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bsoderling

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bsoderling last won the day on March 24 2018

bsoderling had the most liked content!

About bsoderling

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  1. bsoderling

    One more to id...

    Thanks Nickelsilver, I think you are on the right track with Buser 25. And it’s a 10,5”’ Sent from my iPad using Tapatalk
  2. bsoderling

    One more to id...

    Working on this unbranded movement that is causing me headaches. I suspect that the h/s is not the original as the collet has been brutally squashed together to stay on the staff. Runs fine with dial side down but misbehaves with low amplitude when flipped. And the h/s stud has to be pushed high up to have the h/s reasonbly flat. There are a couple of design features that to me are a bit unusual: - The screws holding the cap jewel go in from the top of the balance cock. I usually see them (annoyingly) going in from the other side and efficiently preventing any inspection of the cap jewel without removing the balance from the cock. - the ”pin” defining the setting/winding positions is here part of the setting lever spring rather than the setting lever, which I find much more common. If anyone can hint on the make, I am very grateful! Sent from my iPad using Tapatalk
  3. bsoderling

    Jewelling question

    I think I did pretty much that. As you say, wiggling the jewel on the pivot is a decent way to ensure there is a reasonable side shake. Good to know it’s used by others. Sent from my iPhone using Tapatalk
  4. bsoderling

    Jewelling question

    Cool...! Thanks ! Sent from my iPad using Tapatalk
  5. bsoderling

    Jewelling question

    One thing is sure; human behavior never seize to amaze... A quick update on my progress. I decided to fit the jewel without trying to reduce the hole first, just to see how loose it would be. When pushing the stone in, after a bit it suddenly shatters in small pieces. I suspect there was an edge or burr or something that pinched too hard at some local point. Almost caved in at that point but decided to have a look around some other less fortunate movements in my drawers. And indeed, an old pin pallet movement I never got to run had a jewel with the same dimension and this time the pushing-in worked better and the jewel seem to sit safely. Regarding the technique to reduce the hole with a domed punch, I suppose one has to be very light handed to not overly deform the edge of the hole too much? As I see it, all the force from the punch will be focused on that tiny area where the dome meets the hole corner. I suppose what one wants is to have material deeper into the hole to expand and reduce the diameter, without creating burrs and deformations on the edge? Sent from my iPad using Tapatalk
  6. bsoderling

    Jewelling question

    Hi, Photos are attached and I think you are probably correct. Looking closer, what I thought was a boundary between the chaton and the bridge inside the hole, probably is just the edge between plating and brass. Hopefully you can judge from the photos? Sent from my iPad using Tapatalk
  7. bsoderling

    Jewelling question

    When cleaning a movement in my ultrasonic a jewel in one of the bridges came out and needs to be put in again using my not so often used Seitz set. When inspecting the hole I note a couple of tiny (maybe 1/4 of the hole diameter)circles at the edge that I started to suspect may come from a previous trial to tighten the hole just slightly with a punch around the hole edge. I have attached a photo that I hope shows what I think can be the punch marks. Would this be an ok method to tighten the hole and something I can repeat as I guess the jewel will not sit very safely when pressed in again? When viewed from the top side, I note that the hole is lined with a brass ring that doesn’t go all the way through. Why were these brass linings used? Softer material? Sent from my iPad using Tapatalk
  8. bsoderling

    Loose roller on new balance staff

    Sorry if the wording isn’t correct. I was referring to the cylindrical part between the roller table and the opposite part with the notch for the protection pin on the pallet. Sent from my iPad using Tapatalk
  9. bsoderling

    Loose roller on new balance staff

    Gave it a try tonight. No success I’m afraid. The roller tube was really soft and got compressed and tilted even with the lightest tap on the punch. It sort of stayed on the staff anyhow but then I managed to break off the inner timing pin when turning it back to the right position. One off those without a slot for a screwdriver that you have to grip around to turn. And I got careless... When it rains it pours.... Donor movement anyone ? :-) Sent from my iPad using Tapatalk
  10. bsoderling

    Loose roller on new balance staff

    Yeah, now I just have to give it a try.... :-) Sent from my iPad using Tapatalk
  11. bsoderling

    Loose roller on new balance staff

    Another piece of info - I turned the roller upside down on the staff and seated that way it doesn’t go all the way down. To me this would indicate that the roller isn’t far away from what it should be. It’s more like it may have become somewhat widened from being pushed onto a staff a few times. Sent from my iPad using Tapatalk
  12. bsoderling

    Loose roller on new balance staff

    Thanks for all the info and contributions. This is what makes this forum such a great place! I checked around a bit and indeed, the there seems to be a Renata complete balance available for the movement. Cousins can also sell me a complete balance at 50 £, which is roughly 10 x what I paid for the watch in the first place... :-) Closing the hole with a punch seems to be a viable and used method here, even though not easy. Will gather some courage to take that on. Regarding the ”alternative” methods I am not one to shy away for the odd eyelash now and then. If I can save a close to historic watch from the scrap heap and doing it as part of my hobby and learning curve, I’m fine. I can always return to the thing later and do better if I learned how to. So from that point of view a non-destructive shortcut can be a better alternative than hammering away with something I’m not comfortable with. (Been there, done that ...)
  13. bsoderling

    Loose roller on new balance staff

    Interesting! Is that info that can be dug out from various old catalogues (bestfit ?) ? Sent from my iPad using Tapatalk
  14. bsoderling

    Loose roller on new balance staff

    I googled a bit for ”hole closing punches” and the method appears mainly used for closing worn pivot holes in brass clock plates. Which is obviously a quite different thing than working on a tiny roller from a wristwatch movement that , as pointed out, may be made from a much harder material and may split rather than give away. If there’s experience out there from this specific item, please chime in as I’m interested in arguments in any direction. Sent from my iPad using Tapatalk
  15. bsoderling

    Loose roller on new balance staff

    Nothing wrong with the right parts. Question is what is right in an old movement from the 30’s with unknown service history? The staff was purchased to fit a Bifora/Bidlingmeier 102. Maybe parts were swapped out for out-of-spec items at some earlier work on the watch making compatibility hard later...? Sent from my iPad using Tapatalk
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