Machine assembly and sealing unit for this purpose

The present invention first relates to a seal unit for sealing a first machine element (03) relative to a second machine element (07), said first machine element (03) relative to the second machine element (07) is rotatable. The invention further relates to a machine element arrangement with the inventive sealing unit. The sealing unit comprises a sealing washer (01) made of an elastic plastic. The sealing disk (01) has to be arranged one on the first machine element (03) sealing seat (02) and a circumferential sealing lip (04) which is adapted, arranged on a at the second machine element (07) counter-sealing surface (06) to come to bear. a plurality of centrifugal elements (08) are embedded in accordance with the invention the sealing disc (01) having a density greater than a density of the plastic.