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Showing results for tags 'balance spring'.
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While disassembling a Unitas 6497 (or during subsequent reassembly) I slightly deformed the hairspring, and to fix it I removed the wheel from the balance cock and then the hairspring from the wheel. The balance cock is of the Etachron type, so the index pin is simply clipped into the stud support. The spring sits inside a notch on the underside of the pin, and is secured in place with some sort of gummy, flexible adhesive (instead of a tiny pin, as I've seen elsewhere). Anyway, I had a lot of trouble getting the spring stud back into the stud support, and after about an hour of man-handling the glue finally gave out and the spring came loose. Now I have a spring (in perfect condition, thank you very much!) and stud I need to reattach to each other. What kind of adhesive is this? What are some accepted ways of reattaching the spring? I saw someone on the internet use shellac, but 1) I don't think that was the correct thing to do (this stuff was flexible, and probably for a reason) and 2) I don't have shellac or know how to use it regardless. Thanks for reading, and thanks for any help you can offer! Here are some pictures to help visualize what I'm talking about: