Jump to content

Valjoux 724 baseplate issue

donmenzies
 Share

Recommended Posts

Nucejoe Distinguished Member

Nucejoe

Posted
Posted

 

1 hour ago, donmenzies said:

 The tube in the baseplate that takes the tip of the stem is worn allowing the stem to jump out when  time setting. 

 

Make a stem with longer tip. 

As for repairing the hole, need to see a clear close up of it. 

Rgds

Link to comment
Share on other sites
nickelsilver Distinguished Member

nickelsilver

Posted
Posted

A stem with a longer pivot risks fouling the minute counter shaft, which passes through just a short distance away. It is possible to remove the remains of the tube and open up the hole and press fit a new tube, but it's very tricky work preferably done in a jig boring machine.

  • Like 1
  • Thanks 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
 Share
Go to topic listing


  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • ColinC
      404 Club Reboot

      By ColinC · Posted

      Speaking of 404 reboot.... I have another category of watches... Those that I wished I had not gone above £4.04 when I bid for them!!! Someone probably should have also told me to stop before I put a new stem, crown, crystal, escape wheel and then adjusted the end shake on the escape wheel. This was all on watch that had a EB 8800 pin lever movement in a worn gold plated case with a snap on case back (basically everything I try to avoid!).  
    • nevenbekriev
      Unknown mechanism

      By nevenbekriev · Posted

      The problem is that this movements were not produced with the modern level of standartization, there for parts from one didn't fit well to another, even if they may look the same. May be it doesn't concern the winding stems, but yet there are not spare parts for such movements in supply companies, not even clear calibre identification possible. And where calibre identification  is possible, there are no Ronda numbers for the balance staff or the winding stem for this calibers in the data bases.
    • ColinC
      Black coating on shock jewel metal housing

      By ColinC · Posted

      That black stuff - I had similar things happen with evaporust!  In that case I understand the evaporust eats the iron oxide away without hurting the metal but it can leave behind a layer of carbon which was in the steel that got oxidised. I spent ages trying to perfect a cleaning regime with various different stages in jars in an ultrasonic bath. In the end I switched to washing all but the balance and pallet fork in IPA and gently brushing it with a small artists brush.  I would estimate that I have found an extra 20º of amplitude doing this! It also takes me no longer than waiting hanging over a tank to move stuff to the next jar If it is really bad then I have used the IPA as a prewash and go through my old routine
    • Giogrlj
      Unknown mechanism

      By Giogrlj · Posted

      I thought is FHF. Sounds good to make winding stem by myself but I am not in watchmaking on this level. 😄
    • RichardHarris123
      Favourite timepiece.

      By RichardHarris123 · Posted

      Yes, Swatch, booooooooooo!!!
×
×
  • Create New...