RM 12-01

Manual Winding Tourbillon
RM 12-01watch cover
RM 12-01

Introduction

AN UNCOMPROMISING CALIBRE

We have revisited the extraordinary movement of the legendary RM 012, reconciling innovations at the level of materials with a testament to horological architecture. Known as the RM 12-01 Tourbillon, this is an uncompromising calibre that reinterprets the art and methods of watch design in the 21st century.
Its unibody baseplate, in which the caseband and baseplate have been fused into a single piece, was inspired by the chassis of racing cars and enhances rigidity and resistance to impact. A major watchmaking and technological breakthrough, the unibody baseplate is a technical feat that requires in-depth knowledge and mastery of micro-machining new materials—knowledge Richard Mille has nurtured since the very beginning.

RM 12-01 TOURBILLON

CALIBRE RM12-01

Manual winding tourbillon movement with hours and minutes.

RM12-01_TPT-GOLD_FULLFRONT_BB

POWER RESERVE

Circa 70 hours (± 10%).

PR12_01

UNIBODY BASEPLATE IN CARBON TPT®

The baseplate of the RM 12-01 is machined from Carbon TPT®, a material consisting of multiple layers of parallel filaments obtained by separating carbon threads. With a maximum thickness of 30 microns, the Carbon TPT® layers are saturated with resin then piled onto a special machine that modifies the orientation of the fibres between each layer by 45°. Once heated to 120°C and subjected to a pressure of 6 bars, the Carbon TPT® is machined at Richard Mille’s parts factory.

The baseplate of the RM 12-01 is an integral part of the case. The case middle has been eliminated. The bezel and caseback are assembled directly on the baseplate, which is described as ‘unibody’ — a type of racing-car construction that ensures maximum rigidity and greater resistance to impacts.

The skeletonised Carbon TPT® baseplate is a significant feat of machining. A master component of the RM 12-01, this piece was subjected to a full battery of extreme tests prior to approval in order to optimise its mechanical properties.

RM12-01_TPT-GOLD_34BACK_BaseplateB

BRIDGES MADE OF GRADE 5 TITANIUM

The baseplate supports the grade 5 titanium bridges, which are highly original in terms of their three-dimensional construction. Extremely stylized, the sharp, streamlined curves of the skeletonized bridges encircling the barrel, the great wheel and the tourbillon radiate to the end of the manual winding caliber.

This exceptional and architectural caliber can withstand accelerations of over 5,000 g’s.

BRIDGES MADE OF GRADE 5 TITANIUM

RM 12-01

FAST-ROTATING BARREL (6 hours per revolution instead of 7.5 hours)

This type of barrel has 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.

FREE-SPRUNG BALANCE WITH VARIABLE INERTIA

A free-sprung balance with variable inertia and a terminal-curve spring better reliability in the event of shocks, movement assembly or disassembly, and guarantees better chronometric results over time.

MOVEMENT CHARACTERISTICS

Movement dimensions: 28.12 x 23.43 mm
Thickness: 7.35 mm
Tourbillon diameter: 12.30 mm
Balance diameter: 10.00 mm
Jewels: 19
Balance: Glucydur®, with 2 arms and 4 setting screws, moment of inertia: 11.50 mg•cm2, angle of lift 53°
Frequency: 3 Hz (21,600 vph)
Balance spring: elinvar by Nivarox®
Shock absorbers: Kif Elastor KE 160 B28
Barrel shafts: nickel-free Chronifer® (DIN x 46 Cr13 + S), with the following characteristics: stainless – non-magnetic – suitable for tempering.

MOVEMENT CHARACTERISTICS

CASE

The bezel and caseback of the RM 12-01 are made from Carbon TPT® and/ or Quartz TPT®, two exclusive materials with a unique appearance. Their remarkable surface displays a damascene appearance, as they are composed of multiple layers of parallel filaments obtained by dividing carbon fibres or silica threads.
The case, which is water-resistant to 50 metres thanks to two Nitrile O-rings, is assembled using 12 spline screws in grade 5 titanium and 316L stainless steel washers.

RM12-01_TPT-GOLD_34FRONT_BBcase2

TORQUE-LIMITING CROWN

This security system prevents accidental overwinding of the watch, the result of which can cause damage to the winding stem or extreme pressure on the barrel spring.

TLC12-01

Finishing

Movement

• Hand-polished bevelling
• Shot-blasted milled sections
• Stretched upper surfaces

Steel parts

• Shot-blasted surfaces
• Satin-brushed surfaces
• Hand-polished bevelling
• Long strokes
• Matt ‘brouillé’ strokes
• Long strokes on the sides
• Polished sinks

Wheels

• Diamond-polished sinks
• Circular decorations on the front surfaces
• Rhodium plating (before cutting the teeth)
• Minimal corrections applied to the wheels in order to preserve geometry and performance

Other features

BARREL PAWL WITH PROGRESSIVE RECOIL

This device permits an appreciable winding gain (circa 20%), especially during the start of winding. It also promotes the even distribution of the mainspring’s internal tension.

WINDING-BARREL TEETH AND CENTRE-WHEEL PINION WITH CENTRAL INVOLUTE PROFILE

The central involute profile of the winding-barrel teeth provides an optimal pressure angle of 20°, which promotes effective rotary motion and compensates for possible variations in the operation of the going train. This, in turn, 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 screws during assembly. These screws are therefore unaffected by physical manipulation during assembly or disassembly and age well.

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