Riveted balance pivot

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  1. #1
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    Riveted balance pivot

    Hi out there,

    again a new story on my desaster pages. Have a look at this balance pivot



    and its little story: Ranfft Watches, Balance Troubles

    Mineral crystal and stone floor aren't always far enough apart, so keep your pocket watch
    always properly at the chain.

    Regards, Roland Ranfft

  2. #2
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    Re: Riveted balance pivot

    Very interesting. I bet the balance jewel was not enjoyable to remove intact, yet you seem to have as it is not in your accounting.

  3. #3
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    Re: Riveted balance pivot

    Hi Kris,

    I guess it depends on the strength of the cap jewel plate, and how the pivot is hardened,
    what happens.

    If the cap jewel plate is weak, the thick part of the staff simply punches a big hole
    into the hole jewel - nothing else happens, even the pivot remains intact. Sometimes
    the cap jewel breaks, but more likely because its plate is bent - not by the pivot.

    But this Longines has a pretty rugged cap jewel plate, and therefore the pivot had to
    take the whole energy of the shock. Nothing happened to the jewels.

    As I wanted this case for demonstration, I took the watch and my camera to the
    watchmaker expecting to discover the holy secret of watchmaking. He simply forced
    the balance out of the jewel and polished the pivot. And the question, what he'd do
    if the balance doesn't come off, he replied: The staff comes always off, either with
    pivot or without. And in the later case he would replace the staff - ready.

    Regards, Roland Ranfft

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  5. #4
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    Re: Riveted balance pivot

    I suppose that is the holy secret - applied force from an experienced hand is often the right thing to do.

    Still, braver hands than mine.

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