Co-Axial
Co-Axial is a trademarked term for an Omega escapement based on the work of English watchmaker George Daniels.
History
The well known watch company Omega caused a stir in 1999 with the unveiling of a production watch movement with a co-axial escapement. This invention by the English watchmaker George Daniels was hailed as one of the first real advances to basic timekeeping in over two centuries. Although many other watchmakers had considered adopting Daniels' design, only Omega moved to production, purchasing the patent from him in 1993.
A co-axial escapement differs from the conventional Swiss lever escapement by a significant reduction of friction. Consequently this system requires less or no lubrication and runs for a longer period free of maintenance. In a co-axial escapement, there are two stacked (co-axial) escape wheels and a three-pointed pallet fork: One of these star-shaped gears interacts with the outer "entry" and and "exit" pallets, while the other sends power impulses back to the regulator.
With the Cal. 2500 in the De Ville Co-axial, an automatically driven chronometer, the technology came to serial production for the first time. In the following years it was introduced in an increasing number of Omega movements, and is now found in most models.
Cal. 2500 was based on the existing Cal. 1120, itself an ETA movement.
In 2007, Omega introduced their first movement designed for the Co-Axial escapement. Cal. 8500 allowed the technology to be enhanced, with more room for the system. As of 2011, Cal. 8500 also features a silicon hairspring, as do later Co-Axial movements. The first in-house Co-Axial chronograph movement, Cal. 9300, was introduced in 2011.
Co-Axial Calibres
Omega has adapted or designed in the Co-Axial escapement for the following movement families:
- 1999 Omega 2500 (2402, 2403, 2500, 2507, 2520, 2627, 2628) Automatic (based on Omega 1120)
- 2005 Omega 3313 (3201, 3202, 3203, 3205, 3113, 3313, 3603, 3612) Automatic chronograph (based on Omega 3301)
- 2005 Omega 2202 Automatic with small seconds (based on ETA 2895-2)
- 2006 Omega 2610 Automatic (based on ETA 2896)
- 2007 Omega 8500 (8400, 8401, 8500, 8501, 8507, 8508, 8511, 8601, 8602, 8605, 8611, 8612, 8615) Automatic
- 2007 Omega 2007 Hand winding
- 2007 Omega 2635 (2635, 2636, 2637, 2638) Tourbillon
- 2008 Omega 8520 (8520, 8521, 8421) Ladies automatic
- 2008 Omega 3888 (3888, 3890) 4 or 5 register automatic chronograph
- 2010 Omega 8520 (8520, 8521, 8421) Ladies automatic
- 2011 Omega 9300 (9300, 9301) Automatic chronograph
- 2011 Omega 9300 (9300, 9301, 9605, 9615, 9900, 9901, 9904, 9905) Next-generation automatic chronograph
- 2013 Omega 3330 Automatic column wheel chronograph (based on ETA 7753)
- 2015 Omega 8900 (8900, 8901, 8902, 8903, 8906, 8912, 8913, 8922, 8923) Next-generation automatic movement (to replace 8500), magnetic resistant
- 2016 Omega 8704 (8704, 8705) Ladies automatic
- 2016 Omega 8800 (8800, 8801) Automatic