Omega Launches First Coaxial Escapement Device

Omega coaxial 9300/9301 movement
    In 1999 Omega released the first coaxial escapement device, leading the revolution in watchmaking technology. The latest achievement of this watchmaking revolution is the new Omega Co-Axial 9300/9301 movement, which was launched in 2011. This new movement not only has extraordinary chronological performance, but also the first movement in the Omega family of movements with chronograph function.
    The innovative vertical chronograph function is reflected in the small chronograph dial at 3 o’clock, which has both 12-hour and 60-minute chronograph hands. This arrangement of hands is similar to the arrangement of the hour and minute hands on the main dial, which is consistent with people’s time reading habits. There is also a central chronograph hand and a small second hand on the small dial at 9 o’clock.
    The two timing control buttons can perform their functions completely independently, thereby avoiding the risk of improper operation to the timing system.
    Like other Omega in-house coaxial movements, the 9300/9301 movement has a decorative pattern called the ‘Arabic Geneva pattern’.
    This movement has a time zone function, and the hour hand can be adjusted independently without stopping the time, which is very suitable for travellers.
   The movement is also equipped with a hairspring made of silicon. Silicon is a non-magnetic substance, so it is not affected by magnetic fields. This attribute, combined with the excellent elasticity coefficient of silicon material, enables the hairspring attached to the silicon material sheet to bring more accurate running time performance. The fatigue effect of silicon material is low, and the aging rate is slow. The perfect combination of coaxial technology and silicon hairspring brings extraordinary and reliable performance to the watch. Therefore, Omega provides a guarantee of up to 4 years for each coaxial watch equipped with silicon hairspring.
Omega coaxial escapement
    In 1999, Omega unveiled its first coaxial escapement device, moving the entire watchmaking industry. This is the first practical new escapement in 250 years. The components of the Omega coaxial escapement system are very different from the Swiss lever escapement system that has been used in the watch industry for a long time. It consists of a balance wheel with gemstone pawls and impact stones, and a three-arm escapement. A longitudinal fork, and a three-layer coaxial escapement wheel composed of a coaxial wheel, a coaxial gear and a transmission gear for connecting the transition wheel and the train wheel.
Advantages of coaxial escapement
   The main advantage of comparing Omega’s coaxial escapement to the Swiss lever escapement is obvious.
   No matter which escapement system is used, its energy must be transmitted to the pendulum, and this energy maintains the frequency of the pendulum. In the Swiss lever escapement, the gear teeth need to slide over the inclined surface of the pawl to generate impulse. Because this sliding process will inevitably produce a certain amount of friction, if you want to ensure the accuracy of the escapement system, you must maintain the best lubrication. In contrast, the Omega coaxial escapement transmits energy through radial impulse. The smaller contact surface and push action (rather than the sliding action of the lever escapement) greatly reduce friction between escapement system components. Therefore, the loss of lubrication is greatly reduced, and the maintenance period is extended.
    In the Swiss lever escapement, whether it is a clockwise or counterclockwise impulse, it is indirectly transmitted from the escape wheel to the balance roller through the pallet fork, so a lot of energy is lost. The clockwise impulse of the Omega coaxial escapement is transmitted directly to the jewel pawl on the balance wheel via the escapement gear teeth. Therefore, the coaxial escapement has higher mechanical efficiency and ensures more stable and precise performance.
Coaxial escapement and balance without balance spring
    By using the Omega Co-Axial escapement with a cardless balance with hairspring, the watch speed can be adjusted by changing the moment of inertia of the balance wheel, instead of changing the effective length of the hairspring through the clip. This adjustment is made by gold miniature screws embedded in a circular balance wheel. The combination of the coaxial escapement system and the cardless balance with hairspring not only improves the seismic performance, but also effectively avoids interference.
    The above advantages of the Omega Co-Axial Escapement System are obvious. More advantages can be realized after a long period of time, including longer repair and maintenance intervals, and long-lasting ultra-precise performance.
Omega coaxial 9300/9301 movement
21st Century Chronograph Movement
    Omega has been working on innovations in coaxial watch technology since 1999, and the 9300/9301 coaxial movement means that Omega continues on this path. With vertical wheel timing, exceptional reliability and up to 4 years of after-sales service guarantee, this new movement perfectly fulfills the promise of the inventor of coaxial escapement, British watchmaker George Daniels : Coaxial technology will ‘continue the popularity of mechanical watches to the 21st century and beyond.’