disk 18 rotates in the work chamber 12 the drive disk is fixedly joined for rotation with the drive member 1 and forms a front working gap 13 and a rear working gap 14 with the clutch housing 3 wherein the front working surface 19 and the rear working surface 20 are plane parallel to the drive disk 18 as are the opposing working surfaces of the clutch housing 3 in the radially inside area of the two working gaps 13 and 14 i e in the inlet area an overflow orifice 23 is provided in the drive disk 18 in the form of a bore a circumferential annular groove 21 having the same radial position with respect to the axis of rotation of the clutch as the bore 23 is machined into the front side 19 of the drive disk 18 a further annular groove 22 is machined in a similar manner into the rear side 20 of the drive disk 18 again with a radial position corresponding to that of the bore 23 with respect to the axis of rotation of the clutch the annular grooves 21 and 22 are thus connected by means of the transverse bore 23 as may be seen in particular in fig2 and 4 a cylindrical baffle 25 is arranged offset in the circumferential direction with respect to the bore 23 in the annular groove 21 the baffle 25 completely fills the rectangular cross section of the annular groove 21 the cylindrical baffle 25 is fixedly pressed into a corresponding receiving bore 26 in the drive disk 18 and terminates flush with the front working surfaces 19 of the drive.