Replacing Incabloc Spring That Broke Off

[GeorgeClarkson]

AS per title, while reassembling a movement (ETA 2892-a2) the incablock spring that is on the main plate broke off in 2 parts, so now I need to replace it. How can I do it without removing the jewel holder from the plate?

[bobm12]

I believe you need a replacement incablok spring (at least this is normal procedure as a replacement for the ETA 2824 et al, I'm not familiar with the very finicky-to-work-on -- according to others -- ETA 2892-a2). If you were on this side of world, I would say ofrei stocks them...but his prices for shipping outside USA are too high for a US$2 part. It is a pain sometimes to make those springs to catch on the end they are supposed to and finally close correctly (lyre type) the others (novodiac/kif) will get in with no problem...except when they want to jump and join the space junk orbiting the Earth.

[GeorgeClarkson]

You are right, I need a replacement Lyra-Spring and from Orfei it will be too expensive, and will take too much time. I found in France a complete movement to overhaul, it is quite expensive, but at least I could just replace the mainplate.... Any other suggestions?

[GeorgeClarkson]

I do have some spare movements that I can take the spring off (the movements are not worthy a repair anyway) but I noticed that they are too big...

[bobm12]

Try cousinsUK for the spring...no need to pay for a whole watch...better to have 3 of each size just in case...IMHO.

[rogart63]

It usually easier to remove the holder then to wiggle the incabloc spring  in and brake it again . Just pay attention to how far it's pressed in . And in what direction . Sometimes the date ring slides very close to the jewel . And there for has a cutout. 

Edited November 21, 2015 by rogart63

[GeorgeClarkson]

Try cousinsUK for the spring...no need to pay for a whole watch...better to have 3 of each size just in case...IMHO.

 

Would this do for me? I actually have no idea which incablock to  get...

 

https://www.cousinsuk.com/product/inca-assortment?code=I38848

 

Or better: which of these?

 

https://www.cousinsuk.com/product/inca-shock-springs?code=incabloc%20springs

Edited November 21, 2015 by GeorgeClarkson

[bobm12]

Sorry George,

 

I couldn't find a good reference for the right part, the service data doesn't list if I think, only as a full assembly if I'm not mistaken...if money is no object I would get the full set of springs from your links. That way I'll know which one to use for every watch I'll ever service...hopefully some one more knowledgeable on this movement can advise both of us.

 

Cheers,

 

Bob

[GeorgeClarkson]

Bob, I was thinking the same, but I found a watchmaker here on Germany who can replace the spring if I send the main plate to him. I do not have a staking tool, so even if I buy the spring I won't be able to install it. It would cost me some 50€ plus the cost of the spring, so we are There with the price. But I would be sure that the job is done correctly...

[GuiBer]

Hi George, I am not sure I understood exactly what your problem is, but in Cousins downloads I found this :

 

See last page where it is ETA 2892 "family".

1252_Incabloc By Factory - Eta.pdf

Edited November 21, 2015 by GuiBer

[bobm12]

Excellent find GuiBer,

 

Thank you! One more piece of information for my modest watch "info" folder. I usually wing it trying different sizes. This takes the guess work out of the equation!

 

@George: George, maybe I'm not understanding well but for the spring I believe you don't need a staking tool. They just "attach" hopefully by inserting on end with your tweezers. Then, the two lyre ends are moved into position with the same tweezers. The first move is tricky but no staking. In my mind, and with a lot of imagination, it is the same principle as those battery lids we see in remote controls for tv: you have to attach one end so the other end can latch...and it comes with -- usually -- to plastic guides (or ears If you would).

 

Well, in this case, the back of the lyre has this particular shape that will fit the frame where it belongs. Usually you kind of push it at a steep angle and once it clicks in place it will act like a hinge, allowing you to close it over the cap jewel and eventually securing both ends of the lyre in their respective "grooves". I can't explain it right, words are not enough but hopefully you get the idea.

 

Or maybe I'm confused and it is different to other ETA's....

 

Maybe you can try first and if it doesn't work you can send it to your friend the watchmaker...but where is the fun if you don't try first! :)

 

Cheers,

 

Bob

[GeorgeClarkson]

@Guiber: yes I had found that link too, but don't really understand how to read it...

@Bob: I tried exactly what you said, but without breaking the spring completely apart there is no way I can remove it. And the problem is when I would try to put the new one: even twisting it will not come in. Since the incabloc is embedded in the mainplate there is no other way, I believe, that the spring will come on...

[GeorgeClarkson]

Hi George, I am not sure I understood exactly what your problem is, but in Cousins downloads I found this :

See last page where it is ETA 2892 "family".

Am I right in thinking the size is 170.03?

[rogart63]

Am I right in thinking the size is 170.03?

170.03 is the incabloc spring . 

[GeorgeClarkson]

170.03 is the incabloc spring .

So is that the correct one?

[GuiBer]

170.03 is the incabloc spring . 

I supose that as the jewell in question is in the main plate, that corresponds to the bottom ("dessous" in french) of the movement, and so the spring should be the 173.03.

 

(Perhaps someone more experienced than me in this subject can confirm it ?) 

 

George, in the doubt you can always order the two types, as they are not so expensive!

Edited November 22, 2015 by GuiBer

[GeorgeClarkson]

GuiBer I already decided to send the mainplate to the watchmaker... I don't have a staking tool and I do not want to try and damage further the movement.

[GeorgeClarkson]

But in the end I also decided to search for a staking tool...

[cdjswiss]

Here is a howto from the NAWCC forum. You do need a staking tool.

 

To replace incabloc springs--push the setting out of the cock or plate. Place spring in channel, (self explanatory when you get this far)
put jewel in place and lock down the spring.
reinsert the setting. Easier than it sounds.
You will need a jeweling tool or at least a good staking tool to do this properly.

 

Under  'Watch parts branded' Cousins lists the springs for ETA 2892-A2 at £2.95 per pack of 5. You need to be registered (no hassle).

Edited November 22, 2015 by cdjswiss

[GuiBer]

GuiBer I already decided to send the mainplate to the watchmaker... I don't have a staking tool and I do not want to try and damage further the movement.

I think you make the right decision as you don't have the proper tool to do the job!

 

So it's also good you have decided to get a staking/jewelling tool !

 

I mentioned the two because there are some works with jewels that I suppose cannot be made with a stacking tool.

[bobm12]

 

I mentioned the two because there are some works with jewels that I suppose cannot be made with a stacking tool.

Absolutely correct unless your stacking tool has the jeweling add on...like some K&D models.

[GeorgeClarkson]

Here is a howto from the NAWCC forum. You do need a staking tool

To replace incabloc springs--push the setting out of the cock or plate. Place spring in channel, (self explanatory when you get this far)

put jewel in place and lock down the spring.

reinsert the setting. Easier than it sounds.

You will need a jeweling tool or at least a good staking tool to do this properly.

Under 'Watch parts branded' Cousins lists the springs for ETA 2892-A2 at £2.95 per pack of 5. You need to be registered (no hassle).

I had found that thread too, hence my decision to send it to a watchmaker

Edited November 22, 2015 by GeorgeClarkson

[GeorgeClarkson]

Speaking of staking tools I just found this:141829717753 (ebay art. Number)

Can someone tell me if iI need to look for something like this?

[Geo]

I wouldn't be without mine. It's the one if these things that you don't use often, but they are very useful. That's a pretty good price, and even better if yo get up for a lower offer.

[bobm12]

Hi George,

 

I'm actually partial to theK & D 18R Inverto Deluxe Staking & Jeweling Tool Set , something like this:

 

 

They are a little more money but I believe they are well worth the extra expense. Of course, the Favorite would be another candidate but they are still more expensive and rare to find.

 

Cheers,

 

Bob