Fix jewel in Rolex 3235 minute wheel

[Delgetti]

Hello,

 

so I‘m working on this Rolex 3235. It has a new wheel train compared to the 3135, minute wheel (blue) and fourth wheel (green) both in the centre.

 

So the upper bearing for the fourth wheel is a jewel in the minute wheel.

And this one woobles. I think it is not press fitted but just put in and secured by caulking (there are very tiny dents on the radius).

So how can I fix this? Just use a conic punch in the staking set and hit it with a small hammer very carefully? Do I have to hold the jewel somehow during this process to ensure it is positioned absolutely flat? Or is there a better method?

A spare part is availiable but expensive. So I would like to try a repair first. If I fail, I still can buy the spare.

[Kalanag]

Sorry for being off topic: Why do you think the central position of the second and fourth wheel is a new design? The jewel bearing of the fourth wheel inside the second wheel is identical with the cal. 3135 imho.

Edited February 18, 2023 by Kalanag

[Woolshire]

I’m wondering what you ended up doing here? That’s an interesting layout, having a jewel inside the hollow pinion. My first thought was to make sure it is actually the jewel moving to create the wobble. It would have to be, if not a damaged jewel hole.