As my instructor and I were quite happy about the result of the prototipe we thought it was time to make the real thing in steel.
So I set up everything once again, sharpened the gravers, chucked a steel rod in the shaublin 70 and off I went to make it.
Followed exactly the same procedures for the prototipe piece, drilled the centre hole, turned down the rod to dimensions, set the milling attachment on the cross slide and the mounted the microscope on the tail stock and centered it first with the steel rod and then centered the cutter with the microscope.
Engaged the dividing head, made all the necessary and final checks, found the right depth for cutting the teeth, and then started cutting, first I cut the cycloid on the external circumference and then the breguet teeth in the front part of the pinion.
Once all the cutting was over I parted off the pinion from the rod and then I had to reduce the pinion to right dimension, clean it and remove all the burrs.
Then I hardened and tempered to a blue color, cleaned once again and light polished it with diamond paste.
Cleaned it again from the paste residuals in between the pinion leaves and ratchet teeth, I made a final check for eventual burrs left over and it was done.
Trided in the movement and the result was very satisfactory
Here in the pictures you can see the final result, a good few days of hard work but well worth it.
