In a graft to comandabile clutch hydraulic, with lamelle inner and external (7, 8), impegnantesi between they, lamelle inner (8) and the lamelle external (7) they are connected watertight for means of rings (20, 21) comprimibili ones axially, and the first and last lamella inner (32) are thickened and sluices to held regarding piston (25), respective case (2), and supported for means of bearings of push (33). Consequently in the event of highly viscous liquids susceptible packings of escapes for estate defect are avoided, with superficial of estate flowing axially, and it obtains a reliable closing to held and an improvement of the exercise behavior. (Figure 2).