Incabloc End Shake Adjustment?

[Jbeck]

Hi, I'm wondering how to adjust endshake on an incabloc balance setting, or if its possible. All the drawings I have seen look like the end shake is held by the end stones. Is the only fix for excessive endshake a new staff?

 

What I have in for repair is a Cartier 191 which I believe is a GP 3100 movement. 28800bph. Also can anyone verify that a GP31 balance is the same as the Cartier? i dont have any cross reference info for the Cartier.

 

 

[matabog]

I may be out of my league but if nothing works, why don't you try pushing the entire antishoc further into the bridge, if possible. You would reduce the end-to-end space between the two cap-jewels.

[Jbeck]

Its a thought. Most of the settings Ive seen bottom out from the interior. I was about to post and ask if it was a bogus question. It seems like there should be a reliable way to set each jewel similar to friction jewels in the case you need impulse adjustment. I may just tear into an old movement and see what gives. Still all ears though.

[Geo]

Is it possible that one or both of the jewels have not been seated into the jewel holder/carrier properly? If this was the case you may be able to seat then with gentle pressure using a jewel press.

If they are seated properly, you could very carefully reduce the length of one of the holders/carriers using a lathe to allow it to seat deeper in thus reducing the end shake.

Just a thought! :-)

[Maurice]

I think the lower bloc holder is cylindrical and pressure fitted in the plate, If so it should be adjustable!?

[Jbeck]

Yea, I'm gonna check all these ideas, I was hoping for someone to chime in who has done it.