Can magnetism affect a Spring Drive?

Thread: Can magnetism affect a Spring Drive?

Results 1 to 3 of 3
  1. #1
    Member Covenant's Avatar
    Join Date
    Apr 2009
    Location
    Sydney, Australia
    Posts
    867

    Can magnetism affect a Spring Drive?

    While the crystal oscillator obviously should be immune to a magnetic field, can other parts of the Spring Drive movement (glide wheel, mainspring?) be adversely affected by magnetism?

    In a traditional quartz movement a strong magnet can stop the electric stepper motor temporarily while the watch is within the field, but the movement shouldn't be harmed or remain magnetised once the watch leaves the field. But does anyone know the effects a strong magnet has on Spring Drive?
    Art is how we decorate space. Music is how we decorate time.

  2. #2
    Member Covenant's Avatar
    Join Date
    Apr 2009
    Location
    Sydney, Australia
    Posts
    867

    Re: Can magnetism affect a Spring Drive?

    Disregard, found the answer here:
    https://deployant.com/ask-deployant-...-spring-drive/

    Seems it is only affected while within the magnetic field, like a traditional quartz.
    Overwound likes this.
    Art is how we decorate space. Music is how we decorate time.

  3. #3
    Member whineboy's Avatar
    Join Date
    Aug 2012
    Location
    New York City
    Posts
    1,530

    Re: Can magnetism affect a Spring Drive?

    Quote Originally Posted by Covenant View Post
    Disregard, found the answer here:
    https://deployant.com/ask-deployant-...-spring-drive/

    Seems it is only affected while within the magnetic field, like a traditional quartz.
    Tip of my hat for finding such an authoritative source, Mr. Kirk himself .

    I recall a few threads on this subject, this one is interesting in that it points out the glide wheel's magnets can be affected by a strong external magnetic field.

    https://forums.watchuseek.com/f642/s...m-4936029.html
    Covenant likes this.
    whineboy
    All mechanical, all the time

  4. #4
    Member Covenant's Avatar
    Join Date
    Apr 2009
    Location
    Sydney, Australia
    Posts
    867

    Re: Can magnetism affect a Spring Drive?

    Quote Originally Posted by whineboy View Post
    Tip of my hat for finding such an authoritative source, Mr. Kirk himself .

    I recall a few threads on this subject, this one is interesting in that it points out the glide wheel's magnets can be affected by a strong external magnetic field.

    https://forums.watchuseek.com/f642/s...m-4936029.html
    There seems to be a lot of contradictory information about this online. I assume that a lot are educated guesses and/or information from the user's manual. I'm choosing to believe Joe Kirk on this one, although it makes sense that a strong enough magnet could still compromise the glide wheel.
    whineboy likes this.
    Art is how we decorate space. Music is how we decorate time.

  5. #5
    Member
    Join Date
    May 2015
    Location
    Kissimmee, Florida
    Posts
    98

    Re: Can magnetism affect a Spring Drive?

    I recently was looking into this. It appears all their movements are anti-magnetic it appears. I was comparing a few watches for purchase. The Spring drive and 9S movements have the same anti-magnetic rating “unofficially.

    I am being lazy here but i will just copy and paste my post. Spron is way ahead of its time.

    It is anti-magnetic up to 4800G with a spron 610 mainspring and balance spring. Not as much as my Omega but not bad. Spring drive has a spron 610 mainspring but its anti-magnetic properties i am not sure of. The 4800 rating is directly from GS USA. It isn't official but was tested and 4800 was the rating tested for the 9S movement. This 4,800 A/M is the standard for any watch that bears the antimagnetic badge, it may be even more resistant than this but this is what was what was tested. Spron 610 is rated to over 10000 A/M. Why GS doesn’t advertise this i am not sure. Probably the same reason they have such wide range tolerances for accuracy when the actual watches perform much better than GS says they should.

    It is mostly the look that makes a good GADA watch, i feel the Spring Drive is a little on the dressy side for my taste. SBGR on the sporty side, but can do dress when needed.

    http://forums.timezone.com/index.php...89#msg_6898323

    Spron 510, not 610. 610 is superior.

    https://www.sii.co.jp/en/me/spron/support/spec/#spec2-4


    https://youtu.be/v0hR9jagpSM
    trott3r likes this.
    Current watches:

    Omega Seamaster Pro 2018
    Rolex Explorer 214270
    Heuer Autavia 2017

  6. #6
    Member BarracksSi's Avatar
    Join Date
    Feb 2013
    Location
    Washington, DC
    Posts
    12,662

    Re: Can magnetism affect a Spring Drive?

    Is it 4800 gauss, or 4800 Amperes-per-meter? Big difference there. 4800 A/m is a pretty old standard for magnetic resistance anyway, published in ISO 764, long before rare earth magnets became mainstream in electronics and other accessories (bracelets, handbags, etc).

  7. #7
    Member whineboy's Avatar
    Join Date
    Aug 2012
    Location
    New York City
    Posts
    1,530

    Re: Can magnetism affect a Spring Drive?

    Quote Originally Posted by Dudeman1973 View Post
    I recently was looking into this. It appears all their movements are anti-magnetic it appears. I was comparing a few watches for purchase. The Spring drive and 9S movements have the same anti-magnetic rating “unofficially.

    I am being lazy here but i will just copy and paste my post. Spron is way ahead of its time.

    It is anti-magnetic up to 4800G with a spron 610 mainspring and balance spring. Not as much as my Omega but not bad. Spring drive has a spron 610 mainspring but its anti-magnetic properties i am not sure of. The 4800 rating is directly from GS USA. It isn't official but was tested and 4800 was the rating tested for the 9S movement. This 4,800 A/M is the standard for any watch that bears the antimagnetic badge, it may be even more resistant than this but this is what was what was tested. Spron 610 is rated to over 10000 A/M. Why GS doesn’t advertise this i am not sure. Probably the same reason they have such wide range tolerances for accuracy when the actual watches perform much better than GS says they should.

    It is mostly the look that makes a good GADA watch, i feel the Spring Drive is a little on the dressy side for my taste. SBGR on the sporty side, but can do dress when needed.

    http://forums.timezone.com/index.php...89#msg_6898323

    Spron 510, not 610. 610 is superior.

    https://www.sii.co.jp/en/me/spron/support/spec/#spec2-4


    https://youtu.be/v0hR9jagpSM
    There is not a Spron hairspring in a Spring Drive and AFAIK mainspring magnetization is not an issue w/r/t SD timekeeping - the time regulating element is the tri-synchro regulator and that does not use a Spron spring. Nothing in these materials addresses the question asked.
    whineboy
    All mechanical, all the time

  8. #8
    Member Covenant's Avatar
    Join Date
    Apr 2009
    Location
    Sydney, Australia
    Posts
    867
    Quote Originally Posted by Dudeman1973 View Post
    I am being lazy here but i will just copy and paste my post. Spron is way ahead of its time.

    It is anti-magnetic up to 4800G with a spron 610 mainspring and balance spring. Not as much as my Omega but not bad. Spring drive has a spron 610 mainspring but its anti-magnetic properties i am not sure of. The 4800 rating is directly from GS USA. It isn't official but was tested and 4800 was the rating tested for the 9S movement. This 4,800 A/M is the standard for any watch that bears the antimagnetic badge, it may be even more resistant than this but this is what was what was tested. Spron 610 is rated to over 10000 A/M.
    There's a bit of misinformation here. As other commenters have noted, don't confuse A/m (amperes per metre) with Gauss. 1G = about 80 A/m. I've also read that Spron 610 is actually resistant to about 10,000 A/m, which would mean about 125 Gauss.

    Source: http://forums.timezone.com/index.php...89#msg_6898323

    To put that in perspective, a common soft fridge magnet is rated to about 50G, while a magnetic clasp used for a phone/tablet cover can be up to about 500G, and some handbag and messenger bag clasps use rare earth magnets of around 1000G. The magnetic fields from large floorstanding speakers can be even stronger.

    So while an Omega master chronometer is largely unaffected by anything magnetic outside an MRI machine, a 9S calibre Grand Seiko can be magnetised by getting it too close to a tablet cover.

    Btw, Spring Drive also uses a Spron 510 mainspring, while hi-beat uses Spron 530 for added torque.

    Sources:
    https://www.seikowatches.com/global-...rive-knowledge

    https://www.grand-seiko.com/au-en/ab...echanical/9s85

    My previous automatic was a Nomos Neomatik, which bore the standard ISO 4,800 a/m antimagnetic rating, yet in 6 months of ownership I managed to magnetise it four times. I work in IT and am exposed to magnetic fields from devices all the time, so my daily wearer can't be too precious around magnets. Thus why I'm considering spring drive as an alternative to my existing HAQ pieces.
    Art is how we decorate space. Music is how we decorate time.

  9. #9
    Member BarracksSi's Avatar
    Join Date
    Feb 2013
    Location
    Washington, DC
    Posts
    12,662

    Re: Can magnetism affect a Spring Drive?

    Quote Originally Posted by Covenant View Post
    My previous automatic was a Nomos Neomatik, which bore the standard ISO 4,800 a/m antimagnetic rating, yet in 6 months of ownership I managed to magnetise it four times. I work in IT and am exposed to magnetic fields from devices all the time, so my daily wearer can't be too precious around magnets. Thus why I'm considering spring drive as an alternative to my existing HAQ pieces.
    [tangent]
    I've liked looking at Nomos, too, but I'm also in IT. So far, though, the magnets I'm around are in laptops, and I don't think they've affected my watches (namely an ETA and a 7S26). Still, the multiple reports from Nomos owners give me pause. And the fact that I have other gadgets around -- my iPad is my morning news reader, for example -- means I'm always a little careful with my watches. I'd like to not worry at all, though.

  10. #10
    Member Covenant's Avatar
    Join Date
    Apr 2009
    Location
    Sydney, Australia
    Posts
    867

    Re: Can magnetism affect a Spring Drive?

    Quote Originally Posted by BarracksSi View Post
    [tangent]
    I've liked looking at Nomos, too, but I'm also in IT. So far, though, the magnets I'm around are in laptops, and I don't think they've affected my watches (namely an ETA and a 7S26). Still, the multiple reports from Nomos owners give me pause. And the fact that I have other gadgets around -- my iPad is my morning news reader, for example -- means I'm always a little careful with my watches. I'd like to not worry at all, though.
    Nomos make beautiful watches, to be sure. But their slimness - while attractive - also seems to result in easier magnetization.

    I don't want to have to be careful with my watches, or worry about them. I'm of the mindset that I wear the watch, the watch doesn't wear me. My HAQ Credors serve pretty well in that regard, but I must admit, quartz lacks both a literal and figurative heft on the wrist when compared to mechanical. The feel/sound of a rotor moving and the sweeping seconds hand are both greatly missed from my departed Nomos. I'm on a research campaign atm to find a new GADA that gives me the joy of ownership of a mechanical without the worries or hassles.
    Last edited by Covenant; 1 Day Ago at 04:24.
    Art is how we decorate space. Music is how we decorate time.

Thread Information

Users Browsing this Thread

There are currently 3 users browsing this thread. (1 members and 2 guests)

  1. Premise

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •