Why my seiko speedtimer 7015 chronograph run smoothly when its day(morning till evening)
But its stop and heavy when its time to changing the day date,whats the problem and how to fix it..
For light duty, the Chinese made stainless steel models are ok. But they do not last for ever. Make sure you use a basket which suspends the mass from the base as this interferes with how the bath resonates.
Ultrasonics are a bit of a no-no for earlier work, especially where brass has been work-hardened as it creates microscopic fractures which deteriorate when treated to ultrasonics. By “early”, I’m taking Victorian and earlier, and mainly plates.
However, they are still very useful for some parts - I used an Elma ultrasonic for cleaning some fusee cones and steel chains earlier. I used Horolene which is very powerful for the brass cones, and L&R watch cleaner for the chains as it is oil-based an so would not subject them to water where possible.
Staff and roller might differ, so I put the new balance with the roller attached plus the fork and put the cock on, if it fit and did impulse, I might have chance to build a balance complete.
Isn't moving either one enough?