balance wheel freezes

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  • #49941
    jdp020351
    Participant
    • Topics Started: 12
    • Total Posts: 42

    Good evening group;

    I recently purchase a 18s ASP pocket watch, gold filled. it ran great for a few weeks and has stopped running. i have not taken the watch apart yet to see what it might be. however when i removed the back i noticed that the balance wheel has great amplitude. The hair spring is in great condition. it appears to go faster and suddenly freezes (stops) dead. it does not slow down than stops but suddenly freezes. when touched, it will run than freeze. any thing that i might look for when i break it down?

    thanking all in advance
    Jerry

    #64457
    dlgraley
    Participant
    • Topics Started: 5
    • Total Posts: 14

    Any possibility it’s intermittently making contact with the cock/bridge?

    #64458
    jdp020351
    Participant
    • Topics Started: 12
    • Total Posts: 42

    Thank You, I will check for that
    Jerry

    #64459
    randy
    Participant
    • Topics Started: 39
    • Total Posts: 594

    Hey Jerry
    Dlgraley is spot on.

    Just to add to his suggestion, see if it stops in only one position, Dial up or down, left or right, etc.
    Dial up and I you would prove out his assessment that it’s possibly riding on the balance cock.
    Dial down…maybe a cracked balance jewel.
    Any position and I would have to think that maybe it’s a bad wheel tooth that hangs it up..or possibly the banking pins are missing, or need to be closed in a bit.

    Lot’s of different possibilities

    Let us know if we can help in any way…

    #64460
    jdp020351
    Participant
    • Topics Started: 12
    • Total Posts: 42

    Hi Randy
    I was thinking, could it be over banking? the balance wheel locks up and I have to use my peg wood to release it.
    it does lock up in one position. (stem up and face tilted at 45 degrees) Broken jewel?
    I’m stripping it down today and inspecting it.
    I will let you know what I find.
    Thanks to every one for their help
    Jerry

    #64461
    randy
    Participant
    • Topics Started: 39
    • Total Posts: 594

    It could be either of those issues Jerry..or even another one you will run across !
    Before you strip it down, just remove the movement.
    Then while it’s running,..try your best to observe the balance as it runs in the various positions using a 4X or stronger loupe.
    Look for the hairspring to rub on the balance wheel or against the cock.

    You could have both issues going on at once..just try to isolate them one at a time

    Best

    Randy

    #64462
    jdp020351
    Participant
    • Topics Started: 12
    • Total Posts: 42

    will do Randy
    Thank You
    Jerry

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jdp020351balance wheel freezes