Jump to content

Eta 2894-2

Specializedjim
 Share

Recommended Posts

Specializedjim Member

Specializedjim

Posted
Posted

Hi all. I have a broken subsidiary dial pivot (hope that’s the correct terminology) on a eta 2894-2. I realise the chronograph module is supposed to be non serviceable but my research shows that there is a Swatch group company that does sell spares for this module. Can anyone tell me who this is please. Many thanks.

 

 

Sent from my iPhone using Tapatalk

Link to comment
Share on other sites
anilv Distinguished Member

anilv

Posted
Posted

The module is manufactured and serviced by Dubois Depraz but I believe they only accept work from the dealers.. ie Omega or other brands that incorporate this module in their watches. Also they are not serviced per se , but replaced on an exchange basis.

Anyone else can confirm this?

Anilv

 

  • Like 1
Link to comment
Share on other sites
HSL Distinguished Member

HSL

Posted
Posted

Well it depends .. ETA themselves have this movement listed on their chronograph selection nowdays.
https://www.eta.ch/en/our-products/mechanical-movements/mecaline-chronographs/eta-mecaline-chronographs-2894-2
If you push the technical Communication button on the site you will find the Tech sheet for it too. 
If your movement is looking anything like the one above then getting the parts from a third part dealer I would look for them at https://www.cousinsuk.com
I attache a Picture so you can try to find the correct part.
Hope this helps you on your search..

ETA2894-2.png

  • Like 1
Link to comment
Share on other sites
jdm Distinguished Member

jdm

Posted
Posted
33 minutes ago, Specializedjim said:

Yes that’s my movement. But I don’t think the part I need is listed. Can anyone confirm the name of the part I need in the picture attached from the chronograph module of a eta 2894-2. Many thanks for your help.

As mentioned above the module is made by Dubois Depraz not ETA, unfortunately you will not get help from them, that's the standard Swiss business practice.

  • Like 1
Link to comment
Share on other sites
Specializedjim Member

Specializedjim

Posted
  • Author
Posted

Many thanks for the info. I’m a bit confused as to the manufacturer as I have been told the chronograph module is actually made by eta not Depraz. Any way that doesn’t matter I would still really like to know the correct terminology for the part that’s broken. Thanks again.


Sent from my iPhone using Tapatalk

Link to comment
Share on other sites
HSL Distinguished Member

HSL

Posted
Posted
1 hour ago, Specializedjim said:

Yes that’s my movement. But I don’t think the part I need is listed. Can anyone confirm the name of the part I need in the picture attached from the chronograph module of a eta 2894-2. Many thanks for your help.

Unfortunately JDM is partly right the chronograph module has part number 8510 and is only sold as what ETA calls an "integrated part".
You have to be authorized by ETA to buy it from them but even then it comes with an hefty prize.
At Cousine you will find it as a "Restricted" part.

I think the best chance is to buy one "Second hand" but there isn´t any parts for it out there.

Used module:
https://www.hhcdsjstore.com/index.php?main_page=product_info&products_id=486718

New:
Cousineuk Chronograph Module Assembled, Height 1 ( 8510 ), ETA 2894.2 ETA289428510 (Restricted)
https://www.boley.de/caliber/watchmovements/eta/4873
http://www.startimesupply.com/merchant2/merchant.mvc?Screen=PROD&Store_Code=1&Category_Code=1H-Parts-Movt-IntParts-ETA-07&Product_Code=ETA2894-8510-H1

And a tech sheet with the correct partnumbers for everything except the chronograph module.
 

2894-2_Tech_Com.pdf

  • Like 1
Link to comment
Share on other sites
Specializedjim Member

Specializedjim

Posted
  • Author
Posted

Thanks everyone for the great input.

I have now been able to disassemble the Chrono module, remove the broken item and after about twenty attempts learning a little more every time, put the module back together and it works!!

So if I can’t get a new part the next question is, is there a standard repair procedure for repairing a broken shaft/spindle in a part like this (please see picture). I am a experienced engineer and have access to all types of machine tools thanks to my job. But before I start trying to reinvent the wheel I wondered if there is a proven method.

Thanks again for all the help.

0f16c1a9ec10c2aee81fe2a386d6351e.jpg





Sent from my iPhone using Tapatalk

Link to comment
Share on other sites
jdm Distinguished Member

jdm

Posted
Posted

If I understand right it's a snapped pivot, an experienced watchmaker would cut a new one on a watch maker's lathe and install it with a staking tool.

A general machine shop wouldn't be able to make a part that small. 

FYI it's normal with the Swiss watch industry that one can't easily understand who does what. It's a thick web of contract work, patents and agreements made to their exclusive benefit. It has been like that since more than 200 years. 

Link to comment
Share on other sites
anilv Distinguished Member

anilv

Posted
Posted

With these DD modules you need to dismantle with the chrono in the 'running' position to avoid parts flying off.

But you've probably figured that out already! I serviced mine when I had one .. more to see how it was constructed but after getting it back together I swore I'd never service (or buy) another.

Anilv

Link to comment
Share on other sites
Specializedjim Member

Specializedjim

Posted
  • Author
Posted
If I understand right it's a snapped pivot, an experienced watchmaker would cut a new one on a watch maker's lathe and install it with a staking tool.
A general machine shop wouldn't be able to make a part that small. 
FYI it's normal with the Swiss watch industry that one can't easily understand who does what. It's a thick web of contract work, patents and agreements made to their exclusive benefit. It has been like that since more than 200 years. 


Many thanks that’s what I thought would be the method.

I work for a very large Japanese cutting tool manufacturer and we produce tools down to 0.1mm. Because of this I also have customers who have equipment to work this small so the size of the repair isn’t an issue. I may even manufacture a new part complete if I can’t simply purchase a new one.

Again many thanks again for the information.


Sent from my iPhone using Tapatalk
Link to comment
Share on other sites
jdm Distinguished Member

jdm

Posted
Posted
2 minutes ago, Specializedjim said:

I work for a very large Japanese cutting tool manufacturer and we produce tools down to 0.1mm. Because of this I also have customers who have equipment to work this small so the size of the repair isn’t an issue. I may even manufacture a new part complete if I can’t simply purchase a new one.

 

You also have to measure the jewel hole to a precision of at least 0.01mm for the new pivot. It could also be made as an extension fitted on the existing body.

  • Like 1
Link to comment
Share on other sites
 Share
Go to topic listing


  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • Neverenoughwatches
      Without Our Forum

      By Neverenoughwatches · Posted

      Its 4 o'clock in the morning here in the Uk, i cant sleep, i dont sleep, not much ever really. My brain never shuts off to rest, I'm just a constant thinker, i have to be very tired to be able to sleep,  i guess eventually it will be my undoing and my health will suffer because of it I'm sure. But while I'm here i want to get as much out of life as i can, and give as much as i can, to help,maybe to make a difference to someone's life if that is within my capability,recent events have made that need even more clear to me. I'm not sure where I'm going with this or why i bring it up , or if its relevant to want i want to talk about its just in my head right now. What i do want to talk about is something thats been on my mind for ages. I like to be prepared,  I'm not fond of surprises because surprises take control away and i am a bit of a control freak at times. This forum, Our Forum if i can call it that, is here because of two reasons. The guy that created it and keeps it funded and the people that joined it.  Without either, it would not exist, and lets face it one day it won't ( I'm a realist and i talk about things others dont or who are afraid to in other words folk that dont particularly prepare for the inevitable). How many of us visit here regularly ?  How many among us almost depend on the forum as a way of socialising because they are stuck at home and how many of us has it become part of a daily routine to check in and see if they can offer advice or get help with something they are working on or just to have a chat and engage in some banter. The members here are in the thousands and thousands have disappeared over the years many had just a fleeting visit. But there are a good few of us that know each other quite well and visit regularly. I dont know about you but i wouldnt want to lose that communication with you all, in all honesty it has become an important part of that side of my life and helps to feed my passion for all things watches. Some of you may think differently and thats ok, some of may stop and think # what would i do " Without Our Forum " # 
    • Neverenoughwatches
      Gamblin Gamsol for cleaning?

      By Neverenoughwatches · Posted

      Naptha appears to be a general name and its content can be varied depending upon what it's specific use is. Lighter fluid as an example can be light or heavier also with other ingredients to help it burn. Try sesrching for benzine ( as opposed to benzene which is linked to causing health issues ) . There are other fluids such as ethanol that you could try and also methylated sprirts, mostly ethanol with a small percentage of methanol added. Experiment with any new chemical to see how quickly schellac dissolves in its presence. I have tried a few things but hexane is not one of them, i understand it does evaporate very quickly.  Be sure sure to check out any safety data on chemicals you try. Toxicity of fumes and flash point information, ultrasonic machines can heat up fluids even without a heater function. And of course always ask here for personal opinions when trying a new substance. 
    • GuyMontag
      What tools does ebay have to offer this week.

      By GuyMontag · Posted

      I have that set and really like it. I prefer that crystal holder over the one that came with my Bergeon claw tool and any time I use the claw I use this one instead of the Bergeon one, just an additional bonus with this tool.
    • GuyMontag
      Movement inserted from crytal side

      By GuyMontag · Posted

      Is the Roamer not a split stem? I'm confused on your how your case is put together. If it is a front loader where is it you are putting the case screws? I love me some Roamer, do you have any photos?
    • ManSkirtBrew
      1972 Bulova President "E" Sea King 11ACACB movement

      By ManSkirtBrew · Posted

      Oh nice. I have a similar wedge style stump for my staking tool, so I'll give that a shot. Thanks!
×
×
  • Create New...