Benrus crown unscrewing when setting

Thread: Benrus crown unscrewing when setting

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  1. #1
    Member hrossroth's Avatar
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    Benrus crown unscrewing when setting

    Hello- I bought an inexpensive 1940's Benrus with swiss movement. It seems when I try to set the time, the crown unscrews going clockwise. It will only set going counter clockwise. Is this how they are? Is this supposed to happen?

  2. #2
    Member Marrick's Avatar
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    Re: Benrus crown unscrewing when setting

    No. It means that the crown is loose. When you wind the crown clockwise the hands go counter (or anti) clockwise no problem because you're tightening it up. The other way, its just unscrewing off the stem. If it were mine, I'd remove the stem from the watch and grip it (ideally with a pin vice) and tighten the crown on more firmly. If it still unscrewed, I'd put a tiny drop of Loctite or other thread locking 'glue' on the top of the stem before screwing the crown back on. Or take it to a watchmaker.
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  3. #3
    Member Paleotime's Avatar
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    Re: Benrus crown unscrewing when setting

    I'd put a tiny drop of Loctite
    But be careful of the grade/color you use. The hardest setting stuff (red I think) will never come off without breaking something.

    No loctite? A little fingernail polish will work fine.

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  5. #4
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    Re: Benrus crown unscrewing when setting

    No, use the red and plenty of it! e

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    Re: Benrus crown unscrewing when setting

    Don't worry what ever toctite you use can be loosened by boiling water
    and and putting the stem/crown in for a bit. Use caution don't burn yourself.
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  7. #6
    Member hrossroth's Avatar
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    Re: Benrus crown unscrewing when setting

    Thanks for the replies. This would be my first foray into watch repair. Is it an easy fix to remove the stem and apply some loctite? Could I do it myself? What sort of tools would I need? Thanks. -Z

  8. #7
    Member Marrick's Avatar
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    Re: Benrus crown unscrewing when setting

    See

    http://www.google.co.uk/imgres?imgur...placewatchmove

    http://www.google.co.uk/imgres?imgur...u9B9GtOMeR9OED

    If the stem's held in by a screw (probable), you'll need a suitable watchmaker's screwdriver. You could grip the stem with small rat nosed pliers. Pretty straightforward unless you loosen the screw too much - bits fall off under the dial then.
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  9. #8
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    Re: Benrus crown unscrewing when setting

    Quote Originally Posted by dirtvictim View Post
    Don't worry what ever toctite you use can be loosened by boiling water
    and and putting the stem/crown in for a bit. Use caution don't burn yourself.
    True, for the common over the counter small bottles, but there are Loctite compunds that are designed for automotive uses that do not. Red should be ok read the instructions. I went and checked the data sheets any of the thread lockers have a working tempature of 300F the super glue 180F (82C)
    Last edited by nsmike; July 10th, 2010 at 00:25.

  10. #9
    Member Paleotime's Avatar
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    Re: Benrus crown unscrewing when setting

    there are Loctite compunds that are designed for automotive uses that do not
    This is where my experience with locktite comes from. You can use heat from a torch and it seems to make no difference.

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    Member lysanderxiii's Avatar
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    Re: Benrus crown unscrewing when setting

    Use Loctite 222. It's purple.
    Last edited by lysanderxiii; July 13th, 2010 at 18:53.
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