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Hairspring stud alignment

JohnL
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JohnL Watch Enthusiast

JohnL

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I have a hairspring which is skewed. Looking at it the the stud appears to be at an angle, and probably too high. Is this likely to be the only thing causing the hairspring to be skewed as it is? 

The other question is, how much is this likely to affect the rate of the watch? It's got a new mainspring and the amplitude is roughly 270. I'm assuming/ hoping the fluctuation is down to the skewed hairspring. I don't believe the hairspring is touching the balance wheel.

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nevenbekriev Distinguished Member

nevenbekriev

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Hi John,

Actually, if the stud stays firmly in the stud carrier, there is no mater that it is not perfectly upright. The important thing here is to align the hairspring to be centered and parallel to the balance. This is done by bending and twisting the spring right where it comes out of the stud.

If You expect that making the spring parallel will improve significantly any 'fluctuations', then You probably will be disappointed. If the spring now doesn't touch anything in all positions of the balance wheel when it turns, then no reason to expect improvement from the un-skewing itself. It will just make 'touching' less probable, and the spring will look more hansom.

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SwissSeiko WRT Addict

SwissSeiko

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I agree with Nev. Make sure that the regulator pins aren't touching the hairspring when it is at rest. Move it through the entire range of adjustment to check it.

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JohnL Watch Enthusiast

JohnL

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3 hours ago, SwissSeiko said:

I agree with Nev. Make sure that the regulator pins aren't touching the hairspring when it is at rest. Move it through the entire range of adjustment to check it.

Thank you. I shall check that as soon as I can

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