A bearing eye for a tensioning system used in flexible drives. For sealing an annular gap between a fixedly positioned support part and a longitudinal bore of the bearing eye a sealing element is provided which encompasses two radially aligned sealing lips. To this end, in the installed state, the sealing lip is respectively supported on a support disc positioned on the support part and the corresponding further sealing lip is supported on a wall of the bearing eye in the region of the installation space.