Jump to content

The dreaded 3 pronged Russian shock spring


Recommended Posts

Recently there were several rants about the dreaded 3 pronged Russian shock spring.

20221121_214601.thumb.jpg.8061b2b27eeb27047b5f81597eec06b3.jpg

I have done quite a number of Russian movements but never had much problem with the shock springs until a couple of days ago. This Slava 2427 had the most uncooperative shock springs that I have ever come across. Just cleaning and oiling the two balance jewels took me almost an hour.

I think it was a combination of a stiff shock spring and badly polished shock spring seats. I could get 2 prongs in but after that, the friction was so great that it became impossible to turn the last prong after it was pressed into the notch.

It was then that I decided to make a tool to fit the shock spring in. My mentor described how to make this tool to me several years but I never made one as I never had much problems with shock springs before.

It is rather simple. The tube was taken from an old spring bar and expanded slightly to fit the hole in the shock spring seat. Three shallow notches were made in the rim of the tube to catch the 3 prongs of the shock spring. The notches must be shallow, so that the tube can depress the prongs.

20221121_214913.thumb.jpg.6856f46d7155866352e1400847894df7.jpg

It only took me 15 minutes to make the tool and using it to fit the shock spring is a real godsend.

20221121_214955.thumb.jpg.9af65660a523dbfbb25f720bc41d0b89.jpg

If any of our members have problems refitting these 3 pronged springs, I strongly advise making this tool.

  • Like 6
Link to comment
Share on other sites

27 minutes ago, HectorLooi said:

Recently there were several rants about the dreaded 3 pronged Russian shock spring.

20221121_214601.thumb.jpg.8061b2b27eeb27047b5f81597eec06b3.jpg

I have done quite a number of Russian movements but never had much problem with the shock springs until a couple of days ago. This Slava 2427 had the most uncooperative shock springs that I have ever come across. Just cleaning and oiling the two balance jewels took me almost an hour.

I think it was a combination of a stiff shock spring and badly polished shock spring seats. I could get 2 prongs in but after that, the friction was so great that it became impossible to turn the last prong after it was pressed into the notch.

It was then that I decided to make a tool to fit the shock spring in. My mentor described how to make this tool to me several years but I never made one as I never had much problems with shock springs before.

It is rather simple. The tube was taken from an old spring bar and expanded slightly to fit the hole in the shock spring seat. Three shallow notches were made in the rim of the tube to catch the 3 prongs of the shock spring. The notches must be shallow, so that the tube can depress the prongs.

20221121_214913.thumb.jpg.6856f46d7155866352e1400847894df7.jpg

It only took me 15 minutes to make the tool and using it to fit the shock spring is a real godsend.

20221121_214955.thumb.jpg.9af65660a523dbfbb25f720bc41d0b89.jpg

If any of our members have problems refitting these 3 pronged springs, I strongly advise making this tool.

Nice one HectorLooi, pegwood also works well. Try this 3 pronged kif  mounted on 3 notched setting on a small 6 3/4 x 8  Oris. I wont be doing this again anytime soon. 😒

1669044190683240641324739147410.jpg

16690443050665525630459270554433.jpg

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.

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



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • Thankyou for that, I did have a PDF for the movement but not as detailed as this one, thanks again Scott..
    • No - not the watchmaster. The tanks are standalone - you manually move from US Wash to pre-rinse to US-Rinse. After the US Rinse I manually shake the basket to release some fluid and then it goes to the dryer, which does spin and heat (but the drips go into the machine). I guess my question is really around the heating temp (is 70°C reasonable) - I agree the Elmadry is expensive but I can likely find something much cheaper. Also in terms of productivity and consistency I'm trying to avoid the manual blowdrying method (although I agree it would work). I have a workflow that I try to stick to - and I have tasks that I like to do while the dryer is running...
    • After a bit of the Parrot Sketch with Cousins website the GS recommended 1.60 x 0.135 x 660 x 14.5 size appears in my shopping cart. I figured Cousins of all should have parts for these Smiths and of course they have many of them once I found where to look... Three days to the US, then assembly.  I shall update the results...
    • Not sure the following will help you @signcarverbut I made the following note in my book where I record my experiences and thoughts in watch repair. Replacing the arbor. Insert the arbor so that the arbor hook goes in where the innermost coil has its widest section (between the innermost and second innermost coil) to facilitate getting the arbor inside the innermost coil. Then, using brass tweezers, rotate the arbor so that the arbor hook goes into the eye of the innermost coil. I also made the following "ugly" illustration. With some movements, it's a very tight fit, for example, Vostok movements. Hope it helps!
    • Thanks for the replies guys, I think you are both right in what you say, I suppose the brand name on the front of the watch really doesn't have anything to do with what is going on inside. I did find quite a bit of information and background on the movement manufacturer which is actually quite fascinating so I will settle with that knowledge and move on to the next one I think. Thanks!
×
×
  • Create New...