Jump to content

ST36 hairspring attachment to stud weird

Flubber

By Flubber
in Watch Repairs Help & Advice

 Share

Recommended Posts

Flubber Watch Enthusiast

Flubber

Posted
Posted (edited)

Hi all, me again.

I've taken Mark's course and bought two ST36 ( ETA 6497 clones) that I use for practice and experimenting. Today when I was assembling the movement and checking if the impulse pin was in the correct location the hairspring detached from the stud. I checked on the other movement to see how the hairspring is attached to the stud and the balance cock. It looks as if the hairspring is glued to the stud with some sort of paste that is quite hard. It is not attached with a tapered pin that is inserted into a hole with the hairspring.

My question is what I'm looking at. Is the hairspring glued or actually welded somehow and how may I fix it ?

Edited by Flubber
Clarification and spelling.
Link to comment
Share on other sites
nickelsilver Distinguished Member

nickelsilver

Posted
Posted

I don't know that movement, but most modern movements have the hairspring glued at the stud. When they de-glue from cleaning I usually use 2 part epoxy (Araldite for most continentals), 5 minute, to reglue. Last one I tried UV glue as I know the guy and if it doesn't work longterm it's not an issue.

They aren't supposed[/] to unglue from normal cleaning but it happens.

  • Thanks 1
Link to comment
Share on other sites
JohnR725 Distinguished Member

JohnR725

Posted
Posted

Gluing hairsprings is not a new practice. The Elgin watch company pioneered this it was done to avoid stressing the hairspring. Traditionally a pin is used and that can distort. Modern methods Use various forms of laser welding or other welding.

Unfortunately the Chinese were not as thoughtful as Elgin and their glue has a habit of disintegrating if you attempt to clean the watch more than a couple of times. Epoxy should work fine probably best if you could do it in the watch because the stud will be in perfect alignment with the hairspring. Unfortunately there's not a lot of room to work.

  • Like 1
Link to comment
Share on other sites
 Share
Go to topic listing


  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • Neverenoughwatches
      Questions about my Bravingtons Renown Mantel Clock

      By Neverenoughwatches · Posted

      Hmmm you know when i said some damp might have caused the bubble originally hmmm 🤨
    • Neverenoughwatches
      404 Club Reboot

      By Neverenoughwatches · Posted

      Are you all jerking my chain, I'm a yorkshireman £4.04 is too much 😆
    • Kkramme
      Blew it with a coil

      By Kkramme · Posted

      [Myota2034] Custom simple quartz watch — PricewaterhouseCoopers On a very very different note, here is a watch from approximately 2000 when I was a Partner with PwC, Management Consulting. It was a simple “marketing watch” with a clever “vase of knowledge” that is subtly revealed on the dial as the second hand progresses. Clever for a simple watch!⌚️
    • Neverenoughwatches
      Mainspring winder question.

      By Neverenoughwatches · Posted

      I think someone else has though. Some where here using a modified perspex sheet. I may be wrong i may be right , i think it involved fitting the arbor to a pin vice. I dont have experience of the bergeon winders, are the handles not interchangeable ?
    • Neverenoughwatches
      Dial Dots

      By Neverenoughwatches · Posted

      Never tried dial dots, i always considered them as a bit of a bodge.  You are adding something that was never intended to be there. I wonder how the adhesive reacts to any part of the movement, hot summer heat and i think things might turn sticky. Most adhesive backed stuff has a tendency to soften and slide around so it may spread, i have used a lot of so called sticks all adhesives in my industry that are just not up to the job. I suppose they get you out of a problem quickly, but how permanently might that be ? I would just explain to the owner that it may or may not work. WWs other ideas are a much more permanent solution but both have their risks . I've tried milling and dial feet replacements, hmm it was ok, ive heard of folk dimpling the face , so that needs care . And i have soldered a few times , all with good results but i am very careful and I practiced it a lot.
×
×
  • Create New...