Thread: Adjusting the 7S26A caliber

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  1. #1
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    Adjusting the 7S26A caliber

    Hi all,

    I have a Seiko SKX009K which is running +8 minutes fast each month and would like to adjust it. Can anyone tell me how much to turn the regulator (to the 'slow' side) in order to obtain maximum accuracy . Watch is 2 yrs old.

    Thanks.

  2. #2
    Member cold_beer839's Avatar
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  3. #3
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    Re: Adjusting the 7S26A caliber

    Thanks, seems I must do it with trial and error for every two hours until we are there. Seems I must turn the regulator very little not to make it worse!

  4. #4
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    Re: Adjusting the 7S26A caliber

    Thanks for the links cold_beer.

    I just bought a tool kit to work on my Sumo. It's running a consistent -7 per day.

    If I could cut that in half I'd be happy.

  5. #5
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    Re: Adjusting the 7S26A caliber

    I received the case back wrench and started adjusting my Sumo (6R15) a couple of days ago.

    My experience this first time......when I moved the arm enough to see it with the naked eye I moved it WAY too much. My watch was -7 seconds per day originally. The first tweak resulted in a very fast watch that was out in the weeds.

    Small changes are what is needed. I ended up using a pair of 6" dial calipers so I could move the arm .002" at a time. I have it back pretty close, and I've been checking it over the last 24 hours, it's + or - about 3-4 seconds. If it needs another tweak I'll only go .001" at a time.

    Adjusting these Seiko movements is delicate. Eyeballing using a toothpick doesn't cut it.

  6. #6
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    Re: Adjusting the 7S26A caliber

    There's a software called "biburo" that could help with the timing. It's quite hard to use, but I plan to get it working and use it to adjust my 7s26s soon!

  7. #7
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    Re: Adjusting the 7S26A caliber

    anybody knows if this second hand (from ebay) would fit my skx009k please?

    Brand new automatic Seiko diver's 7002 set of hands | eBay

  8. #8
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    Re: Adjusting the 7S26A caliber

    Yes, they will. But at that price don't expect great lume.

  9. #9
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    Re: Adjusting the 7S26A caliber

    Quote Originally Posted by fundamentalman View Post
    Yes, they will. But at that price don't expect great lume.
    Thanks! Could you please suggest from where to buy with good lume and a blue chapter minute ring for skx009k?

  10. #10
    Member dnslater's Avatar
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    Re: Adjusting the 7S26A caliber

    Quote Originally Posted by jur24 View Post
    Thanks! Could you please suggest from where to buy with good lume and a blue chapter minute ring for skx009k?
    Home - DAGAZ WATCH LTD.

    Kind Regards,
    Nick
    __________________________________________________ _______________________________________________

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