SACHS 883182000051 Motorsport Concentric Slave Cylinder
Hydraulic SACHS motorsport release unit (CSC) for push-type racing clutches with 49 mm release diameter.
The SACHS motorsport concentric slave cylinder 883182000051 from ZF Motorsport is a hydraulic concentric slave cylinder (CSC) developed specifically for racing and designed for SACHS racing clutches with push-type clutch actuation. The CSC is positioned concentrically around the gearbox input shaft and actuates the clutch directly via the integrated release bearing.
Version 883182000051 combines a 49 mm release diameter with 12 mm stroke, a defined mounting geometry and a one-piece housing. The housing is designed for high strength, sealing reliability and repeatable operation under motorsport conditions.
In addition to SACHS RCS racing clutches, this motorsport CSC can also be used in racing applications with motorsport clutches from other manufacturers such as Tilton or AP Racing, provided the technical setup is suitable. Release diameter, stroke, installation height, mounting pattern, centring and hydraulic actuation system must match the respective clutch and bellhousing.
With its release diameter matched to racing clutches, special surface coating, friction-optimised sealing system and increased hydraulic volume, this motorsport release unit supports precise clutch actuation, reduced pedal force and a repeatable pedal feel in racing use.
Version 883182000051
Component: motorsport CSC / concentric slave cylinder
Actuation: hydraulic, push-type clutch actuation
Release diameter: 49 mm
Working range: 12 mm stroke
Hydraulic cross-sectional area: 820.7 mm²
Housing: one-piece design for high strength and reduced leakage risk
Compatibility: for SACHS RCS racing clutches and, with suitable design, also for racing clutches from other manufacturers such as Tilton or AP Racing
Special feature: special coating and friction-optimised sealing system for precise actuation
Note: The SACHS RCS motorsport CSC 883182000051 is selected according to release diameter, stroke, mounting pattern, centring diameter, hydraulic volume and available installation space. For racing clutches from other manufacturers, diaphragm spring geometry, release bearing contact, installation height and hydraulic system must also be checked technically.
Benefits
One-piece housing for high strength and reduced leakage risk
Release bearing designed for high racing-engine speeds
Special coating to reduce friction within the system
Friction-optimised sealing system for consistent operation and repeatable pedal feel
Increased hydraulic volume to reduce pedal force at high release forces
Compact design for tight installation spaces in the bellhousing and motorsport driveline
Also suitable for motorsport driveline systems with Tilton or AP Racing clutches, provided geometry, stroke and hydraulics match the application
Technology
CSC 883182000051
Function: The SACHS RCS motorsport CSC 883182000051 sits concentrically around the gearbox input shaft and actuates the clutch directly via the release bearing. This allows release travel, bearing position and actuation force to be matched precisely to the respective racing clutch.
Design: This version has a 49 mm release diameter and a 12 mm stroke. The axial working positions are defined as X = 43.8 mm in the retracted position and Y = 55.8 mm in the extended position.
Cross-manufacturer application: Use is not limited exclusively to SACHS racing clutches. With Tilton, AP Racing or other racing clutches, compatibility must be checked via release diameter, diaphragm spring contact, required stroke, installation height, centring, mounting pattern and hydraulic ratio.
Housing: The housing is designed as a one-piece component. This construction supports high strength, sealing reliability and repeatable operation at high release forces, under vibration and thermal load in motorsport.
Bearing: The release bearing is designed for high racing-engine speeds. It enables stable clutch actuation during rapid load changes, short gearshifts and high mechanical loads.
Friction & sealing: A special coating and a friction-optimised sealing system support smooth CSC actuation. This improves modulation, pedal feel and repeatability in racing use.
Hydraulics: Racing clutches usually work with higher release forces than standard clutches. The SACHS CSC 883182000051 developed for racing has increased hydraulic volume and a hydraulic cross-sectional area of 820.7 mm² to reduce pedal force for the driver. Master cylinder, pedal travel, line routing and hydraulic volume must still be matched precisely to the vehicle, gearbox and clutch.
Geometry & dimensions
Mounting geometry 883182000051
The SACHS RCS CSC 883182000051 has a specific mounting geometry that clearly defines fastening, centring, release diameter and axial working range. Dimensions A, B, C, D, E, F, K, X and Y refer to the SACHS CSC geometry drawing for this version.
A: 74 mm bolt circle of mounting holes
B: 33.5° angular position of mounting holes
C: 10° angular position of mounting holes
D: 97° angular position of mounting holes
E: 49 mm release diameter
F: 6.6 mm diameter of mounting holes
K: 58.99 mm centring diameter
X: 43.8 mm CSC in retracted position
Y: 55.8 mm CSC in extended position
Fastening and centring geometry
Mounting geometry: Version 883182000051 uses a mounting pattern with A = 74 mm, B = 33.5°, C = 10°, D = 97°, F = 6.6 mm and K = 58.99 mm. Fastening, centring and installation position of the CSC are therefore clearly defined. Release diameter E is 49 mm; the axial working positions are X = 43.8 mm and Y = 55.8 mm.
Technical data
All relevant dimensions and technical features of the SACHS motorsport CSC 883182000051 in a single overview.
| Part number | A (mm) |
B (°) |
C (°) |
D (°) |
E (mm) |
F (mm) |
K (mm) |
X (mm) |
Y (mm) |
Stroke |
|---|---|---|---|---|---|---|---|---|---|---|
| 88 3182 000 051 | 74 | 33.5 | 10 | 97 | 49 | 6.6 | 58.99 | 43.8 | 55.8 | 12 mm |
Installation notes
Installation & design
Installation height: Before installation, the retracted and extended CSC positions must be checked with clutch, flywheel and gearbox. For part number 883182000051, the axial reference dimensions are X = 43.8 mm and Y = 55.8 mm.
Release diameter: The 49 mm release diameter must match the respective SACHS RCS racing clutch or a technically suitable racing clutch from another manufacturer. Selection must not be based on package space alone; it has to be coordinated with the clutch version and release system.
Mounting pattern: This version uses A = 74 mm, F = 6.6 mm and K = 58.99 mm. Mounting holes, centring and line routing must be compared with the bellhousing before installation.
Compatibility check: With Tilton, AP Racing or other racing clutches, release diameter, diaphragm spring contact, required stroke, minimum clearance, installation height, stop limitation, hydraulic ratio and return behaviour must be checked conclusively before use.
Pedal force & master cylinder: The increased hydraulic volume of the CSC can reduce pedal force at high release forces. Actual pedal force, however, depends on master-cylinder diameter, pedal ratio, line volume, clutch version and bleeding condition.
Hydraulics: Pedal travel, master cylinder, line routing and hydraulic volume must be matched to the vehicle and clutch. Complete bleeding is required for consistent operation, defined pedal force and repeatable pedal feel.
Service: Bearing, sealing system, contact faces and guide should be inspected regularly. In the event of leakage, wear, stiff actuation or implausible pedal travel, the motorsport release unit must be assessed together with the clutch and hydraulic system.
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