Demagnetising

[baradona]

Hi

My 116520 Daytona appears to be magnetised - it runs a bit fast, and both moves the needle of a compass (though only a very few degrees), and comes up as magnetised on the Lepsi app.

Given current conditions, I'm not going to be able to get it to a watch shop, so I plan to buy a cheap generic demagnetiser from Amazon.

My question is this. In all of the videos I've watched the watch is demagnetised by placing the watch case-back to the demagnetiser and lifting it away. I don't have a springbar tool, and don't want to remove the bracelet because I am concerned that I will drop a springier and damage the watch case. Is there any reason not to demagnetise the watch dial side down?

Thanks

[padi56]

Originally Posted by baradona

Hi

My 116520 Daytona appears to be magnetised - it runs a bit fast, and both moves the needle of a compass (though only a very few degrees), and comes up as magnetised on the Lepsi app.

Given current conditions, I'm not going to be able to get it to a watch shop, so I plan to buy a cheap generic demagnetiser from Amazon.

My question is this. In all of the videos I've watched the watch is demagnetised by placing the watch case-back to the demagnetiser and lifting it away. I don't have a springbar tool, and don't want to remove the bracelet because I am concerned that I will drop a springier and damage the watch case. Is there any reason not to demagnetise the watch dial side down?

Thanks

Explain what you mean by a bit fast as its mainly the hairspring that causes most magnetise problems, and seeing that the Daytona uses a hairspring that cannot be magnetised.Now when any watch is magnetised in general they do speed up, but in general not by a few seconds.They could speed up by minutes or more and run very erratic or even stop and refuse to start. Dont forget your own body puts out a magnetic field so if your watch is only running a few seconds fast and running erratic would doubt if its magnetised.

[baradona]

Fair comment, and I’m aware of the blue Parachrom hairspring. I’m timing it accurately and will revert, but I think it’s as much as 30 seconds to a minute a day. It had a full Rolex overhaul only a few months ago too.

No question that it moves the needle of a compass though - perhaps that isn’t of concern.

[Tools]

Magnetizing is the alignment of the electrons, causing a uniform field of flux.

A de-magnitizer simply pushes a stronger magnetic field into this aligned flux and causes it to re-scramble. It doesn't matter where that is coming from, so long as it is sufficiently strong enough to do the job.

[Calatrava r]

Originally Posted by padi56

Explain what you mean by a bit fast as its mainly the hairspring that causes most magnetise problems, and seeing that the Daytona uses a hairspring that cannot be magnetised.Now when any watch is magnetised in general they do speed up, but in general not by a few seconds.They could speed up by minutes or more and run very erratic or even stop and refuse to start. Dont forget your own body puts out a magnetic field so if your watch is only running a few seconds fast and running erratic would doubt if its magnetised.

Is it true you can actually upset the fields of a watch if you de-magnetize it when it was not magnetized? I have heard this.

[SearChart]

Originally Posted by Calatrava r

Is it true you can actually upset the fields of a watch if you de-magnetize it when it was not magnetized? I have heard this.

Depends on the type of demagnetiser, but yes one can magnetise a watch with a demagnetiser.

[Jocke]

Originally Posted by SearChart

Depends on the type of demagnetiser, but yes one can magnetise a watch with a demagnetiser.

Correct, if you don't pull the watch off the demagnetizer or releases the button before you pull the watch off it will be magnetized.

[baradona]

Originally Posted by Tools

Magnetizing is the alignment of the electrons, causing a uniform field of flux.

A de-magnitizer simply pushes a stronger magnetic field into this aligned flux and causes it to re-scramble. It doesn't matter where that is coming from, so long as it is sufficiently strong enough to do the job.

That’s what I would have though, thank you.

[Ihatecheese]

I have one of these and was optimistically hoping a watch was magnetised as it suddenly was running a bit fast. Unfortunately it wasn't magnetised :( boo.

[Andad]

I would not bother.

Based on your description I don't see a problem due to magnetism.

In any event most of the cheap demagnetisers could do more harm than good in the wrong hands.

[Chester01]

Originally Posted by baradona

Fair comment, and I’m aware of the blue Parachrom hairspring. I’m timing it accurately and will revert, but I think it’s as much as 30 seconds to a minute a day. It had a full Rolex overhaul only a few months ago too.

No question that it moves the needle of a compass though - perhaps that isn’t of concern.

Yes it happens. Usually for me, running my arm too close to the magnetic strip in the refrigerator door while grabbing the milk. I bough a cheap demagnitizer for like 12 bucks and it gets my 16610 in working order. For what’s its worth, my 16610 runs +2/3 fast each day and closer to +8/10 when magnetized, so it’s not a massive difference as some here have mentioned. But If it was just serviced or recently, your AD can take a look. I had my 16610 serviced and then it started running fast, about 8 months later I brought it in. They looked at it and demagnetized it for me for free. Plus the hairspring on the Daytona should not be an issue, so couldn’t hurt to bring it back in.

[baradona]

So actually the watch isn't running very fast. It does move the compass though. I suppose I'd better live with that!

[Panych]

When demagnetizing, it does not matter how you put the watch on the demagnetizer, dial up or down.

[abrace]

Originally Posted by baradona

-It had a full Rolex overhaul only a few months ago too.-.

Should have a full 2 year warranty then, send it back as soon as the RSC opens back up and have them fix. 30 seconds a day is not within COSC specs, let alone Rolex superlative chronometer specs...

[MAINEZX10]

Sounds like you need to make a trip to RSC

[baradona]

It would definitely go to Rolex but for the virus. That is why it won’t!

[Rado63]

The 116520 would have the 4130 movement which supposedly had the parachrom hairspring since 2000. If that's the case, then the watch shouldn't be effected by magnetism. The 116520 has been around since 2000 so if the watch hasn't been serviced, maybe just time for a service.

[robmack]

Exactly. This ^^^