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To be honest I never use calipers when bending a balance bridge as I'm checking the end shake as I do it a little at a time. Now that you've bent your bridge how Has it changed your end shake? -
@nevenbekriev @JohnR725 @mbwatch So I’ve attempted to bend the bridge as best I could. It’s difficult for me to use my (cheap) calipers as a reference point because they don’t lock, but I did my best. My bet is that I bent the bridge by maybe 0.1mm. Enough that I could see a difference with my naked eye through my loop, looking at displacement at the end of the bridge. With that done, I re-attached the balance wheel and did the oscillation tests again. No real change. DD is about 45 seconds, DU similar (though a little harder to measure upside down). In terms of the hairspring @nevenbekriev, looking closely, to my inexperienced eye, it looks as if the coils are slightly tighter on one side of the hairspring relative to the other. They don’t appear to be touching, but there is less separation between the coils. -
By RichardHarris123 · Posted
I would go for the red Loctite -
Here is a pic: It sticks out about 1mm from the case tube (thanks again for the terminology!). Remember as well that the crown not only allows the stem to slide in, but the case tube also is fully inserted into the crown as well. I eyeballed it and it seems to me that the stem goes into the crown right up until the crown goes convex so I don't think it could go in any farter which would lead me to believe it wasn't snapped off (I hope!). -
Or maybe even the wrong stem for the case. I would use Loctite, and I guess as Hector suggests red would be better then blue. It's really made for this job and it gives you more time to work and clean up than CA does - so you don't end up gluing the whole assembly to your own thumb because a lot of glue is going to squeeze out and immediately dry onto the stem. Red Loctite should hold it very firmly but you can wipe it away before it becomes a problem.
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