Jump to content

Movement case rings (for ETA) - where do you find them ?

mikepilk

By mikepilk
in Watch Repairs Help & Advice

 Share

Recommended Posts

mikepilk Distinguished Member

mikepilk

Posted
Posted (edited)

I found a nice NOS case (stamped with '2789 0567 360') for an ETA 2789 movement I have. 

Great - just drop it in, and a smart new watch. 

Problem is, the movement case ring is too wide to fit the case.  So my question is -

Anyone know a good supplier of movement case rings  - or is it just ebay ?

There are a few on ebay which look suitable - the 2789 is the same diameter as 2824, 36 etc.

 

The existing ring is quite chunky - I only need to lose 0.6 mm to make it fit. I'm going to see if I can fix it to a drill somehow 

and use a file on it  ? (whilst wearing goggles)

20210209_144312.thumb.jpg.ad375b3706a8ff66157db611b32ca6ff.jpg

20210209_145645.thumb.jpg.99180015d5e44ce4712b42bf3bdb418b.jpg

 

Edited by mikepilk
Link to comment
Share on other sites
  • mikepilk changed the title to Movement case rings (for ETA) - where do you find them ?
LittleWatchShop Distinguished Member

LittleWatchShop

Posted
Posted
20 minutes ago, mikepilk said:

Inner dia 25.6 mm, outer 28.5 mm. Height about 2.5 mm

These kinds of things are certainly possible using 3D printing.  I just threw this together as an example.  Can be far more complex lines if needed.  Lots of 3D print shops around that will print your stl file too.  You don't even need to invest in the printer.  Just an idea.

2021-02-09 13_42_32-FreeCAD 0.18.png

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

mikepilk

Posted
  • Author
Posted
18 minutes ago, LittleWatchShop said:

These kinds of things are certainly possible using 3D printing.  I just threw this together as an example.  Can be far more complex lines if needed.  Lots of 3D print shops around that will print your stl file too.  You don't even need to invest in the printer.  Just an idea.

2021-02-09 13_42_32-FreeCAD 0.18.png

I thought the same, and have been browsing 3D printers on Amazon this afternoon !

I've no experience of 3D printing - but was considering something like this 

https://www.amazon.co.uk/gp/product/B08DR3WCV5?pf_rd_r=EAGSGGBV9W97H6V5B3NS&pf_rd_p=6e878984-68d5-4fd2-b7b3-7bc79d9c8b60&pd_rd_r=8d24a0b5-2ebb-484f-8e1d-0c716f116a7f&pd_rd_w=Keueh&pd_rd_wg=wx3l9&ref_=pd_gw_unk

Link to comment
Share on other sites
LittleWatchShop Distinguished Member

LittleWatchShop

Posted
Posted
8 minutes ago, mikepilk said:

I thought the same, and have been browsing 3D printers on Amazon this afternoon !

I've no experience of 3D printing - but was considering something like this 

https://www.amazon.co.uk/gp/product/B08DR3WCV5?pf_rd_r=EAGSGGBV9W97H6V5B3NS&pf_rd_p=6e878984-68d5-4fd2-b7b3-7bc79d9c8b60&pd_rd_r=8d24a0b5-2ebb-484f-8e1d-0c716f116a7f&pd_rd_w=Keueh&pd_rd_wg=wx3l9&ref_=pd_gw_unk

My experience is only with FDM style 3D printing (where you feed a filament into a nozzle and it is melted and added to the whatever is below it.)  SLA printers start with a liquid polymer that is selectively cured as the image is pulled from the liquid.  I hear that SLA printers are more accurate.

I have been 3D printing for about three years and I wonder how I ever lived without it.  Super utilitarian.

The software I use is open source, so there are no costs or licensing issues.

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

LittleWatchShop

Posted
Posted
28 minutes ago, mikepilk said:

I'm tempted to get one - I'll do some more research first

I have a Lulzbot Mini.  The 3D community is really high on the Prusa which is sourced from Europe.  If I were to buy one today, I would start my research with the Prusa.  I like my Lulzbot a lot, but it is becoming a bit dated in terms of capability.

I have printed battery inserts for my Wittnauer Electrochron, custom boxes for my electronics, stand to hold a pocket watch, replacement handles for my oilers (my dad would put the broken ones in a drawer and buy new ones), custom threaded bulkhead for my water collection system, on and on.  When I bought it, I had no idea how I would use it other than for custom boxes for my electronics.

  • Thanks 1
Link to comment
Share on other sites
Nucejoe Distinguished Member

Nucejoe

Posted
Posted

https://www.ebay.ca/itm/Vintage-Military-WEST-END-WATCH-CO-PRIMA-Automatic-MOVEMENT-SS-WATCHES-R2/224194467209?hash=item3433081589:g:6ocAAOSw8GFfh1Vf&redirect=mobile

Hi Mike. I hope this link would open on your device, it shows a kind of movement ring integrated with dust cover, I got a dozen of them and would need a day to check OD on them for one that fits in the case you have bought. It would be one made to house eta 2789 .

Joe

Link to comment
Share on other sites
Nucejoe Distinguished Member

Nucejoe

Posted
Posted
26 minutes ago, Nucejoe said:

https://www.ebay.ca/itm/Vintage-Military-WEST-END-WATCH-CO-PRIMA-Automatic-MOVEMENT-SS-WATCHES-R2/224194467209?hash=item3433081589:g:6ocAAOSw8GFfh1Vf&redirect=mobile

Hi Mike. I hope this link would open on your device, it shows a kind of movement ring integrated with dust cover, I got a dozen of them and would need a day to check OD on them for one that fits in the case you have bought. It would be one made to house eta 2789 .

Joe

Forgot to mention that my tablet did not open the links in your post, I need to see the case  and  its back plate.

Link to comment
Share on other sites
Nucejoe Distinguished Member

Nucejoe

Posted
Posted
On 2/10/2021 at 11:49 AM, mikepilk said:

I couldn't get the images loaded yesterday - it's worked now

Hi Mike,  The movement itself is 5.9 mm thick, dust cove would add about 1.5 to that, so you need like 7.4 mm depth inside the case, Not all brands use dust cover. I think I can tell if you case accomodates a dust cover if I see its inside and the back plate.

 

 

Link to comment
Share on other sites
mikepilk Distinguished Member

mikepilk

Posted
  • Author
Posted
2 minutes ago, Nucejoe said:

Hi Mike,  The movement itself is 5.9 mm thick, dust cove would add about 1.5 to that, so you need like 7.4 mm depth inside the case, Not all brands use dust cover. I think I can tell if you case accomodates a dust cover if I see its inside and the back plate.

 

 

Hi @Nucejoe. I solved the problem. I pushed the ring on to a felt cone polisher on my electric drill. With the drill clamped to the desk, I used a fine file to take the ring diameter down until it fit. ( I wish I had a lathe)

The only problem then was about a 0.5 mm gap between the dial and the inside of the case. Fortunately I found a thin gold tension ring from a glass which fitted perfectly. 

As @LittleWatchShop suggests, a 3D printer would be good for making this sort of part.

20210211_101009.thumb.jpg.7c9e51f7a8cafe45575c75ffabf3c64f.jpg 

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


  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • Bonefixer
      AS2063 - hand setting

      By Bonefixer · Posted

      Thanks everyone for your helpful replies. I think between us we’ve worked out what’s going on. Next job is to have a proper look at this great wheel assembly, see if I can remove the clip and the friction fit pinion, give the bits a good clean, then put it back together with a bit of blue grease. I’ll also get the pallet fork under the microscope to see if it’s ok or been damaged. 
    • Mercurial
      AS2063 - hand setting

      By Mercurial · Posted

      The cannon pinion (be it conventional style or what you see in this movement) should slip on its arbour so the hands can be set independently without affecting the gear train.  If there is too much friction between the cannon pinion and the second wheel, turning the hands to set them backwards can sometimes force the escape wheel teeth to overrun the pallet stones, creating the behaviour you describe. The train is running in reverse when this happens.  This can often chip the pallet stones. I’d say at least half of the watches I’ve inspected with very tight cannon pinions had chipped pallet stones. Hopefully this isn’t the case with your watch.  I’m not familiar with this movement but you need to get the friction in the cannon pinion adjusted correctly.  Hope this helps, Mark
    • Bonefixer
      AS2063 - hand setting

      By Bonefixer · Posted

      Pallet fork was in. I’d had the movement running ok, and only removed the balance to flip it over and install the keyless works and date mechanism. The pallet fork wasn’t locking the gear train when hand setting - it was oscillating as the escape wheel rotated. This may have been in one direction only - can’t remember. 
    • watchweasol
      Stem broken - can it be rescued?

      By watchweasol · Posted

      Hi   Find attached parts/repair notes for the JLC 911,  might be useful. JLC_JLC 910, 911.pdf JLC_JLC 910, 911 Repair Notes.pdf
    • watchweasol
      Intro

      By watchweasol · Posted

      Hello and welcome to the forum Dan. Used to know Middlesboro quite well, that was twenty years plus ago. Attached a little reading to get you started. TZIllustratedGlossary.pdf
×
×
  • Create New...