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Designed to make a
difference
ZF Race Engineering's SACHS motorsport clutches have stood for top-tier quality in international racing for decades. The ambition: continuous improvement and the drive to keep pushing the limits. From the lightest clutch used in Formula 1 to proven twin-plate and multi-plate systems in WRC, DTM, NASCAR, Le Mans and the Dakar Rally - ZF Motorsport technology is a core component of many winning cars worldwide.
SACHS Carbon Racing Clutch
RCC 3/184
The Clutch of Competence
For nearly all categories of motorsport, ZF Race Engineering offers a wide portfolio of clutches. SACHS carbon clutches (RCC) are used from touring car and rally to Formula 1. The entire ZF Motorsport range benefits from top-tier technology proven in series such as Formula 1, SuperGT and WRC.
Development focus: minimal diameter, lowest weight and moment of inertia - combined with maximum temperature resistance and consistently high performance.
The RCC 3/184 carbon clutch meets the tough demands of modern motorsport. Robustness and reliability meet uncompromising competitiveness - enabled by excellent mass and inertia characteristics.
Proven in many race-tested drivetrains, the RCC 3/184 delivers high thermal stability. This makes the racing clutch suitable beyond the racetrack and reliably cushions operating errors.
Maximum service life
For the carbon clutches, pressure plate and shim packs are available to compensate carbon wear. With these compensating pressure plates, the clutch can be reset to as-new condition - significantly extending its service life.
Every unit undergoes stringent quality checks and is individually tested and measured before delivery. Preload force, installation height and release characteristics are documented. The pre-installed carbon stack thickness is also recorded - the enclosed document supports maintenance and the shimming process (compensation pressure plates for refurbishment).
Benefits
maximum thermal resilience - carbon quality from Formula 1
very low weight and minimal moment of inertia
smooth and comfortable launch behavior
no flywheel wear
extreme durability - up to 4x longer than conventional sintered racing clutches
Lowest mass
One of the major strengths of a carbon racing clutch is its low mass and the resulting low moment of inertia.
They are designed for the lowest possible mass with the goal of transferring engine torque to the gearbox as quickly and directly as possible.
Lightening measures in the cranktrain that reduce the moment of inertia increase vehicle acceleration noticeably in the lower gears.
Faster acceleration
If, for example, the clutch has a moment of inertia (Mtm) of 0,061 kgm2, with a gearbox ratio of 13,4:1 (first gear ratio) this acts at the drive wheel with 180 times the value (13,42). Converting Mtm into vehicle mass results in an additional weight of approx. 145 kg in 1st gear that must be accelerated.
Thanks to the extremely low inertia of the SACHS carbon clutch, shift times are significantly reduced and the vehicle accelerates faster.
Maximum service life
For carbon clutches there are pressure plate and shim packs available that compensate carbon wear. With these compensation pressure plates the clutch can be reset to as-new condition - significantly extending service life.
Each unit undergoes stringent quality checks and is individually tested and measured before shipment. Preload force, installation height and release characteristics are documented. The preinstalled carbon stack thickness is also recorded - the included document supports maintenance and the shimming process (compensation pressure plates for refurbishment).
The Technology
Technical data RCC 3/184
- Maximum engine torque [Nm]: 1.240
- Release diameter [mm]: 49
- Release force [N]: 4.300
- Release travel [mm]: 5.0 + 0.5
- Mass (weight) [kg]: 3.10
- Moment of inertia [kg·m²]: 0.011684
Clutch cover (housing)
High-strength forged aluminium, engineered for maximum stiffness at minimum weight. The housing geometry supports efficient heat dissipation and stabilises the clutch pack temperature window. A wear-resistant hard coating reduces friction and fit wear and increases service life.
Material: carbon
In racing use, carbon excels with high temperature resistance, stable friction over a wide operating window and finely modulatable response even at high disc temperatures. Low density reduces inertia and drag torque; good thermal conductivity promotes rapid temperature stabilisation. Carbon/carbon friction pairs are gentle on mating parts and gearbox components - ideal for long stints and repeated launches.
SACHS RCS hub
RCC 184 carbon clutches are supplied as complete assemblies matched to the respective gearbox input shaft. Additional spline sizes and tailored solutions for specific vehicles are available on request.
Scope of delivery
RCS 184Y clutch cover (HA184), aluminium
3 × RCS 184Y carbon intermediate plates
4 × RCS 184Y carbon pressure plates
1x RCS 184Y hub, steel
1x RCS 184Y base plate, steel
1x RCS 184Y pressure ring, steel
Quality Made in Germany
ZF Race Engineering has been among the technology leaders in motorsport for years. The combined know-how from top-level racing flows directly into the development of RCS racing clutches. State-of-the-art manufacturing methods, the highest quality standards and motorsport technologies make ZF Motorsport clutches the first choice for maximum performance and reliability - on circuits as well as in rallying, touring and endurance racing.
Applications
CIRCUIT / TOURING CARS
Super GT,
ELMS, DTM, STCC, NLS, TCR, GT World Challenge etc.
FORMULA
Formula Ford,
Formula 3, Formula 4 (RCC 115/140)
PROTOTYPES
Sports prototypes,
single-seater engineering, IndyCar etc.
RALLY
GT2 European Series,
WRC, ELMS, DRM, BRC, FRC etc.
Partners of ZF Race Engineering
