press them in


    Some of you guys are smarter, wiser, and older than me and soooooo far none of you know (except maybe beaner who's forgot more than I know) Neither do I know what the thread is bastard or not and now I don't feel so bad.
     
  20. Could be an unusual thread degree, too. Just going to throw that out there to muddy the water and be less than helpful.
     
    31Vicky with a hemi likes this.
  21. Sorry. Unlike some others, I forgot a small detail in my original reply and didn't realize some one would scrutinize and take it so (too?) literally. Well, fixed it.

    Man, chasing threads like this (pun intended) could cause a person some brain-damage or at least headaches. I need to quit before I get any (more).
     
  22. squirrel
    Joined: Sep 23, 2004
    Posts: 42,001

    squirrel
    Member

    well yeah, it's not a normal thread. We all know that.

    this is an upper for an old A body


    1.642 major diameter
    1.622 minor diameter
    12 TPI

    Have fun!
     
  23. porknbeaner
    Joined: Sep 12, 2003
    Posts: 40,906

    porknbeaner
    Member

  24. classiccarjack
    Joined: Jun 30, 2009
    Posts: 1,344

    classiccarjack
    Member

    Kinda like the young kids at the parts store, they just don't know anything about our beloved cars.

    Sent from my Moto Z (2) using The H.A.M.B. mobile app
     
  25. classiccarjack
    Joined: Jun 30, 2009
    Posts: 1,344

    classiccarjack
    Member

    Yes, I use a torque wrench to install them... Done many and them some. I never use the press unless it's for the later stuff...

    Sent from my Moto Z (2) using The H.A.M.B. mobile app
     

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