Device for supplying a medium to a servo device, wherein the device comprises a first component supported in a fixed housing and a second rotary-driven second component, which are assembled to form a distributor block which can be flanged onto the servo device, wherein the first component is arranged to be axially displaceable in the housing and the position of the first component is adjustable by means of lateral sealing gaps (33, 34), which can be influenced by an annular chamber (31, 32) provided between the two components (11, 21), wherein the first component is composed of two annular discs (12, 13) surrounding an annular chamber and which are designed to be symmetrical to one another and arranged at a small lateral distance from one another, which annular discs (12, 13) are connected respectively to a supply line (3, 4) for the medium and connectable respectively to one of the pressure chambers (106, 107) of the servo device which can be supplied on both sides, wherein the two annular discs (12, 13) are mounted to be displaceable on at least two bolts (15, 16) supported on the housing to be displaceable by the gap width of a sealing gap (33, 34) and wherein respectively flow channels (17, 18) connected to the supply lines (3, 4) and connectable to the pressure chambers (106, 107) are incorporated in the bolts (15, 16), wherein the second component is designed in one piece as a ring and is arranged on a hollow shaft which is attachable to a cylinder of the servo device by means of screws, wherein the first component is supported in the housing by a disc and a cover, which is attached to the housing by screws wherein the second component is retained on the hollow shaft by means of discs (25, 25') and the screws, wherein in order to always ensure adequate lubrication in the whole distributor block, each annular chamber (31, 32), which are supplied by the through-flowing medium and which are connected to pressure chambers (35, 36), is provided between the two annular discs (12, 13) of the first component and the second component, wherein the sealing gaps (33, 34), which are limited by sealing surfaces (37, 38) attached to the annular discs (12, 13) and support surfaces (39, 40) integrally moulded on the hollow shaft or the disc, are assigned to the pressure chambers (35, 36), wherein if transfer of pressurised medium takes place, the annular discs (12, 13) which are designed to be symmetrical to one another are supplied in the annular chambers (31, 32) and the pressure chambers (35, 36) and also in the annular chamber, so that the annular discs (12, 13) are displaced outwards and the sealing gaps (33, 34) are formed between the sealing surfaces (37, 38) and the support surfaces (39, 40), wherein the annular discs (12, 13) are thus retained in a suspended state so that, for cooling and lubrication of bearings (27, 28) and sealing rings (29, 30) provided laterally next to the first component, pressurised medium is likewise supplied, wherein the annular chamber provided between the two annular discs (12, 13) is connected to the bearings (27, 28) and seals (29, 30) arranged laterally next to the annular discs (12, 13), wherein to connect the annular chamber with the laterally arranged bearings (27, 28) and seals (29, 30), a tube piece, in which one or more openings in the form of slots, holes or the like are incorporated in the region of the annular chamber, is inserted in the two annular discs (12, 13).