A true synthesis of the identity of its collections, the RM 30-01 stays true to Richard Mille’s key values: ergonomics, pure lines and exceptional finishes. The RM 30-01 Automatic with Declutchable Rotor epitomises not only the quintessence of the brand, but also the many aesthetic adventures experienced by Richard Mille for over twenty years.
With the RM 30-01 Automatic with Declutchable Rotor, the brand is demonstrating its ability to generate intense emotion stemming from the excellence of its technical expertise.
RM 30-01 Automatic Winding with Declutchable Rotor
Skeletonised automatic-winding movement with hours, minutes, seconds, oversize date, clutch engagement and power-reserve indicators, function selector and declutchable variable-geometry rotor.
Around 55 hours (± 10%).
The baseplate and the bridges are crafted of grade 5 titanium, 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 automobile industries. The baseplate of the RMAR1 calibre has been optimised to achieve an extremely low weight/resistance ratio.
The skeletonised baseplate and bridges were subjected to separate and extensive validation tests to ensure they met rigorous strength requirements.
The winding of an automatic wristwatch is accomplished by a small rotor that revolves when moved. Its cyclical movement provides energy to the winding barrel, which reaches its optimal tension once it is fully wound. After this point, excess tension due to overwinding can easily occur and must be avoided. This is traditionally achieved using a sliding flange that allows the spring to slip, preventing the movement from becoming overwound.
However, this traditional system allows harmful debris to build up inside, as the flange brakes on the winding barrel’s interior overextended periods, especially when a person is particularly active.
To avoid such adverse conditions, Richard Mille’s exclusive declutchable rotor automatically disconnects from the winding barrel at the moment when the spring is fully wound. When the power reserve reaches 55 hours, the rotor is declutched automatically thanks to a specially developed gear system. As a result, the rotor is disengaged from winding the barrel.Conversely, when the power reserve decreases to 40 hours, the rotor is automatically clutched, and the watch starts another winding phase until the indicator reaches 55 hours. This solution allows both the movement and the oscillator to operate at the best ratio of constant torque/power providing optimal chronometric performance.
It is possible to check on these phases thanks to the clutch engagement indicator located at the upper-left corner, which keeps the user informed whether the rotor is operating in winding phase (on) or is disengaged (off).
Typical of Richard Mille, the declutchable rotor is a major innovation in both its conception and miniaturisation, which represents an extraordinary technical challenge in and of itself.
• Central flange in grade 5 titanium
• Heavy metal weight segment
• 18K white gold wings with 5 possible positions adjusted by screws in grade 5 titanium
• Ceramic ball bearings
• Unidirectional anti-clockwise winding
OVERSIZE DATE DISPLAY
Semi-instantaneous, placed in a horizontal aperture at 4 o’clock.
In a manner similar to a car’s gearbox, a push-button located at 2 o’clock allows one to select the winding, date setting and hand setting functions with a simple push. A hand at 3 o’clock displays the selected function.
Movement dimensions: 31.25 x 29.45 mm
Thickness: 5.41 mm
Number of jewels: 38
Barrel arbour: AP 20 steel
Balance: Glucydur®, 4 arms, 4 setting weights, moment of inertia 4.8 mg•cm2, angle of lift 53°
Frequency: 28,800 vph (4 Hz)
Balance spring: elinvar by Nivarox®
Shock protection: INCABLOC 908.22.211.100 (transparent)
Escapement wheel jewels: Rubifix (transparent)
The design and execution of the watch demonstrate a holistic approach to conception of the movement, case and dial. As a result, everything has been constructed according to extremely rigorous specifications, in the manner of the analytical engineering methods used in the design of Formula 1 racing cars, where the chassis and the engine are developed in complete harmony. For example, a casing ring is no longer used, and the movement is mounted on chassis mounting rubbers (ISO SW) fixed by grade 5 titanium screws. Features such as these provide evidence of uncompromising workmanship.
The taut lines and complex geometry of this case make it one of the most difficult to develop and produce in the entire watchmaking industry. The RM 30-01 inherits the artistic and technical options that have been developed with such rigour by Richard Mille.
Satin-finished, microblasted and polished titanium highlights the iconic sculptural tonneau-shaped case. Its extreme lightness, 96 grams, strap included, and its ergonomics contribute to a remarkable wearing comfort.
The tripartite case is water resistant to 50 metres, ensured by 2 Nitrile O-ring seals. The case is assembled with 20 spline screws in grade 5 titanium and abrasion-resistant washers in 316L stainless steel.
• Baseplate and bridges in hand-ground grade 5 titanium, wet sandblasted, Titalyt® treated
• Barrel bridges PVD coated
• Burnished pivots
• Pinions with undercuts
• Sapphire blasted and hand-drawn surfaces
• Screw slots and screws bevelled and polished with rounded and polished tip
• Anglage and polishing by hand
• Sandblasted and rhodium plated, bevelled wheels (before cutting the teeth)
• Minimal corrections applied to the wheels in order to preserve geometry and performance
The double-barrel system helps to improve torque stability over a longer period. This is achieved by distributing the stored energy across two winding barrels instead of one, which increases the number of rotations and reduces pressure on the teeth, bearings and pivots, resulting in better long-term performance.
The free-sprung balance offers better reliability in the event of shocks, movement assembly or disassembly, and also guarantees better chronometric results over time. The regulator index is eliminated, and a more accurate and repeatable calibration is possible thanks to 4 small adjustable weights located directly on the balance.
This permits better control of the torque applied to screws during assembly. These screws are therefore unaffected by physical manipulation during assembly or disassembly and age well.