Hamilton 987 balance jewels

[Don Dahlberg]

I am working for the firts time on a Hamilton 987F. How does one remove the balance jewels from the balance cock? I see no screws to hold the settings. I am assuming a friction fit, but better ask first.

Don

 

[Don Dahlberg]

I am working for the firts time on a Hamilton 987F. How does one remove the balance jewels from the balance cock? I see no screws to hold the settings. I am assuming a friction fit, but better ask first.

Don

 

[John Runciman]

They are using some thing called a semi friction jeweling. The link below has the information you need for disassembling and reassembling the semi friction jeweling.


http://home.att.net/~nawcc_50/987f.PDF

 

[Don Dahlberg]

Thanks John. It is as I thought, but best to make sure.

Don

 

[Tim Theisen]

Hi all,

I find myself in the situation as Don did six years ago, and the link to a possible solution is no longer working.

Thanks,

Tim

 

[Tim Theisen]

Hi,

I am bouncing this thread in case someone now reading has an answer to how best disassemble for cleaning and oiling.

thanks,

Tim

 

[R.Murphy]

Technical Data T. D. 103 Hamilton Watch Company Semi-Friction Balance Jeweling - Vintage-Hamilton-Wristwatches

T. D. 103 Hamilton Watch Company LANCASTER,PENNSYLVANIASUBJECT: Semi-Friction Balance JewelingNOTE: This type of balance jeweling will be found in grades 986A, 987 987E, 987F, 989 and 912.Fig. 1, shows a cross-section of the movement through the center line of the balance. This drawing...

vintage-hamilton-wristwatches.com

Found this, should help.