a locking ring for the back of a watch 1

[loughnane]

Does anyone know where I can buy a locking ring similar to the one shown at ~1:20 in this video...

http://youtu.be/M_dq-Ak-Suw?t=1m22s?

Alternatively, how would you guess this is manufactured? Forged then machined?

Chris Loughnane - Product Design

http://www.pdnotebook.com

http://www.twitter.com/_chrisloughnane

 

[fegenbush]

Order of machining operations:
Start with faced round bar.
Turn OD
Bore ID
Thread ID
Cut Grooves
Part off or use Slitting Saw

I don't know why this would be preferable to threading the back with grooves as one piece like many watchmakers do.

 

[Timelord]

Bearing lock nuts are very similar, but much heavier and stronger. Perhaps you can machine one down to get what you need. Check some out at Link

Timelord

 

[MikeHalloran]

In this case, the OD is threaded and the ID has wrenching notches.
Because the threads are super-fine, it would be best to cut them in the same setup with the facing operation, then bore an ID, mill the wrenching notches, and then cut off the part.

The watch mfgr probably does it all in one setup in one CNC turn/mill bar machine.



Mike Halloran
Pembroke Pines, FL, USA

 

[Artisi]

As for buying, assume you have tried a few watch makers/ repairers, otherwise a good job for an apprentice watchmaker.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)