Jump to content

Removing Sicura Screw Back


Recommended Posts

The main points with the nut & superglue method:

 

1. It works on any screwback.

2. It works even if it rusted solid.

3. It doesn't mark the back.

4. It comes apart easily.

5. Its cheap.

6. err - that's it.

 

Nuff said.

  • Like 1
Link to comment
Share on other sites

Thanks to this forum, I found about this technique.  But initially, I was hesitant to use it.  It sounded crazy!  So I figured posting more cases of its use will give others confidence on the technique.

 

The watch in this case was from a watchmaker.  He himself wasn't able to open the back case - see all the scratches at the back.

 

post-603-0-16755500-1434170044_thumb.jpg

 

I used a superglue - remover pair from our local hardware store.

 

post-603-0-94451100-1434170030_thumb.jpg

 

It is best to center the nut as precisely as you can to facilitate easier turning.  Otherwise, the pressure exerted on the case back threads won't be even.

 

post-603-0-27071500-1434170013_thumb.jpg

 

post-603-0-77602600-1434170002_thumb.jpg

 

The glue remover turns the superglue into gel-like, allowing you to remove the nut after a few hours of applying it.

 

post-603-0-48710000-1434169993_thumb.jpg

 

post-603-0-65164500-1434169962_thumb.jpg

 

...and it leaves no mark.  Not that it matters in this case.   :D

  • Like 2
Link to comment
Share on other sites

  • 4 years later...
On 4/20/2015 at 5:13 PM, noirrac1j said:

NICE!! Congratulations on a job well done!! John that movement looks like a BFG 158 31/7 of which I have many many spare parts of every sort (including balances). You've already mentioned it was a SIC 39? I've never heard of that particular movement in a Sicura, but who knows? It sure does look like a Baumgartner 158 31/7 with 25 jewels which means they've included some jewel caps for the pivots and probably a jeweled rotor bearing for the auto-winder. If I could see the balance I could tell for sure--Does it have a KIF shock system? It is shaped like a little triangle. In any case, If you need any parts, just send me a picture of it and you can have it for free--just pay the shipping. I have entire movements so every little screw, spring, and lever is available!

Still have parts? Struggling to source a spring or two. Thanks!

Link to comment
Share on other sites

 

40 minutes ago, noirrac1j said:

Hello,

Sorry I've been caught up with current events, but yes I have lots of spares. Which springs?

 

J

I may have found the spring. Do you have any tips on assembling the date/day jumper & corrector works? For the life of me, I cannot figure it out. Separately, do you have any of the Novochoc shock jewel & springs? Missing a spring, and my jewels are pretty beat up...

Link to comment
Share on other sites

8 minutes ago, MikeRaleighNC said:

 

I may have found the spring. Do you have any tips on assembling the date/day jumper & corrector works? For the life of me, I cannot figure it out. Separately, do you have any of the Novochoc shock jewel & springs? Missing a spring, and my jewels are pretty beat up...

Yes I have lots of assembly pictures, remind me which BFG 158 31/7 you have? Is it a sicura jump hour or a Cordura day /date?

Joe

Link to comment
Share on other sites

9 minutes ago, noirrac1j said:

Yes I have lots of assembly pictures, remind me which BFG 158 31/7 you have? Is it a sicura jump hour or a Cordura day /date?

Joe

It is a Cordura day/date. That would be a huge help! Also, if you do have any of the jewel/spring assemblies, that would be a godsend. :)

Link to comment
Share on other sites

Hello! Sorry for the delay. Please see the attached photos. The white arrows point to the place where the springs contact to keep the date wheel and quick change mechanisms ( the two levers near the 9' hour marker)  in place. I have jewels and springs, so just let me know which ones specifically you need.

 

Regards,

JSlide1.JPG.9d9d8cbf799a381414905e1376351ba7.JPGSlide2.JPG.a2044f100f319350939cda929a838bdf.JPG

Link to comment
Share on other sites

1 hour ago, noirrac1j said:

Hello! Sorry for the delay. Please see the attached photos. The white arrows point to the place where the springs contact to keep the date wheel and quick change mechanisms ( the two levers near the 9' hour marker)  in place. I have jewels and springs, so just let me know which ones specifically you need.

 

Regards,

JSlide1.JPG.9d9d8cbf799a381414905e1376351ba7.JPGSlide2.JPG.a2044f100f319350939cda929a838bdf.JPG

You're the man! I cannot thank you enough. Finally got it together. Part of my problem is that I was poising the springs in the top bridge/cover and trying to place over the correctors/jumpers. Finally figured out that the cutaways are for slipping the springs into place.

The jewels and springs are both of the novochoc (triangle) antishock balance jewels and springs (main plate side, balance cock side). See picture.20200409_113525.thumb.jpg.0a031c28691ab3dff501dfac86fdebe9.jpg I don't think my balance staff/pivots have any problems, but if you have a balance complete, I would happily take it and compensate you fully for that. I really appreciate your help and time on this!

 

Link to comment
Share on other sites




  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • I have it, so until we get a lunch one day , nearly everyday is with my mum at the moment.
    • In the meantime whilst awaiting a better plan, please drop me a quick hello on my email. 
    • I looked at it like this, I've built a lot of stuff in my time, building structures and furniture,those are my creations and they will still be here way way after I'm gone. Traditional watchmakers felt the need to pass their knowledge on, ideas that they created . I assume with them as it is with me, leaving their mark on the earth, a way of being remembered. This creation of Mark's has brought thousands of people together to pass their knowledge around,  ideas that will continue to be used for lifetimes. Ideas that should continue to be procured. If for whatever reason the forum ceased to exist, not quite like Ranfft's, that didn't disappear but much less usable. Then that is sad, such a massive loss of communication between good people and a wealth of knowledge lost. There should be something in place for when that happens which could be next week, next year or in 10 years. Might not be a topical subject for a lot of folk or boardering on controversy, i did say i talk about stuff other people dont. But if you dont talk about it and something happens then you've lost it and you ain't gonna fix it .
    • 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. 
×
×
  • Create New...