Our Manufacture Calibre A35
Damasko Four-Point Ball Bearing
New micro ball bearings for rotors and winding systems go into serial production. To find out more, please click on our Technology section.
After nearly 3 years of developmental work, we are now in a position
to present a fundamental new product development - the EPS® balance
spring made of polycrystalline silicon. To find our more, please click
on our “Technology” section. The spring is another major milestone in
the development of our relatively new manufactory, but also a revolutionary
step in the tireless striving for isochronism in transportable mechanical
watches. It is made of polycrystalline silicon that was produced as
a layer by epitaxial vapour-phase deposition for the very first time
in the height required for balance springs. Based on this deposition
method, crystal sizes in the nanometer range can be produced, which
predestines this material for mechanical uses.
However, not only the spring, but also the pallet, the escape wheel and the watch plate are made of silicon in the newly developed and self-manufactured calibre with the name “A35”, which will be presented in the coming months. Moreover, the new “A35” has a completely new and patented ratchet winding system for which special 4-point micro hybrid bearings without play were developed which, in the same way as also the rotor bearing, work without any lubricants due to the combination of materials, namely steel raceways and ceramic balls.
The company Damasko has invested nearly 3 million euros in manufacturing machines for production of the own calibre. Among other things, circuit boards, wheels and pinions, the balance and spring barrel, as well as rotors along with rotor bearings are fabricated. The surface finishing or refinement is also done internally in the form of ornamental polishing and subsequent electroplating.
This represents a major expansion in the production depth of the company Damasko, which up until then had already fully developed and self-manufactured its own cases along with crowns, pushers and barrels.