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.
Racing Clutch Disc SACHS RCS 140 S5.2
Sinter pad clutch disc for modular SACHS RCS 140 racing clutches
The SACHS RCS 140 S5.2 clutch disc with sintered metal friction pads is developed for modular SACHS RCS 140 multi-plate racing clutches. It combines the very compact 140 mm diameter with 5.2 mm lining thickness, offering a balanced solution for motorsport applications where low rotating mass and a durable friction material reserve need to work together.
The RCS 140 format is designed for fast response, compact installation space and low mass moment of inertia. The S5.2 version adds more material reserve than thinner RCS 140 sintered versions, while remaining more responsive than a 7.8 mm clutch disc.
The 5.2 mm lining thickness is suitable for operating profiles with repeated starts, dynamic load changes and high friction work, while retaining the direct response of the compact clutch system. This positions the RCS 140 S5.2 as a technically versatile variant between maximum agility and increased service life.
Depending on the RCS 140 configuration, the SACHS RCS 140 S5.2 sinter pad clutch disc is available with different hub profiles as well as the hub lengths extra short and long. Selection is made to match the intended hub length, the ZF gearbox code of the gearbox input shaft and the approved combination within the RCS 140 clutch pack.
Versions
System: SACHS RCS 140 multi-plate racing clutch
Component: clutch disc / driven plate
Friction material: sintered metal friction pads brazed to carrier plate
Lining thickness: 5.2 mm
Version: rigid clutch disc
Extra-short hub length: RCS 140-S5.2-E-XXX
Long hub length: RCS 140-S5.2-L-XXX
XXX: placeholder for the ZF gearbox code of the gearbox input shaft or the respective hub profile
Note: The correct SACHS RCS 140 S5.2 sinter pad clutch disc is selected according to RCS 140 clutch configuration, hub length, ZF gearbox code, hub profile and approved combination within the clutch pack.
Benefits at a glance
Very compact 140 mm design with direct response
5.2 mm lining thickness as a balance between agility and material reserve
More wear reserve than thinner RCS 140 sintered versions
More responsive than 7.8 mm versions
High torque capacity with compact clutch design
Suitable for repeated starts, dynamic load changes and high friction work
Available with extra-short and long hub length for different RCS 140 configurations
Suitable for modular SACHS RCS 140 racing clutches from ZF Motorsport
Technology
Sintered metal friction pads 5.2 mm
The SACHS RCS 140 S5.2 sinter pad clutch disc is designed for high friction work, direct power transmission and thermal load capacity in motorsport. The sintered metal friction pads are brazed to the carrier plate and engineered for durable friction behaviour at high temperatures and during repeated load changes.
The 5.2 mm lining thickness offers a practical balance within the compact RCS 140 system: more reserve than thinner sintered versions, but lower rotating mass than a 7.8 mm clutch disc. This keeps the clutch system highly responsive while making it more robust for intensive operating profiles.
Thanks to the combination of 140 mm design and S5.2 specification, this product group is especially suitable for motorsport vehicles where compact packaging, fast shifts and solid thermal reserve are required together.
Hub & hub length
The SACHS RCS 140 S5.2 clutch discs with sintered metal friction pads are available with vehicle-specific hub profiles matched to the respective gearbox input shaft. The correct hub profile is essential for precise fitment, clean power transmission and operational reliability in motorsport.
For this product group, the hub lengths extra short and long are available. The extra-short version is listed as RCS 140-S5.2-E-XXX, the long version as RCS 140-S5.2-L-XXX. XXX represents the ZF gearbox code of the gearbox input shaft or the respective hub profile.
When replacing a worn clutch disc, the existing hub length version of the SACHS RCS 140 clutch must be retained exactly. For new builds, conversions or individual assembly of an RCS 140 clutch pack, only the factory-approved hub length combinations for the respective clutch configuration may be used.
RCS 140 system
As part of the modular SACHS RCS 140 clutch system, the driven plate is combined with approved pressure plates, intermediate plates and clutch covers. The components must be selected to match the number of discs, lining thickness, installation height and the respective RCS 140 configuration.
Depending on the approved clutch setup, the S5.2 version can be used in different multi-plate configurations. This makes it suitable for compact racing clutches where high torque capacity, direct response and a balanced material reserve need to be combined.
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 racing / touring cars
Suitable for compact circuit racing and touring car applications where small dimensions, direct power transmission and fast response are key priorities.
Sprint & hill climb
The 5.2 mm sinter pad version is suitable for vehicles where low mass moment of inertia, fast engine response and durable power transmission need to be combined.
Rally / rallycross / autocross
Robust clutch disc for changing grip conditions, high load changes, repeated starts and demanding conditions on asphalt, gravel or mixed surfaces.
Performance conversions
Suitable for high-performance conversions and motorsport vehicles where a very compact clutch system with direct response and solid wear reserve is required. The RCS 140 S5.2 combines small dimensions with responsive sinter pad technology and a practical material reserve.
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