Demagnetize a watch

Seiko, Orient, Citizen, Casio and other Japanese watch companies
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balzebub71
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Demagnetize a watch

Post by balzebub71 » 02 Feb 2015 21:42

So my sumo suddenly went from running a few seconds slow a day to +20s fast a day. Still within the movement's spec but I suspected it got magnetised so I held it against a compass...
https://db.tt/d1EQKKA8" onclick="window.open(this.href);return false;
If u can see the video I took, it drives the compass crazy.

A cheap Demagnetizer I bought sometime ago off ebay didn't work.

As it is running within the movement's -15/+25s per day specs, not sure if Seiko will do anything about it?

Where else can I go to have it checked out on a rate machine and demagnetized at the same time?
I want to be a one watch guy!!
xzqt

Re: Demagnetize a watch

Post by xzqt » 02 Feb 2015 22:15

Did you remove the case back to demagnetize ?
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balzebub71
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Re: Demagnetize a watch

Post by balzebub71 » 02 Feb 2015 22:31

xzqt wrote:Did you remove the case back to demagnetize ?
No, u mean I need to?


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yrh0413

Re: Demagnetize a watch

Post by yrh0413 » 04 Feb 2015 16:53

my Spork got demagnetized and I recently bought a cheap $20 demagnetizer from eBay... works well now the watch runs well.

Maybe your demagnetizer failed?
xzqt

Re: Demagnetize a watch

Post by xzqt » 04 Feb 2015 17:51

Usually i remove back case.
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balzebub71
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Re: Demagnetize a watch

Post by balzebub71 » 04 Feb 2015 19:24

Hmm I tried it again, this time moving the watch through the flux field multiple times and it worked. Heh user error....
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Cosmograph
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Re: Demagnetize a watch

Post by Cosmograph » 05 Feb 2015 09:14

Should not need to remove the case back(If you are doing it the usual(normal) way and 10-15seconds should be sufficient from the front. If really need be I suppose you can get it timed to check.
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baitiansi

Re: Demagnetize a watch

Post by baitiansi » 10 Feb 2015 21:07

Very informative post, wasn't aware watches that ran fast are magnetized :)
Raddave

Re: Demagnetize a watch

Post by Raddave » 14 Feb 2015 16:37

baitiansi wrote:Very informative post, wasn't aware watches that ran fast are magnetized :)


Not all watches that run fast are magnatized.
But watches that are magnatized run fast.

When the hairspring gets magnatized, the coils have a tendency to stick together, thereby reducing the amplitude, and increasing the frequency of the balance wheel.
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balzebub71
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Re: Demagnetize a watch

Post by balzebub71 » 14 Feb 2015 18:18

After having 3 of my watches magnetized I have come to realise that magnetic field protection is more important in day to day life for watches than too much water resistance?
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Re: Demagnetize a watch

Post by roo7 » 14 Feb 2015 19:03

Don't leave your watches near magnetic sources.

Irks me when people post watches on handphones or near speakers.


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lunarin79
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Re: Demagnetize a watch

Post by lunarin79 » 14 Feb 2015 19:34

Raddave wrote:
baitiansi wrote:Very informative post, wasn't aware watches that ran fast are magnetized :)


Not all watches that run fast are magnatized.
But watches that are magnatized run fast.

When the hairspring gets magnatized, the coils have a tendency to stick together, thereby reducing the amplitude, and increasing the frequency of the balance wheel.
thanks for sharing, very infomative.
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KKG
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Re: Demagnetize a watch

Post by KKG » 14 Feb 2015 19:47

What about auto watches that run slow? What could be the problem/s?

Thank u.
Raddave

Re: Demagnetize a watch

Post by Raddave » 15 Feb 2015 08:08

It could just be that it needs regulation, or it might need a sevicing, due to dried up oils or dirt in the gear train


Among other things, what can cause a watch to run slow is worn balance staff, worn main spring, rust on the hair spring, and curb pins touching the hairspring
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balzebub71
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Re: Demagnetize a watch

Post by balzebub71 » 15 Feb 2015 11:46

Raddave wrote:It could just be that it needs regulation, or it might need a sevicing, due to dried up oils or dirt in the gear train


Among other things, what can cause a watch to run slow is worn balance staff, worn main spring, rust on the hair spring, and curb pins touching the hairspring
Sounds serious...but when running slow it would have to be slow outside of the manufacturer stated specs for the movement right?


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Raddave

Re: Demagnetize a watch

Post by Raddave » 15 Feb 2015 16:23

You are correct.

He never stated how slow it was running, I went from one extreme to the other.

It could very possibly be that it just needs a regulation.
demogoblin
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Re: Demagnetize a watch

Post by demogoblin » 15 Feb 2015 20:55

Watch that run slow is over demagnetize :p
eenick

Re: Demagnetize a watch

Post by eenick » 09 Mar 2015 22:59

Speakers are evil!
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