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New balance assembly with Breguet hairspring fitting to balance cock

Ilike2rolexmoveit
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Ilike2rolexmoveit Member

Ilike2rolexmoveit

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Hey fellow watch techs and makers (hobbiests as well)! I am working on a Rolex 1575 and to skip over details here.. I have a new balance assembly that i am trying to install onto the balance cock correctly. The assembly is Rolex part 8106. When I unpackaged the assembly I tried mounting it to the balance cock and noticed that when I move the regulator pin while the balance is installed the coils of the hairspring bunch up from side to side depending on which way of course I move the regulator. To fix this I know that the terminal curve at least for a flat hairspring must be concentric and that the collet should remain in the center when moving the regulator. When remove the hairspring from the wheel and affix it to the cock and move the regulator.. it moves every which way. I’ve not affixed a brand new hairspring and balance to a balance cock of a Rolex in my servicing time. I’ve been certified online for servicing and fault finding so I do know the jargon, if anyone could write out some steps to take that would be awesome! This is the 9th Rolex 1575 I’ve serviced, but the first time one has needed a new balance assembly. (The old one had two timing screws super glued to the balance wheel, the super glue make a pancake out of the hairspring.. a stick together pancake.) the watch has been disassembled, cleaned, reoiled and is waiting for it’s balance. There are no other problems with the watch. I appreciate this guys! Merry Christmas to you all! 

JohnR725 Distinguished Member

JohnR725

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On 12/16/2018 at 11:23 AM, Ilike2rolexmoveit said:

I’ve been certified online for servicing and fault finding

What happened to the old balance wheel? Sometimes background is nice to understand why your replacing it?

Then I'm curious certified online certified by who?

Picture of the regulator would be really really nice because? So the 1575 is based on the 1530 which in the parts list does have a regulator. The parts list of the 1575 does not show a regulator which doesn't necessarily mean much because it would mean that it would use the 1530 regulator. But at the link below the indication is that the 1575 Free sprung which means no regulator. Then googling produce the second link which has a nice picture of the 1575 movement Which most definitely does not have a regulator?

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Rolex_1575

https://quillandpad.com/2018/06/15/exceptional-movements-in-history-rolex-caliber-1575-the-watchmakers-watch/

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