There are two types of hydraulic clutch bearings or hydraulic release bearings, which are:

    Concentric Slave Cylinder (CSC): In a CSC hydraulic clutch bearing, the release bearing is located inside the transmission bell housing and is concentric with the input shaft. The CSC system is more compact than the traditional clutch fork and releases bearing setup, and it is commonly used in modern vehicles with hydraulic clutch systems.

    External Slave Cylinder (ESC): In an ESC hydraulic clutch bearing, the release bearing is located outside the transmission bell housing and is connected to the clutch fork by a pushrod. The ESC system is typically used in older vehicles and is less compact than the CSC system.

    Both types of hydraulic clutch bearings operate using the same basic principle: pressurized hydraulic fluid is used to move the release bearing, which then disengages the clutch. However, the design and location of the release bearing can vary depending on the type of system used.