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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 2/140 - 370 Nm
The Clutch of Competence
For virtually all categories of motorsport, ZF Race Engineering offers a broad portfolio of racing clutches. SACHS carbon clutches (RCC) are used from touring car and rally up to Formula 1. The product range benefits from top-tier technology proven in series such as Formula 1, Super GT and WRC.
Compact, lightweight, responsive: the RCC 2/140 carbon racing clutch from ZF Motorsport is designed for sprints, tight circuits and classes with limited installation space. The 140 mm diameter and the low system mass of just 1,69 kg, together with a moment of inertia of 0,00548 kg·m², enable rapid engine speed build-up, quick rev-matching and short shift windows.
A key advantage of this specification is the low release force of just 2.500 N. With the same pedal and hydraulic ratios, this reduces pedal effort, improves modulation at the limit and lowers the load on the release bearing. The result is a repeatable bite point with precise response, rated for up to 370 Nm transferable maximum engine torque.
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 2/140
- Maximum engine torque [Nm]: 370
- Release diameter [mm] : 38
- Release force [N]: 2.500
- Release travel [mm]: 4.0 +0.5
- Mass (weight) [kg]: 1.69
- Moment of inertia [kg·m²]: 0.00548
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's temperature window. A wear-resistant hard coating reduces friction and fit wear and increases service life.
Material: Carbon
Carbon excels in racing with high temperature capability, consistent friction across a wide operating window and fine modulation even at high disc temperatures. Its low density reduces inertia and drag; thermal conductivity supports rapid temperature stabilisation. Carbon/carbon friction pairs are gentle on mating parts and gearbox components - ideal for long stints and repeated starts.
Hub Profile
RCC 140 carbon racing clutches are supplied as complete assemblies precisely matched to the respective gearbox input shaft. This ensures highest fit accuracy, reliable torque transfer and maximum durability in demanding motorsport use. Additional spline sizes and tailored solutions for specific vehicles are available on request.
Scope of Delivery
RCS 140Y clutch cover (HA140), aluminium
2 × RCS 140Y carbon drive plates
3 × RCS 140Y carbon pressure plates
1 × RCS 140Y hub, steel
1 × RCS 140Y base plate, steel
1 × RCS 140Y 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-tier racing flows directly into the development of carbon racing clutches. State-of-the-art manufacturing methods, the highest quality standards and motorsport technologies make carbon clutches the first choice for maximum performance and reliability - on circuit racing as well as in rally, formula and endurance applications.
Applications
CIRCUIT / TOURING
Super GT,
ELMS, DTM, STCC, NLS, TCR, GT World Challenge etc.
FORMULA
Formula Ford,
Formula 3, Formula 4 (RCC 115/140)
PROTOTYPES
Sports prototypes,
formula vehicle design, IndyCar etc.
RALLY
GT2 European Series,
WRC, ELMS, DRM, BRC, FRC etc.
Partners of ZF Race Engineering
