Omega 30T2 1240

[Kepas]

Hi everyone,

I would appreciate some help with this third wheel from an Omega 30T2. I bought a non-working watch and the only part damage was the wheel on the left, terrible shape with a missing teeth. I bought a replacement from ebay, and although similar there are small differences in the central pinion that doesn´t allow the central wheel to move freely.

Any help on how to fix this or to buy the correct one it will be greatly appreciated.

[jdm]

10 hours ago, Kepas said:

although similar there are small differences in the central pinion that doesn´t allow the central wheel to move freely.

The original pinion can be carried to the new wheel using a staking set. That is a somewhat delicate operation, you need to very that the wheel is square to the axis of the pinion.

[clockboy]

Is it the height or pivot that is different. As JDM says a delicate operation indeed. If it’s just the pivot that is tight then changing the jewel to fit the pinion is an option, if you have a lathe or a Jacot Pivoting Tool reduce the pivot to fit. If it is the height then as JDM says fit the original pivot to the new wheel or can the jewel be moved this would have to be done with a jeweling tool. 

[praezis]

Old pinion has 8 leaves, new one has 9! How can that work? 

Before you do anything: count the teeth number of both wheels and compare! Diameter, too.

Frank

[clockboy]

39 minutes ago, praezis said:

Old pinion has 8 leaves, new one has 9! How can that work? 

Before you do anything: count the teeth number of both wheels and compare! Diameter, too.

Frank

Good spot Frank. The only option is to fit the original pinion to the new wheel.

[Kepas]

Hi, Thanks to all for the comments and advice.

4 hours ago, praezis said:

Old pinion has 8 leaves, new one has 9! How can that work? 

Before you do anything: count the teeth number of both wheels and compare! Diameter, too.

Frank

Good point Frank, from now on, I´ll put more attention to that. I noted that the pinions teeth were thinner and a little bit longer, but it didn’t occur to me to count the teeth. I guess I’m just a swapper… : )

7 hours ago, clockboy said:

Is it the height or pivot that is different. As JDM says a delicate operation indeed. If it’s just the pivot that is tight then changing the jewel to fit the pinion is an option, if you have a lathe or a Jacot Pivoting Tool reduce the pivot to fit. If it is the height then as JDM says fit the original pivot to the new wheel or can the jewel be moved this would have to be done with a jeweling tool. 

I think the pivots are ok, since the train of wheel spins fine down the third wheel, with the second and escape wheels on the bridge.

 

7 hours ago, jdm said:

The original pinion can be carried to the new wheel using a staking set. That is a somewhat delicate operation, you need to very that the wheel is square to the axis of the pinion.

I guess I must go that route. I do have some stacking tools but only a few punches, so any advice on how to proceed from here it will be greatly appreciated. I haven´t seen any video on YT on this, in case someone could post one.

Thanks for all the advice.....

 

 

[rodabod]

The tooth modulus is different. 
 

Are you sure this isn’t from a later 26x or 28x caliber? 

[Kepas]

On 1/21/2022 at 11:18 PM, rodabod said:

The tooth modulus is different. 
 

Are you sure this isn’t from a later 26x or 28x caliber? 

No idea... It was sold to me as a 30T2 wheels, but my experience with classic Omegas movements is very limited. I hope someone could help on this.