Continuing with the Manufactured in
Australia project. It has been a busy week with plenty of excitement.
Josh is currently manufacturing titanium screws, reaching the 'new
small' with a thread diameter of 0.8mm. The screws are turned and
threaded on the Citizen CNC lathe. The screw polishing jig is done as
well, with internal holes having a thread of 0.8mm and 0.6mm. This is
done on the Kern mill using an amazingly small threading cutter. Note
the photo of the cutter next to a human hair. We are not quite there
yet, more fine tuning to follow, but the first screws are already fully
In the mean time, Andrew is working on the
NH Regulator Clock. When we started this project a couple of years ago,
it was based on an English design. Last month we finally got back into
it - and we made the decision to ditch the old design and start from
scratch, designing our own clock. From the layout and unique power
maintenance work, to holding all the wheels not in brass bushings but
seated in ceramic ball bearings. We also wanted 'perfect' dial symmetry
with the minute hand in the centre, seconds and hours in line and two
winding squares. It is completely 'in house', from design to
manufacturing. A small curiosity is the gear tooth profile - which is
not a clock, but watch profile. The plan is to have a fully tested and
working regulator on the wall by Christmas.
Here is a quick 60 seconds video of the first couple gears in motion.
The almost friction-less motion is mesmerising because clock gears are
not supposed to turn so smoothly, and especially not while just sitting
supported in one bearing.