A rotatable device, such as a pulley, includes an annular rotatable member having a bore extending therethrough and an outer surface disposed about the bore. A bearing is located in the bore. The bearing is operably connected to the annular rotatable member to form an axis of rotation about which the annular rotatable member can rotate relative to an inner race of the bearing. A combination dust cover and bearing retaining member spans the bore at a location spaced axially from the bearing. The cover includes a flange received by a groove extending outwardly from the bore in a direction toward the outer surface of the rotatable member to attach the combination dust cover and bearing retaining member to the rotatable member.