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

    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
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    Sep 21, 2002
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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
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    Nov 15, 2009
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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.

    Glen
     

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