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ETA 2892 A2 Main Plate Jewels

gibsonk
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gibsonk Member

gibsonk

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I have been experiencing issues with my 2892 a2, i have a damaged Jewel in the main plate, the jewel for the third wheel is cracked, unfortunately i have little or no power though the drive train and shocking amplitude (108) 

I have had a look around but cant seem to find where to source a new jewel, are they available or am i looking at a new main plate ? 

 

Many thanks in advance  

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gibsonk Member

gibsonk

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14 hours ago, sstakoff said:

Do you have the appropriate equipment (jeweling set) to push the old jewel out and fit the new jewel?

Hi Unfortunately i do not, i assume they cannot just be pushed out and pooped back in, is this a alignment concern. 

 

Luckily i have found a 2892 a2 main plate as a temp fix, the damaged one is form a Omega 2200 and i really want the original main plate in use and not a generic 2892

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sstakoff WRT Addict

sstakoff

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36 minutes ago, gibsonk said:

Hi Unfortunately i do not, i assume they cannot just be pushed out and pooped back in, is this a alignment concern. 

 

Luckily i have found a 2892 a2 main plate as a temp fix, the damaged one is form a Omega 2200 and i really want the original main plate in use and not a generic 2892

Hmmm. Interested to see what others say - but I think you're in a bit of a pickle. You can certainly push the old jewel out. They are just friction fit - assuming you don't have a bezel set jewel, or one that is mounted in a "chaton". You can check google for images. But, assuming the jewel is friction fit right into the plate you can simply push it out. The tough part is pressing the new one in. A jeweling tool allows you to do so such that the jewel is perfectly flat and it also allows precise control over the depth of press which controls the endshake. I think you'll have a tough time getting it adjusted sufficiently without a tool. I suppose you could make do with a normal staking set - but you may end up cracking the new jewel if you use a standard punch rather than one meant specifically for jewels.

Another risk is that you find the hole in the plate is damaged - not perfectly round. In this case you would need to ream a new (larger) hole and insert a similarly larger jewel. The reamers are paired with appropriate "pushers" in a jeweling set.

Check out these videos for the full procedure:

 

 

 

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gibsonk Member

gibsonk

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Thanks guys, i will look over these, i may need to take it to a local watch smith to get the jewel fit properly; given the new swatch supply chain rules i don't want to damage a plate i may not be able to replace 

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