Internet Horology Club 185
Making Small Parts

This topic can be found at:
https://ihc185.infopop.cc/eve/forums/a/tpc/f/1086047761/m/4063978677

January 26, 2013, 18:36
Roger J. Nolfe
Making Small Parts
Sometimes a part just isn't available and the only choice left is to make it. This rare Rockford wind indicator had a broken pallet pivot. Unable to locate the part, it had to be made. Fortunately the arbor is pressed into the pallet and not screwed in like many are. Sometimes you can re-pivot. The first picture shows a hole drilled into the end of the existing arbor.


January 26, 2013, 18:37
Roger J. Nolfe
This picture shows the drilled arbor next to the pallet.


January 26, 2013, 18:41
Roger J. Nolfe
There really wasn't enough shoulder left to fit a new pivot comfortably and the work involved would have been as much as making a new arbor. Using the old arbor for a model, the new part begins. Pivot diameter is .11mm or approx. .004" same as a typical balance staff. It was intentionally left long.


January 26, 2013, 18:48
Roger J. Nolfe
Progress is made turning the shoulder.


January 26, 2013, 18:52
Roger J. Nolfe
Finally part is complete except for final fit. The part is polished to a mirror finish but the picture doesn't show that well.


January 26, 2013, 18:57
Roger J. Nolfe
There is more involved here, including selecting the right material and gravers to do the job right. There are cap jewels on the pallet so end shake was especially critical. I was able to turn the pivots to make a perfect fit in the hole jewels. In the end, a part indistinguishable from a factory original was made and installed making a rare watch live again.
January 26, 2013, 19:02
Gary E. Cochran
Nice work...
January 26, 2013, 19:37
Peter Kaszubski
Great work and watch is ticking again.
January 26, 2013, 19:59
Larry Lamphier
Great Job Roger!!

That is REALLY small also.

How long did it take to do it?

Regards,
Larry
January 26, 2013, 20:19
Roger J. Nolfe
Thanks for the kind comments.

I didn't keep track of the hours involved and it took awhile to come up with the right combination of material and gravers to use. I also had several failures along the way. If I had to guess I probably spent 4.0 hours or so at this BUT I learned a lot along the way. An old time watchmaker could probably have made the part in less than an hour...without the advantage of great lighting and a microscope to work under. I have a great appreciation of the abilities of our predecessors.
January 26, 2013, 21:35
Bruce Byrd
Roger, what type of material did you use?


Bruce Byrd
January 26, 2013, 21:53
Bruce Stewart
Roger, I have a need to modify a stem from a different brand of watch to work in a 1920's Rebberg Rolex movement. I will be doing this on the lathe and was wondering if the stem I'll be working with has to be softened (annealed?) prior to working with the gravers, and then rehardened before putting it into service? Thanks. Smile
January 26, 2013, 21:55
Patrick Wallin
Roger. You are a man of great talent.
It really gives me goose bumps when I hear a watchmaker has renewed a masterpiece of old. This may still be around for your grand kids to cherish and even family after that.
January 27, 2013, 07:13
Edward Kitner
For many of you who do not know Roger he is a treasure trove of knowledge and has a true drive to accomplish what he set's his mind to.
I would have to say that I would bet the staff he made is better than the original. A better fit and finish, even thought he took longer to make it.
Eric, how is the watch running?
January 27, 2013, 08:25
Vincent Pullara, Jr.
Congratulations Roger, job well done.
January 27, 2013, 09:35
Roger J. Nolfe
Thanks again for all the kind words guys!

Bruce...I tried several materials including pivot wire, but ultimately settled on drill rod. I purchased a good supply of very small broken drills, the rod diameter is just under 1mm and the tips of the drills tapered to sizes of around .25mm.

Bruce S....If your gravers are sharp enough, you should be able to make the modification without any heat treating. You might spend as much time re-sharpening as you do working, but it is very important. I also like carbide gravers.

Patrick...Thanks, and I wish it were my watch, but it belongs to a forum member, Eric Unselt. Maybe he'll post pictures of the watch in it's case.
January 27, 2013, 11:20
Jon Hart
Roger,

Amazing work from start to finish!!!

And yes a photo is worth a 1000 words!

Big Grin
January 27, 2013, 15:04
Eric Unselt
The watch in question is a Rockford 21j 655 wind-indicator - another Jones-Horan score from the September 2012 auction.


January 27, 2013, 15:07
Eric Unselt
Roger's tenacity and talent in fabricating the part was very much appreciated, since finding a replacement was nearly impossible. Not only did Roger mill a replacement for the busted pallet staff, he re-set the pallet stones, re-poised the wheel, and re-shellacked the roller jewel to correct multiple problems - and it's keeping perfect time.


January 27, 2013, 15:08
Eric Unselt
Cased in B&B's finest:


January 27, 2013, 17:00
Evan Patton
Stunning!
January 27, 2013, 22:35
Bruce Byrd
Gorgeous!


Bruce Byrd
January 28, 2013, 08:52
Edward Kitner
Eric, I think you should name this watch "The Phoenix" Big Grin
February 01, 2013, 04:08
Stephen John Ward
Fantastic precision work Roger....well done.