Axlevara · category range
Hydraulic release bearings
Hydraulic clutch release bearings of the concentric slave cylinder type, supplied by cross-reference. 156 catalogue listings; the hydraulic counterpart to the mechanical range.
- Range
- Hydraulic release bearings, CSC type
- Catalogue
- 156 listings in the published catalogue
- Reference
- Concentric slave cylinder is the same part
The bearing and the cylinder in one unit
A hydraulic release bearing combines the release bearing and the hydraulic slave cylinder in a single unit mounted concentrically around the gearbox input shaft. Pressing the pedal pressurises the unit and the bearing face advances against the diaphragm spring — no fork, no pivot, no external cylinder.
The trade name for the same unit is the concentric slave cylinder, often shortened to CSC. Orders placed under that name are matched to this family: the catalogue's hydraulic release bearings and the CSC are one range, not two.
The published range
The catalogue carries 156 listings of hydraulic release bearings, against 310 for the mechanical family — a fair reflection of the vehicle parc, where the hydraulic unit dominates newer cars and the mechanical bearing holds the older parc. Both families are ranged so a distributor can cover the clutch shelf from one catalogue.
| Check | Mechanical | Hydraulic |
|---|---|---|
| Release fork visible | Yes | No fork fitted |
| Hydraulic line to the bell housing | No | Yes |
| Slave cylinder location | External, on the fork | Inside, around the input shaft |
Ordering notes for CSC units
A CSC is ordered by application and cross-reference, and the hydraulic connection matters: line fittings differ between applications that otherwise look alike. Where an inquiry quotes a CSC number, it is matched against this family only — not against standalone clutch cylinders, which are a different part and not part of this catalogue family.
Replacement practice
Because the CSC sits inside the bell housing, it is routinely replaced with the clutch itself, and distributors selling clutch jobs are the natural buyers of this family. The throwout-bearing symptoms guide covers the noise and pedal-feel checks that lead to a CSC order.
The release bearing families
Clutch Release Bearings (Mechanical)
The mechanical counterpart family