New 2020 DJ 3235 magnetized

[Dirt]

Originally Posted by seabreeze60

Rolex news releases have nothing but wonderful reports on this movement.


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Naturally

[TswaneNguni]

Well,anti magnetic materials are of little importance if the bearing is under-lubed and the second hand pinion wears out ....

31xx I wear and forget .
32xx I keep an eye on the timing while under warrantee ...

[DJ2020]

I realize many people have had issues with there 3235. My DJ2 2017 ran for 3 years before I sold it and had no issues. Started at -2 SPD, and 3 years later it was still -2 SPD.

In a interesting conversation with my watch technician, He has been doing a little study on the 3235 and 3255 regulations. All his testing equipment is from rolex. He has a simulation machine that turns watches at different positions and records deviation over several days in different positions to simulate daily wear. He has noted that watches with these calibers differ from machine timing and worn timing at a very consistent rate.

For example, on his timing machine a movement may be running 0 SPD, when worn is -2. He said this has been very consistent. Since his study began, variations are always slower on the wrist with these movements. So far the least to the greatest has been -1.6 to -2.3. Thought this was interesting.

[Dirt]

Originally Posted by DJ2020

I realize many people have had issues with there 3235. My DJ2 2017 ran for 3 years before I sold it and had no issues. Started at -2 SPD, and 3 years later it was still -2 SPD.

In a interesting conversation with my watch technician, He has been doing a little study on the 3235 and 3255 regulations. All his testing equipment is from rolex. He has a simulation machine that turns watches at different positions and records deviation over several days in different positions to simulate daily wear. He has noted that watches with these calibers differ from machine timing and worn timing at a very consistent rate.

For example, on his timing machine a movement may be running 0 SPD, when worn is -2. He said this has been very consistent. Since his study began, variations are always slower on the wrist with these movements. So far the least to the greatest has been -1.6 to -2.3. Thought this was interesting.

Very interesting
Thanks for sharing this insight
I should imagine that as long as the results are able to be replicated with a high degree of certainty, then it will be easy to compensate for the discrepancy when adjusting the movement.

[DJ2020]

Yes, that's what he was doing with my 126200 and 116000.
My 126200 is set by machine at +2.3 to give me a -0/+0 regulation. The 3130 is not as consistent as the 3235 and varies -1 to +1 per day and requires me to take it off at night and place it in a dial up position to compensate the loss. If it +1 I just wear it threw the night and it's back to 0 by morning.

[Wood&Leather]

Originally Posted by \

\ Started out at -2s/day and ran progressively slower so finally shipped it to RSC in October 2018. It came back running great, on average about +1.5s/day. That lasted until early 2020 when I noticed it was approaching -2s/day.

Someone call Barbara Walters.

[Annan]

Originally Posted by Wood&Leather

Someone call Barbara Walters.

Yes, I'm well aware it's only a matter of a couple of seconds but the point of my comment was that the watch started running slowly again. This shows the RSC fix (lubrication) was only temporary. The 32XX movements have a design issue that needs to be resolved. Do a search on TRF and you will see numerous posts by Bas that will explain this further. There is absolutely no need to call Barbara Walters at this point unless she has become a CW21.

[dannyp]

Just found this old thread when researching magnetization. A couple questions:

1. Will a demagnetization device work no matter what parts are magnetized?
2. Why would the watchmaker need to regulate in addition to demagnetization?
3. Will typical magnetization tests pick this up?
4. Any chance this is the cause of the premature wear on some of these parts - unaddressed magnetization increasing friction?

[padi56]

Originally Posted by DJ2020

I had my watch regulated a couple weeks ago. It was running -4, the repairman stated he increased the timing by 3 seconds and to wear it a couple of weeks and see how it does. It was running a vary consistent -2 each day of the two week trial. That includes being VERY active for 5 day straight and very inactive for two days straight. X 2 weeks. Each day still measured -2. Like I said, very consistent. (Also worn 24/7). I went back today and was told it's magnetized.
Has anyone experienced this behavior on the 3235 yet?

When any movement gets magnetised in general they speed up and run very erratic so extremely unlikely your watch was magnetised.

[dannyp]

Originally Posted by padi56

When any movement gets magnetised in general they speed up and run very erratic so extremely unlikely your watch was magnetised.

That's what I thought, but it said elsewhere in this thread (and I was also told by a watchmaker I corresponded with) that this was mostly true for older watches, at least Rolexes, because it's what would happen when the hairspring would become magnetized. However, sounds like other parts, if magnetized, can have much smaller impacts and they can be in either direction.

Perhaps these went entirely unnoticed before people started keeping track of their watch timekeeping with little electronic devices.

[Dirt]

Originally Posted by DJ2020

I wonder if its possible for the case, bezel or band can be slightly magnetized. Not sure if 904L can be. Does anyone know?

904L Stainless Steel can not be magnetised.
It is classed as Austenetic just as 316L is Austenetic, which means they are naturally in an Austenetic state which also makes them non-magnetic and a magnet cannot stick, nor will it ever be possible for it to become magnetised. Only god himself can magnetise the stuff so it's not a factor

FYI, 304 Stainless Steel is classed as Martensitic because it's naturally in the Martensitic state which makes it slightly magnetic. It takes a rather strong magnet to stick to it and it can be questionable whether a magnet can stick on thin material at times. When the magnet is removed it is unlikely to retain any magnetism if I remember correctly

My memory is getting rusty and my knowledge base goes back a good number of decades, but this is basically the state of play with the common Stainless Steel watch case materials these days
Warning: don't try this testing with strong magnets business at home for yourself unless the movements are removed or the results may become a problem

[Dirt]

Originally Posted by dannyp

That's what I thought, but it said elsewhere in this thread (and I was also told by a watchmaker I corresponded with) that this was mostly true for older watches, at least Rolexes, because it's what would happen when the hairspring would become magnetized. However, sounds like other parts, if magnetized, can have much smaller impacts and they can be in either direction.

Correct

FYI, I've magnetised the movement in a 114270 back in the day. Rolex happily de-gaused it for me FOC as it had only just returned from a service a week or so prior.
I was doing some serious spring cleaning and moved some large loudspeakers whilst wearing the watch. That's the only time I have ever magnetised a watch