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 RCS 140 S7.8 Sinter Pad Clutch Disc
Sinter pad clutch disc for modular SACHS RCS 140 racing clutches
The SACHS RCS 140 S7.8 sinter pad clutch disc is developed for modular SACHS RCS 140 multi-plate racing clutches. It combines the compact 140 mm diameter with 7.8 mm lining thickness and high thermal load capacity for demanding motorsport applications.
The RCS 140 format is designed for low rotating mass, fast response and compact installation space. This S7.8 version adds high friction material volume and increased wear reserve to the compact base layout, making it a robust clutch disc with sintered metal friction pads for intensive use.
The 7.8 mm lining thickness supports consistent performance during repeated starts, high friction work and longer load phases. This makes the S7.8 disc especially suitable where a durable, temperature-stable driven plate is required despite the small clutch size.
Depending on the RCS 140 configuration, the SACHS RCS 140 S7.8 clutch disc with sintered metal friction pads is available with different hub profiles as well as the hub lengths medium 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 racing clutch
Component: clutch disc / driven plate
Friction material: sintered metal friction pads brazed to carrier plate
Lining thickness: 7.8 mm
Version: rigid clutch disc
Medium hub length: RCS 140-S7.8-M-XXX
Long hub length: RCS 140-S7.8-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 S7.8 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
Compact 140 mm design with high wear reserve
7.8 mm lining thickness for high friction material volume and long service life
Greater thermal reserve than thinner friction pad versions
High torque capacity with compact racing clutch design
Direct power transmission and clear engagement behaviour in motorsport use
Suitable for repeated starts, high friction work and demanding operating conditions
Available with medium 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 7.8 mm
The SACHS RCS 140 S7.8 sinter pad clutch disc is designed for high friction work, direct power transmission and thermal load capacity in motorsport. The sintered metal friction pads metallically bonded to the carrier plate enable durable friction behaviour at high temperatures and during repeated load changes.
The 7.8 mm lining thickness provides a large wear reserve within the compact RCS 140 assembly. This specification is suited to operating profiles where the small 140 mm clutch format must be combined with extended service life and thermal reliability.
Compared with thinner friction pad versions, the S7.8 focuses on durability over the service period. The disc remains part of a very compact RCS 140 system, but provides significantly more reserve for intensive racing and motorsport conditions.
Hub & hub length
The SACHS RCS 140 S7.8 sinter pad clutch discs 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 medium and long are available. The medium version is listed as RCS 140-S7.8-M-XXX, the long version as RCS 140-S7.8-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.
The combination of compact 140 mm format and 7.8 mm lining thickness provides a robust technical basis for racing clutches where small dimensions, direct response and increased wear reserve are 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 high thermal reserve are required.
Endurance racing
The 7.8 mm sinter pad version is suitable for applications where increased wear reserve and consistent function over longer load phases are required within a compact 140 mm clutch system.
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 high durability is required. The RCS 140 S7.8 combines small dimensions with robust sinter pad technology and high material reserve.
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