English
Description
Manufacturer
Product Tags
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 3/140 - 4/140
The Clutch of Competence
Two variants, one goal: maximum performance with minimal rotating mass. The RCC 3/140 and RCC 4/140 in the 140‑mm format enable rapid rev matching, precise modulation and high durability - ideal for sprint distances, tight circuits and classes with limited installation space.
RCC 3/140: 2,17 kg system weight and a moment of inertia of 0,00687 kg·m² reduce drag losses and shorten shift windows. With up to 1.000 Nm transferable torque and 4.900 N release force, the triple‑plate setup offers a balanced combination of torque capacity and fast, repeatable actuation.
RCC 4/140: four friction plates increase torque density with a compact stack height. 2,44 kg system weight and 0,00768 kg·m² MoI support immediate engine speed build‑up; the configuration transmits up to 1.330 Nm at 4.800 N release force - suited for high‑power touring cars, prototypes and demanding circuit setups.
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
Clutch Cover (Housing)
High‑strength forged aluminium, engineered for maximum stiffness at minimum weight. The housing geometry promotes heat dissipation and stabilises the temperature window of the clutch pack. A wear‑resistant hard coating reduces friction and fit wear and increases service life.
Material: Carbon
Carbon delivers high temperature resistance, consistent friction over a broad working range and progressive, easily modulated response - even at elevated disc temperatures. The low density reduces inertia and drag; thermal conductivity supports quick temperature stabilisation. Carbon/carbon pairs are gentle on mating surfaces and gearbox components - ideal for long stints and repeated starts.
Hub Profile
RCC 140 carbon racing clutches are delivered as complete assemblies precisely matched to the respective gearbox input shaft. This ensures maximum fit accuracy, reliable torque transfer and durability in racing. Additional spline sizes and vehicle‑specific solutions are available on request.
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 construction, IndyCar etc.
RALLY
GT2 European Series,
WRC, ELMS, DRM, BRC, FRC etc.
Partners of ZF Race Engineering
