Jump to content

Mainspring adjustment


IFELL

Recommended Posts

Hi all,

I had to replace mainspring on this ETA 2782 but after I fitted it into the barrel I found out that the end of it does not engage with the hook on the barrel arbor. 
I guess this can be fixed by adjusting the final turn of the mainspring so my question is: what tool to use? I found variety of pliers on Cousins but I'm not sure which are suitable for this kind of job.

Thanks for your advice and suggestions.

 barrel.thumb.jpg.3d0459054efda07497c8a70d9a25609b.jpg

Link to comment
Share on other sites

Be careful not to put a straight line bend at the point away from the arbor end where the slot for the barrel arbor is cut from the mainspring. It will almost certainly fail when wound a few times. That area needs to be a smooth curve to maintain strength.

I have an assortment of piano wire I use for re-pivoting clock arbors and I select progressively smaller diameter pieces to use as a mandrel when bending the curve. Round bar stock works well for larger barrel arbors, but lately it seems all I get is 5''' ladies bracelet watches.

Link to comment
Share on other sites

  • 4 weeks later...


  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • That would be something! Which brings me back to;  
    • you think you're going to sleep tonight you're not, you're going to ponder the question of what makes you think those of the right parts?  
    • Does anyone knows what size case a need for a dial diameter 20.60mm?
    • Sounds like the story with my Rolex. Poor (expensive) job done by an official Rolex dealer with an "in-house" watchmaker, hence I learned watchrepair and did the servicing myself. Same story as I learned with the Omega 861, again poor job by an "in-house" watchmaker by an official Omega dealer. Once your watch goes through that back-door, you have no idea what is going to happening to it 🫣   Quite nice that they sent back the parts which had been replaced !
    • yes that's definitely not right at all. I have a picture one of my friends has a Omega coaxial there was having issues to lose asking me where he should send it. As that's a specialty watch I suggested the service center. When he got it back he sent me a picture so the replace the dial as you can see the hands the mainspring barrel and I think the price was really quite decent considering all the stuff they can replace. So I do know they do change the barrels but the other person I worked at the service center when I would ask questions and unfortunately I can't remember all the answers. I think a lot of the changing a parts is at the discretion of the watchmaker. Plus I don't know enough about the chronographs and whether that would be considered a vintage watch? I take some of the vintage watches may have been sent directly to Switzerland or another service center. Obviously with a watch like the one down below they probably have a infinite supply of parts is its relatively modern vintage stuff becomes more interesting even the watch companies don't have necessarily infinite supply of parts. But no matter what the watch shouldn't disintegrated six months that's definitely an issue.        
×
×
  • Create New...