how to sync non hacking autos?

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  1. #1
    Member gatsuk's Avatar
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    how to sync non hacking autos?

    I was just wondering because i tried to sync all my watches with an atomic clock and i couldn't figure out how to do it on my non hacking automatics. i thought about turning it counter clockwise to stop the sweeping second hand but i'm scared it might damage the movement. please, help me shed some light on this. i'm trying to figure out how accurate my watches are. never really bothered me before but i was bored.

    Thank you!

  2. #2
    Member lysanderxiii's Avatar
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    Re: how to sync non hacking autos?

    You don't.

    However, sometimes you can sometimes stall a watch movement by applying back pressure on the crown.
    familiaritas parit contemptum; raritate admiratione wins.- Lucius Apuleius
    est necessry, accurate ad secundo? - Lysander magna
    iustum est horologium - Obscurus Genius

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    Member Coffeeshopman's Avatar
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    Re: how to sync non hacking autos?

    You do a reverse sync. When the real time hits :00 note where the second hand is on your watch.


    I sync the minute hand and ignore the second hand for the most part.

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  5. #4
    Member gatsuk's Avatar
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    Re: how to sync non hacking autos?

    Quote Originally Posted by lysanderxiii View Post
    You don't.

    However, sometimes you can sometimes stall a watch movement by applying back pressure on the crown.
    isn't that going to damage the movement? i tried that with an affordable and it's now synced. i'll observe it for a couple of days ,if it's fine i'll do it with the others.

    Quote Originally Posted by Coffeeshopman View Post
    You do a reverse sync. When the real time hits :00 note where the second hand is on your watch.


    I sync the minute hand and ignore the second hand for the most part.
    i'll try that one too. although, it would also be nice to open your watch box and look at your watches all running ''literally'' at the same time.

  6. #5
    lvt
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    Re: how to sync non hacking autos?

    Quote Originally Posted by gatsuk View Post
    I'm trying to figure out how accurate my watches are

    I usually use a cheap Casio with chronograph to check my watches's accuracy, no need to bother with atomic / nuclear
    Ball - Casio (G-shock) - HMT - Longines - Parnis - Seagull - Steinhart - Tissot - Victorinox - Yema

  7. #6
    Member zekio's Avatar
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    Re: how to sync non hacking autos?

    Quote Originally Posted by gatsuk View Post
    isn't that going to damage the movement? i tried that with an affordable and it's now synced. i'll observe it for a couple of days ,if it's fine i'll do it with the others.
    from what ive gathered, no. i had the same quatsion regarding the Speedmaster Pro, and many people here have
    stated that no harm is done in hacking the seconds hand like that.

    tho i have observed something weird on my Speedy, that might indicate an effect on the movement by stopping the
    second hand by a slight counterclockwise pressure on the crown. it changed accuracy after i set the time like this.

    ill explain:

    - Watch was like +15 sec a day, i sync the time (including second hand hacking).
    next, the watch would be like +10 a week. consistant for the next month till i set the time again.

    - i sync the time. again it has changed accuracy, running like +6 sec a day for the nextmonth.

    its been like that every time i set the time.

    last time i synced the time i didnt hack the seconds, just set the minute hand. and since then it hasnt changed accuracy

    so much for my anecdotal observation about manual hacking.

  8. #7
    Member lysanderxiii's Avatar
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    Re: how to sync non hacking autos?

    Quote Originally Posted by gatsuk View Post
    isn't that going to damage the movement?
    If all you do is stop the movement, no it would hurt anything, but, if the second hand starts to move backward, you maybe hurting the movement.
    familiaritas parit contemptum; raritate admiratione wins.- Lucius Apuleius
    est necessry, accurate ad secundo? - Lysander magna
    iustum est horologium - Obscurus Genius

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    Re: how to sync non hacking autos?

    Quote Originally Posted by lysanderxiii View Post
    If all you do is stop the movement, no it would hurt anything, but, if the second hand starts to move backward, you maybe hurting the movement.
    That's quite hard to get right, right? An absolutely tiny amount of too much backward pressure will turn the escapement wheel backwards, and possibly place a tooth in the way of a pallet jewel as the still moving balance presses it down. Properly oiled it should just slip out of the way, but there's a tiny chance that it will stay put and take the blow. I think the safest way to do this is to _very_ slowly increase the backward pressure and keep it as soon as the second hand stops. That way one could simulate the mainspring not having enough power to keep the balance running. Would take an awful lot of time to get it to this point.

    I still keep doing this every once in a while, but I also keep debating whether I should or not. It is not very likely that the movement will be damaged, but it is possible. On the other hand, this is also what happens when you're setting your time backwards, and the manufacturers obviously have no problem with this, so who knows.

  10. #9
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    Re: how to sync non hacking autos?

    The slight reverse pressure on the crown works for me. I can stop the movement or get it to run backwards. I've been doing this for years and haven't noticed any problems, nor have I read of any problems by doing this.

    However, if you're concerned about doing this, just set your watch to the nearest 30 seconds. If you know your watch runs slow, set it ahead a bit. If it runs fast, set it behind the current time.

  11. #10
    Moderator Public Forum John MS's Avatar
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    Re: how to sync non hacking autos?

    Quote Originally Posted by gatsuk View Post
    I was just wondering because i tried to sync all my watches with an atomic clock and i couldn't figure out how to do it on my non hacking automatics. i thought about turning it counter clockwise to stop the sweeping second hand but i'm scared it might damage the movement. please, help me shed some light on this. i'm trying to figure out how accurate my watches are. never really bothered me before but i was bored.

    Thank you!
    Just sync the minute hand - it will be more than sufficient for a mechanical movement.

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