Repoising a Rolex 1675 GMT balance wheel
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- Опубликовано: 10 окт 2023
- Static poising of the balance wheel in a Cal 1570 for a Rolex GMT 1675 using a micro drill to cut metal out of the balance wheel to bring the delta down from 49 to 4 seconds across 5 positions
www.truepatina.com
Exceptional! As a client of Greg's watchmaking skills, his work is impeccable.
Thanks...that is the kind of stuff that is helpful to us newbs just starting to delve into adjusting across different positions.
The "flip-flop" symptom of a balance needing poising was good.
Awesome Work !!!
Really appriciate you showing the positional variations in rate and amplitude.
So many channels 'restore' or 'service' a watch and only show DU rate and amplitude at a full wind right at the end of the video, which really doesn't tell you anything. The difficulty of servicing a watch is not in getting a rate of 270 degrees amplitude 0s/d in the DU position. You can do that easily (and cheat) with a stronger mainspring and moving the regulator arm on the balance (you don't even need to service the watch properly). The hardest part is getting the lowest delta possible at the lower amplitudes in as many positions as possible.
I look forward to more vids :)
Excellent video...thanks for taking the time to make it.
Glad I've come across your channel recently.
Subscribed 👍🏻 excellent content.
Thank You for a look at how to physically poise a balance . I have just subscribed and would already like to make a request . Your photography is great by the way ,
I would like to see a video dedicated to things related to the balance complete including the Balance cock , wheel ,hairspring , and regulating adjusters .
More to straightening a hairspring like correcting the flatness close to the collet , completely disassemble and reassemble both shock protected and non-protected jewels , regulator and stud adjusters etc . Once again , Thanks for the video .
That was fascinating. Thank you for sharing your knowledge and skills with us.
Great job and great video montage. Thanks from Spain.
That was freakin brilliant.
Amazing demo and very educational. Thanks you.
Fascinating video ! Awesome work!
Keep the videos coming!!!! Outstanding!!!
很專精
I envy your tool set, patience, skill, and steady hand. This video was very relaxing on this end. How long have you been working on watches?
Thanks for the kind words. About 8 years now.
How would a balance wheel gain weight on one side? Very nice video!
Great question: Either it was out of poise from the factory and no one ever caught the issue, or (more likely) someone changed the staff and or roller table during a service which may have somehow influenced the poising dynamics of the balance.
May I ask what may seem like a dumb question, but I am just getting into knowing how to poise?. At 7:30, what is that you're doing to actually poise the balance?. I have the poising tool you level up to find the heavy spots, but I never saw anyone use what looks like one of those Bergeon automatic oilers to deal with the heavy spot on the balance wheel. Might I ask, what is that you're doing there?. I've seen undercutting and adding washers, but never using an oiler to fix a heavy spot. I'm sorry, but finding a video where the maker actually teaches you something is rare. Most just want to take the watch apart, clean and oil it, then put it back together while never addressing the issues commonly faced by newbie watchmakers like myself. Like understanding what the timegrapher is reading and then knowing how to address the issue. You actually did that, and thanks much!.
Great question: So that tool that looks like an auto-oiler is actually a very fine drill. You can make one out of a yellow Bergeon oiler if you don't have one of these. Simply cut the oiler near the thicker part of the tapper and use an Arkansas stone to grind a 3 pointed tip. You can use that to cut small divots into the balance wheel (on the underside) to decrease the heavy spot. Most watchmakers will advise to find one spot and only make one cut. While it is true to cut as little as possible, I've found that sometimes up to 3-4 small divots/cuts need creation as wheels are rarely just heavy in one very specific point but rather a broader area. This takes some time because after every slight drill, you need to go back and spin it on the poising tool to assess weight change. It is tedious but the absolute best way to get the delta tight. I used to do dynamic poising but the results were never as close and involved way more guess work than static poising like this. Just make sure not to cut too much metal out. If for instance, your microstella screws are already all the way out then you'll need to add weight instead of cutting. Thankfully this is not usually the case and you can compensate for the rate change from lost weight by moving the microstella screws outwards.
@@TruePatina Thanks so much for your help and thorough answer.
Hello, first of all congratulations on your videos, you are an extraordinary professional. I have a question for you, I have a Rolex GMT Master 1675 from 1971, it keeps time perfectly but the second hand in certain positions makes jerky movements, is this serious? with my best wishes
Thanks for the kind words. What you describe from your watch is a result of the seconds pinion friction spring being a touch too loose. A slightly tightening of this spring will fix this issue. Not a big problem or a bad issue.
@@TruePatina Great, thank you for your response and wish you an excellent day. 💪🏻💪🏻💪🏻💪🏻
Well done, is it Greg? What was the name of the tool you used to remove material? Do you prefer screwdrivers over thin hand removers? I’m always looking for balance spring adjustment and manipulation videos, do you have any? Cheers, Boyd