The third wheel is the smallest in the going train of my watch, with 90 teeth. The process for making this was:

1. Cut a wheel blank out of 0.2mm titanium sheet.

2. Attach the blank to a brass wax chuck with superglue and turn down to the wheel full diameter on the Schaublin 70 lathe.

3. Set up the Aciera F1 so that the end of the electronic indexing spindle was facing the horizontal spindle so that the 5 circles could be cut Continue reading Third wheel →