Omega 860 Pallet Fork Arbor

W Watchfixr

Is the pallet fork arbor threaded or pressed in? The top pivot broke when I applied power to the train. Apparently it was weak although it exhibited no signs of wear. None of my suppliers have a new fork but some have the arbor. Advice on removing the old one is greatly appreciated.

Thanks,
Marty

W Watchfixr

I guess I revealed my age. When I started in this trade over 50 years ago, there was an abundance of 18S pocket watches needing service. Many had the balance cock on the plate with the roller in a well. The escapement lever came in through a slot cut into the side of the well. To prevent breaking the pivot on the lever, it was necessary to invert the watch for disassembly. After carefully separating the plates a wee bit, one could lift the lever pivots clear of their locations. Of course any attempt to lift the train plate off the pillar plate in the normal fashion almost always resulted in re-pivoting the lever. As a result, many of the lever pivots were threaded to accommodate rapid replacement. Thus the reason for my question.

.Thanks for the responses.