Jump to content

Omega Seamaster Cosmic 1969 cannon pinion tightning?


Purra

Recommended Posts

Hi, 

I've bought a Omega Seamaster Cosmic manual wind from 1969 with probably a loose cannon pinion because it lost time. I tried to tighten it but split it in half. I ordered a new cannon pinion for this cal. However when i'm placing it it doesnt need any force to place. It drops right in place. Could it be that even the new cannon pinion needs tightning? The hour and minute hands just don't move now, only when I pull the crown. I was expecting that a new cannon pinion would instantly solve the problem buf it didn't. Or could there anything other wrong. 

I tried to let it be serviced but my watchmaker refused because I didn't but it at his place. And I want to learn watch repairing. 

Yours,

Link to comment
Share on other sites

4 minutes ago, Purra said:

I will clean it, so you're saying i need to tighten the cannon pinion? Do i need to feel some resistance placing the cannon pinion on the tube? 

Thanks for the pics. 

Yes. It should fit on with a push. Just make sure you do not damage the teeth to the minute wheel. 

Link to comment
Share on other sites

Yes you feel some resistance thereafter, tighten in small increments/ turns towards the end, keep trying the canon pinion on the tube. 

I have never tried this with the tube in the movement. Do not remove the pinion off the nailclipper prongs during the entire tightening process, grab somewhere in the midle of the tube. 

Good luck

Link to comment
Share on other sites

1 hour ago, Nucejoe said:

I have used a piece of sand paper to falttened sharp blades of the nailclipper to prevent damaging the canon pinion. 

Good luck pal

    good show.  i would use a stone or file to Dub the sharp edge.  put a drill rod in the tube before making the crush. you can very the crush via the drill rod size.    vin

  • Thanks 1
Link to comment
Share on other sites

I checked the sheet. I have ordered the 1219  (2.70mm) This measurement is the height, right? When I compare both the old cannon pinion with the new one. I can't find a indentation on the new one, but I also had a hard time finding a indentation on the old one when it wasn't broken yet. It seems perfectly round. 

It looks like this:

Afbeeldingsresultaat voor 560-1219

 

image.png.797d7074b794fbf1e86faf6c919ff8ce.png

Link to comment
Share on other sites

1 hour ago, Purra said:

Here are the pics of the canon pinion before tightening. Thanks for the clear instructions. 

So my best shot is now cleaning the tube and tightening the cannon pinion I guess.

IMGur: https://imgur.com/a/hvGAlEg

 

IMG_7974.JPEG

IMG_7975.JPEG

IMG_7976.JPEG

IMG_7977.JPEG

IMG_7978.JPEG

Can,t see the minute arbor, on which min hand gets mounted, if so OH predicted correct," wrong canon pinion, it is just too tall"

Link to comment
Share on other sites

Purrs, from the s it looks like the center wheel staff is much smaller than the cannon pinion. Is ther visible space between the staff and the cannon pinion? If so, perhaps the center wheel post is worn or not original? To tighten the cannon pinion to fit the staff should be an imperceptible adjustment measured in microns. If you have to tighten a visible amount, I think something else is afoot.


Sent from my iPad using Tapatalk

  • Thanks 1
Link to comment
Share on other sites

It doesn't feel like its moving at all when I perform a side shake, its not loose on the sides but it does fall in place without force. Silly question: The minute hand is mounted to the cannon pinion, right, and not to the center wheel staff.

  • Thanks 1
Link to comment
Share on other sites

It doesn't feel like its moving at all when I perform a side shake, its not loose on the sides but it does fall in place without force. Silly question: The minute hand is mounted to the cannon pinion, right, and not to the center wheel staff.

Depends on if there is a center sweep second hand. If not, yes. The minute hand mounts to the center wheel staff.


Sent from my iPad using Tapatalk
  • Thanks 1
Link to comment
Share on other sites

2 minutes ago, Purra said:

It doesn't feel like its moving at all when I perform a side shake, its not loose on the sides but it does fall in place without force. Silly question: The minute hand is mounted to the cannon pinion, right, and not to the center wheel staff.

Sorry :)

Link to comment
Share on other sites




  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • I've remained silent on this thread, and at the risk of upsetting everyone, the thing that worries me the most the the apparent absence of Mark. The moderators do a great job and the members also pitch in, and the site seems to run itself, but it is a concern for the future of this forum when the owner is absent for all intents and purposes. Like many of the comments above I would hate to log in one day and things be closed down as I rely on this site for ideas and knowledge and also cheer me up. maybe the Moderators could reach out to him, assuming he does not read this thread, and express our concerns and let us know the plans going forward? some kind of WRT ark
    • That was the exact reason for me starting this thread watchie. Still we haven't worked out how the regulars are going to hook up if it goes tits up. I honestly think something should be arranged to stay in contact, we all help each other so much. 
    • Yeah ive watched that a few times before,  i couldnt find my old school dividers to scribe it up 😅 Yep thats the guy i bought a roll from . Thanks Nicklesilver that answers that perfectly and more or less what i thought an experiment over time would prove . The jumper arm is quite thick along its length, i left it that way intentionally, i thought the original was probably very thin, i didnt see that it was already missing. Setting isn't particularly stiff as such just positive, i still need to take it out and polish where it mates with the stem release. 
    • Yes, "Sold out" is difficult to understand. There doesn't seem to be a lot going on. It's been nine months since any new video was published on the Watch Repair Channel. The Level 4 course on watchfix.com has been in progress for what feels like forever (several years!?). Maybe Mark's enterprises aren't doing well or perhaps already so profitable there's nothing much to motivate him for more material. Or, perhaps these days he's more into crochet. The real reason is probably something entirely different but it would be nice/interesting to know. I don't mean to sound gloomy or pessimistic, but I wouldn't be surprised to be met by an HTTP 404. Every day feels like a gift. Speaking of watchfix.com I've been postponing the "Level 5: Servicing Chronograph Watches" course for a very, very long time. Anyway, I just enrolled on it so it's going to be very interesting to see the videos. I must say, IMO there's nothing really that can compete with Mark's courses when it comes to presentation and video quality. It's simply world-class and makes me associate with some really expensive BBC productions.
    • Steel has some funny properties, or at least counterintuitive. The modulus of elasticity is effectively (not exactly, but close enough) the same for steel that is annealed and hardened. What changes is the point of plastic deformation* . If the movement of your spring doesn't pass that, it should work fine. It looks a little thick, I would thin it a bit maybe from the main body out about halfway, maybe 10-20% thinner (not in thickness, along its form). But if it works it works!   *So- if you have two bars of the same steel, one annealed, one at 600 Vickers (general hardness watch arbors might be), clamp them to a table so the same length is hanging out, and put a weight on the ends, they will bend the same amount. But if you continue to add weight, then remove it, at a point the annealed bar won't return to its original straightness. That's the point of plastic deformation. But up to that point, as springs, they are the same. However- their wear characteristics will be very very different. And getting the hardened bar past its point of plastic deformation takes a lot more effort.
×
×
  • Create New...