English PW Balance staff English fusee

Frank
Based on the third photo, it appears that the staff could have only been installed from the bottom of the balance. I would remove the roller and drive out from the top of the balance down. I would also dimension the brass sleeve first, in case something really strange happens. It can then be easily remade.

Jerry Kieffer

 

Frank
I am a little late on this , but on second look, it appears that the staff has a hub that the roller is seated on. If so, it would then be difficult to support the brass sleeve when removing the staff. This can be resolved by using a staking tool roller removing accessory per attached photo. The arms can reach behind the hub and support the sleeve.

Jerry Kieffer

 

Frank
I am happy it worked out for you. It looks great.

The most unusual staff I have ever had, had a roller that was one piece to the staff itself with a triangle roller jewel in a triangle hole.

In this case, if you did not have a staff, I am assuming that you machined or cut a replacement staff. Personally, if it had ran true when chucked on the square, I may have been tempted to repivot it as it appears to have the dimensions that would support such a repair.

Jerry Kieffer

 

Frank
Micro drilling is of course another topic by itself.

In this case, I would have also machined a new staff due to its basic design. However had I repivoted it for whatever reason, it would have been done per the attached sketch.
When repivoting, I rarely Repivot the actual size of the pivot, but some what larger. I then machine down too size that assures a round straight pivot centered to the staff or whatever.

Jerry Kieffer

 

Frank
I would agree that a typical pallet arbor can be turned or machined in about the same time as repivoting. Personally, I only repivot where original strength, accuracy, appearance and function can be maintained while minimizing time and effort.

Jerry Kieffer