RM 07-04

Automatic Winding Sport

Skeletonised automatic-winding movement with hours, minutes and function selector.

Around 50 hours (± 10%).

Manufacturing these components in grade 5 titanium with black PVD and electroplasma treatments confers great rigidity on the entire assembly, as well as precise surface flatness, essential for perfect functioning of the gear train. Grade 5 titanium is a biocompatible, highly corrosion-resistant and remarkably rigid alloy, which enables the gear train to function effortlessly. The alloy is 90% grade 5 titanium, 6% aluminium and 4% vanadium.

This combination further increases the material’s mechanical properties, which explains its frequent use in the aerospace, aeronautics and automotive industries.

These components are satin-finished, microblasted and beveled by hand. They were subjected to separate and extensive validation tests to ensure they met rigorous strength requirements.

By using a platinum rotor with the OneWay® winding system and ceramic ball bearings, the barrel can be efficiently wound while maintaining the compact dimensions of the skeletonised movement.

Movement dimensions: 29.90 x 22.00 mm

Thickness: 5.13 mm

Jewels: 27

Balance: CuBe, 4 arms, 4 setting weights, moment of inertia 7.5 mg•cm2, angle of lift 50°

Frequency: 28,800 vph (4 Hz)

Balance spring: AK3

Shock protection: INCABLOC 908.22.211.100 (transparent)

The case of the RM 07-04 is made from Quartz TPT® for five watches and from Carbon TPT® for one watch.

These materials are exclusive materials to the brand in watchmaking with a unique appearance. Their remarkable damascene surface displays extremely regular yet totally unique striations, as they are composed of multiple layers of parallel filaments obtained by dividing carbon fibres or silica threads.

Quartz TPT® fibres are generally used for very high-performance applications due to their resistance to high temperatures, their strength and their transparency to electromagnetic waves. Fibres are aligned in layers no thicker than 45 microns and saturated in resins developed specially for Richard Mille. These layers are then stacked using an automatic positioning system that changes the orientation of the fibre between each layer by 45°.

• • Anglage hand polished

• • Microblasted milled section

• • Microblasted sinks

• • Black DLC treatment for the baseplate and bridges

• • Satin-finished surfaces

• • Anglage hand polished

• • Hand-polished bevelling

• • Hand-polished locking section

• • Concave chamfering with a diamond tool

• • Diamond-polished angles

• • Circular-finished faces

• • Rhodium plating (before cutting the teeth)

• • Minimal corrections applied to the wheels in order to preserve geometry and performance

This type of barrel provides the following advantages:

The phenomenon of periodic internal mainspring adhesion is significantly diminished, thereby increasing performance. Provision of an excellent mainspring delta curve with an ideal power reserve/performance and regularity ratio.

The entire going train of the watch, the primary transmitter of power throughout the movement, utilises a special profile for the teeth of the wheels, ensuring a 20° pressure angle. This system equalises any discrepancies that might arise among the centres of the wheels, for instance due to thermal changes and normal use, and promotes the smooth transmission of torque to the balance wheel, thus supporting excellent chronometric results.

This permits better control of the torque applied to the screws during assembly.

These screws are therefore unaffected by physical manipulation during assembly or disassembly and age well.