RM 004-V2 SPLIT SECONDS CHRONOGRAPH 503.062C.91
- Movement Type: Tourbillon
Richard Mille RM 004-V2 503.062C.91
Herald at their intial release in 2001 as a break from the past and a new direction of horology, the wristwatches of Richard Mille were from their very inception, extraordinary and uncompromising.
TECHNICAL SPECIFICATIONS OF THE SPLIT SECONDS CHRONOGRAPH RICHARD MILLE RM 004-V2
For the first time in watchmaking history and after years of research and development, a movement baseplate in carbon nanofiber has been created. This innovation was first tested with great success on the RM 006, an experimental model. The technical results were remarkable and this led to the extended use of carbon nanofiber in the RICHARD MILLE tourbillon range, as well as in the split seconds chronographs. Progress in this important area of development has now opened up a new era in watchmaking.
CALIBER RM004-V2: manual winding movement with hours, minutes, chronograph, split seconds, 30 minute totalizer, power reserve indicator, torque indicator, function indicator.
Dimensions: length 48 mm x 39.70 mm (widest point) x 14.95 mm (thickest area)
MAIN FEATURES
(MANY OF WHICH ARE MAJOR TECHNICAL INNOVATIONS)
POWER RESERVE
• Circa 50 hours without chronograph running.
• Actual power reserve results will depend on the period of time the chronograph is utilized.
CARBON NANOFIBER BASEPLATE
This is an isotropic composite material created from carbon nanofibers molded under a high pressure of 7,500 N/cm2 and a temperature of 2,000˚C, resulting in a material with high mechanical, physical and chemical stability in all directions. The ribbed perimeter of the movement plate assures the highest rigidity between the plate and bridges. Carbon nanofiber composite structures such as this are amorphous, chemically neutral and dimensionally constant within a very wide range of operating temperatures, including those outside of normal ranges. This stability assures the highest integrity of the movement’s going train under all conditions.
CHRONOGRAPH (column wheels in titanium)
The modern architecture of this movement has allowed for the consistent and rational arrangement of its constituent parts, avoiding unnecessary superimpositions and permitting the best possible use of the functions with technical solutions. For example, research was conducted into the geometric design of the column wheel that controls the different levers to ensure the perfect, long-term simultaneity of the functions, a feature that is essential for a high performance chronometer. This design was implemented in order to achieve a high degree of continuity in setting, combined with an unfailing repeatability of the various functions.
Operation: The user can start or stop the chronograph function via the pusher located on the lower left at 8 o’clock. The hands are reset by pressing another pusher located on the upper left at 10 o’clock.
SPLIT SECONDS MECHANISM with improved performance
One of the new characteristics developed for the RM 004-V2 is the virtually complete elimination of initial jumping in the chronograph seconds hand. A great number of studies led to the design and manufacture of gear wheels and levers in titanium, thus reducing inertia. Moreover, the development of a new generation of split seconds components meant that energy consumption could be lowered by approximately 50% by reducing friction on the spindle, as well as eliminating the effect of jumping when stopping, thanks in particular to research that focused on the working of the split seconds arms.
Operation: simply by pressing the pusher on the right (at 4 o’clock), the user can stop the split seconds hand in order to read an intermediate time while the chronograph is engaged. Pressing the pusher again allows the split seconds hand to rejoin the chronograph.
TORQUE INDICATOR
This indicator supplies information about the tension of the mainspring, and allows the optimalization of the chronometric functioning of the movement. Below 53 dNmm, the spring is considered to be too slack, while above 65 dNmm, the excessive spring tension can adversely affect the mechanism’s operation, or else actually endanger it. These indications appear on the numerical zone to the right of the barrel.
BALANCE WHEEL WITH VARIABLE INERTIA
This type of balance wheel, which represents the ultimate in innovation, guarantees greater reliability when subjected to shock and also during assembly and dismantling of the movement, thus achieving better chronometric results over time. The index is eliminated, thereby allowing a more precise and repeatable adjustment.
FAST-ROTATING BARREL (6 hours per revolution instead of 7,5)
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.
BARREL PAWL WITH PROGRESSIVE RECOIL
This device permits an appreciable winding gain (circa 20%), especially during the start of winding. It also aids in the even distribution of the mainspring’s internal tension.
BALANCE SPRING
Developed in the 18th century, perfected and codified in the 19th, the specially calculated curvature of the balance spring provides excellent chronometric results in tourbillon escapements.
CLOSURE OF THE BARREL COVER USING EXCENTRIC SCREWS
This development is again part of the intention to make servicing easy, logical, and of a very high mechanical standard.
TEETH OF BARREL AND THIRD-WHEEL PINION WITH CENTRAL INVOLUTE PROFILE
The wheel with a central developing profile and a pressure angle of 20° promotes rolling movement more effectively, compensates differences between centers, ensures excellent torque transmission and a distinct improvement in performance.
SPLINE SCREWS IN GRADE 5 TITANIUM FOR THE BRIDGES AND CASE
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.
OTHER FEATURES
• Center bridge: in titanium
• Movement dimensions: 30.20 x 28.60 mm
• Thickness: 8.90 mm
• Diameter of the balance wheel: 10 mm
• Number of jewels: 37
• Balance wheel: GLUCYDUR, 2 arms
• Moment of inertia: 11.50 mg.cm2, lever angle 53°
• Frequency: 21,600 vph (3 Hz)
• Balance spring: ELINVAR by Nivarox
• Shock resistance: KIF Elastor KE 160 B28
• Barrel shaft: Steel sandwich, 20 AP
FINISHING
MOVEMENT
• Anglage and polishing by hand
• Locking sections hand polished
• Sapphire blasted milled sections
• Lapped and polished contact points
• Burnished pivots
STEEL PARTS
• Sapphire blasted surfaces
• Anglage and polishing by hand
GEAR WHEELS
• Concave chamfering with a diamond tool
• Circular finished faces
• Gilded (before cutting the teeth)
• Minimum correction applied to the wheels in order to preserve geometry and performance