Watches and Temperature

Discussion in 'Horological Misc' started by Mike Stonner, Feb 15, 2019.

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  1. Mike Stonner

    Mike Stonner Registered User
    NAWCC Member

    Dec 2, 2018
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    Hi, I have a question. Mechanical watches in their instruction manuals typically state that a watch can be used from X degrees low temp to X degree high temp. Why? Especially since explorers in the arctic and on the moon obviously disregard it. Thank you.
  2. Jim Haney

    Jim Haney Registered User
    NAWCC Member

    Sep 21, 2002
    Working the farm, Garden,horses, goats, chickens,
    Decatur, TN.
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    They will work however, the extreme temperatures will effect the balance wheel and weights and Oil & springs, etc. so their accuracy is effected.

    That's all, no big mystery:)
    RL likes this.
  3. glenhead

    glenhead Registered User
    NAWCC Member

    Nov 15, 2009
    Telecom Engineer
    Williamson County, Texas
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    Yup. Dimensions change and oils get thick. Exotic alloys are more dimensionally stable, but expensive. If you've ever tried to start a gasoline engine in 40-below temperatures (or colder) you know the oil gets reeeeeeeeeally thick. There are specialty watch oils now (e.g., Moebius 9030, 9040, and 9045) that are formulated to maintain lubrication below -40. It's uncommon to use them unless they're needed. They spread like crazy at room temperature (so epilame everywhere is sort of a must-have) and they tend to be ~10% more expensive.


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