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Balance Cock Height

mikecj
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mikecj Member

mikecj

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Everyone,

I'm working on an ETA 2472. Everything has gone well so far. However (there's always a however), when I install the balance it starts up just fine. When I tighten down the screws to snug, it continues to run. When I tighten the screws, the balance stops dead. The upper jewel is an Incabloc setting held in place by a u-clip on the underside of the balance cock. The lower jewel is an Incabloc setting held in place by a screw. I'm pretty sure the balance staff is straight and has no issues.

So, I need some advice:

1. Do I live with the screws in the snug position and hope they don't back out?

2. Try to install a shim in between the main plate and the balance cock. I used a dial washer on another watch for a similar problem and it worked.

3. Adjust the height of the jewels within the Incabloc settings. If so, how does one do this? I do have a Horia tool.

Thanks,

MikeCJ

IMG_20250507_132943622.jpg

IMG_20250507_133010732.jpg

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