Saturday, 3 May 2025

First balance staff replacement

 Top pivot for Ronda RL 5111 17 jewel pin pallet bent, roller table not sitting flush either.



Tried to straighten the pivot using the Seitz pivot breaker; worked as intended. Pivot broke.

 


 Hairspring removed.
And the roller table too.


 

Next, removing the staff. Such little force was needed; only a few taps with the back of tweezers.

 



The balance disassambled. One bent and another broken pivot.


 Measuring the staff; there are three available staffs for this movement, one for incabloc and two for pin pallet. 0.01mm difference in pivot lengths between the two for pin pallet but the endshake doesn't seem adjustable. Is balance endshake adjustable? I thought it wasn't.





Replacement ordered; pack of 3. Cousins only had three in stock, more of the longer staff.

No comments:

Post a Comment

Stowa Durowe 72 (1964 to 1970?)

  My mother had this old, beat up watch that barely worked and gave it to me to take a look and check the battery. Opened it up and found th...