Richard Mill Rm 50-03 Mclaren F1 Ultralight Double Seconds Chasing Tourbillon Chronograph Technical Specifications

At the 2017 SIHH Watch Show, high-end watchmaker Richard Mille launched this RM 50-03 McLAREN F1 ultralight two-second chase tourbillon chronograph. The smooth lines and classic style are the result of the fusion of brand technology and traditional watchmaking. The following are the technical specifications of the F1 ultralight two-second chase tourbillon chronograph:

Graph TPT ™ limited edition of 75 pieces

    RM50-03 Movement: Manual-winding tourbillon movement with hour, minute and double-second chronograph, 30-minute timer and power reserve, torque and function indicators. (Dimensions: 44.50 mm x 49.65 mm x 16.10 mm)
The main function

Power reserve
   Approximately 70 hours (± 10%), located at 11 o’clock and displayed on a digital scale.
Ultralight Tourbillon Movement Made of Titanium and TPT ™ Carbon Fiber

   The RM50-03 movement weighs only 7 grams. Through the use of high-tech materials and extremely hollow parts, we have achieved unprecedented ultra-light weight. Grade 5 alloy base plate and bridge plate have extremely high corrosion resistance and excellent rigidity, allowing the gear to run effortlessly. This alloy (90% titanium, 6% aluminum, and 4% vanadium) enhances the mechanical properties of the latter.
   In the two-second chronograph chronograph, the horizontal holder that supports the entire movement together with the barrel and the tourbillon bridge is made of TPT ™ carbon fiber, and some bridges are also made of this material. The horizontal holder is attached to the middle of the case, which eliminates the need for a case ring and achieves a perfect fusion of the movement and the case.
   All these technical solutions make this movement with a complex structure and an extreme weight resistance ratio have an amazing performance in resistance, which has been verified in our workshop by a 5000g impact test.
New dual seconds tracking system

   The RM 50-03 calibre introduces a new generation of two-second tracking mechanism developed by the engineers of RICHARD MILLE.
   The new column wheel can manipulate the different levers of the two-second chasing hand device to optimize the performance of the chronograph. Unlike the traditional 8-post design of the previous RICHARD MILLE chronograph, the RM 50-03 is only equipped with 6 guide posts to ensure optimized synchronic movement, maximum function lock and higher adjustment durability.
   We have also conducted in-depth research on fixture functions and achieved a completely new fixture design. The RM 50-03 also replaces the previous coil spring with a blade device on the double-second tracking wheel. This technical decision reduces the torque variation when the double-second tracking function is enabled.
These research and development achievements have greatly improved the timing performance of this tourbillon movement, reduced the friction of the mandrel, and successfully halved the kinetic energy consumption.
   The eight o’clock button starts or stops the chronograph second hand. The button at 4 o’clock can pause the chase hand to read the stop time while the chronograph second hand is running. Press the button again, and the chase hand will immediately catch the chronograph second hand, ready to record a period of time. The button at ten o’clock resets the second hand.
Torque indicator
   The indicator shows the tension information of the mainspring to optimize the winding performance of the watch. When the reading is below 53 dNmm, it means that the mainspring is too loose. However, if it is higher than 65 dNmm, it means that the tension of the mainspring is too large, which may affect the normal operation of the movement and even damage the movement. (The indicator is in the digital scale on the right side of the barrel next to the two o’clock position).
Function indicator
   Its principle is similar to that of a car’s gearbox. When the crown is pulled out, the winding indicator, manual setting or neutral position can be seen through the function indicator. The currently selected function is displayed by the hands at four o’clock: W (winding), N (neutral) and H (manual setting).
Variable inertia balance without hairspring
   This type of balance wheel can effectively improve the watch’s reliability when subjected to vibration and movement disassembly, thereby ensuring more accurate movement for a long time. Cancel the fine-tuning system of the fast and slow needles, and through the 4 adjustment weights on the balance wheel, the inertia of the balance wheel movement can be adjusted stably and finely.
Quickly rotate the barrel (6 hours instead of 7.5 hours per revolution)

These barrels have the following advantages:
   Greatly reduces the internal mainspring cycle adhesion phenomenon, thereby improving its performance; forming a perfect mainspring delta curve, achieving the ideal ratio between power reserve, performance and regularity.
Progressive rebound function barrel pawl

   This device can save a considerable amount of energy (about 20%) when it is chained, especially at the beginning of the chain. It also helps to evenly distribute the internal tension of the mainspring.
Clockwork tooth and third pinion adopt central involute tooth profile

   The central involute profile of these gear teeth can provide an optimal pressure angle of 20 °, which helps to improve gear transmission efficiency and offset the meshing deviation of gears, thereby ensuring good torque transmission and significantly improving its performance.
Modular time setting device fixed on the bottom cover
It has the following advantages in terms of service life and maintenance:
   Because the device is installed outside the movement, in the event of failure or maintenance, the time setting device can be replaced without touching the bottom plate of the core; when removing and installing the module from the case back, there is no need to remove the hands and dial .
Case and bridge plate with five grade titanium alloy spline screws
   In design, it is easier to grasp the tightening torque acting on the screws during assembly. Therefore, the screw is not affected by the physical operation in the disassembly and assembly process, and it is less prone to aging.
Other features
Movement size: 31.10 mm x 32.15 mm
Thickness: 9.92 mm
Tourbillon diameter: 12.40 mm
Balance wheel diameter: 10 mm
Number of jewels: 43
Balance wheel: 2-arm beryllium bronze alloy, 4 adjusting screws
Moment of inertia: 10 mg.cm2, lift angle 53 °
Vibration frequency: 21600 times per hour (3 Hz)
Balance spring: Nivarox® elinvar alloy
Earthquake protection: KIF Elastor KE 160 B28
Barrel shaft: Nickel-free Chronifer (DIN x 46 Cr 13 + S) with the following characteristics: stainless – antimagnetic – temperable

GRAPH TPT ™ (graphene) case

   The bezel and case back are made of Graph TPT ™. This TPT ™ carbon fiber material significantly improves physical properties due to graphene injection. This innovative nanomaterial is 6 times lighter than steel but has strength 200 times that of steel.
   Based on the research results of the National Graphene School of the University of Manchester, our engineers and colleagues at North Thin Ply Technology (NTPT®) can work together to realistically draw this material technology on paper and study how to incorporate graphene TPT ™ carbon fiber material.
   TPT ™ carbon fiber has a unique, wave-breaking structure and is compounded by 600 layers of parallel microfilaments separated from carbon fiber. These microfilament layers, each up to 30 microns thick, are fused with a graphene-containing resin. Using special mechanical assembly technology, each layer is stacked together in different fiber directions, and each layer has an included angle of 45 °. These parts are cured by heating in a 120 ° C kiln at a pressure of 6 bar. McLaren Applied Technology has passed multiple quality control and verification tests to provide the most suitable solution for processing RICHARD MILLE, a proprietary material.
   After spending a lot of time developing and creating programs and suitable cutting tools that achieve near-micron accuracy, experts at the RICHARD MILLE ProArt watchmaking workshop continue to complete the task of machining Graph TPT ™. They have always been committed to machining Movement components and case. The RM 50-03 case uses two Nitril seals to ensure 50 meters of water resistance. The case is assembled of 20 grade 5 titanium alloy spline screws and 316L stainless steel wear-resistant washers.

Torque-limited crown

   This new safety device prevents accidental over-winding of the watch, causing damage to the winding stem or excessive pressure on the barrel.
Upper and lower flanges

   Metallic time scale, filled with qualified luminous material.
   Grade 5 titanium alloy, black electroplated surface layer.
Bezel and case back

Bezel side: anti-glare sapphire crystal (Vickers hardness of 1,800) (both sides) thickness: 1.10 mm
Case back: Anti-glare sapphire crystal (double-sided) Thickness: 1.00 mm
Graphene-infused rubber strap

   With the cooperation with BIWI SA, a Swiss company specializing in extremely high-precision vulcanized synthetic rubber models, RICHARD MILLE injected graphene into the strap of RM 50-03 to improve its rubber performance and thereby improve wear resistance Sex.
Seiko modification


Chamfered hand polishing
Hand-polished locks
Milled blasting
Contact polishing
Bearing polishing
Stainless steel components
Surface drawing and micro-blasting
Chamfered hand polishing
Diamond tool polished concave chamfer
Double-sided round sanding decoration
Rhodium (before cutting)
Minimal gear correction to maintain its geometry and performance