Abstract: A radial non-contact lip (26) having a tip edge that is positioned further radially inward than is the inner peripheral surface at an axial end of an inner ring (7) is formed on the inner peripheral edge of a seal ring (20) that axially faces a flange part (18a) constituting a bearing holder (3a), the seal ring (20) being one of a pair of seal rings (20, 9b) that close the openings at the two axial ends of a release bearing (2a). A labyrinth seal (30) is formed, between the axial-side surface of the radial non-contact lip (26) and the axial end surface of the inner ring (7), radially inward from a sliding contact part (40) between the tip edge of a contact lip (12a) and the axial inner end surface of the inner ring (7).

Abstract: A radial non-contact lip (26) having a tip edge that is positioned further radially inward than is the inner peripheral surface at an axial end of an inner ring (7) is formed on the inner peripheral edge of a seal ring (20) that axially faces a flange part (18a) constituting a bearing holder (3a), the seal ring (20) being one of a pair of seal rings (20, 9b) that close the openings at the two axial ends of a release bearing (2a). A labyrinth seal (30) is formed, between the axial-side surface of the radial non-contact lip (26) and the axial end surface of the inner ring (7), radially inward from a sliding contact part (40) between the tip edge of a contact lip (12a) and the axial inner end surface of the inner ring (7).

Abstract: A seal for sealing between the inner ring and outer ring of the clutch release bearing comprising a labyrinth seal section extending from one of the inner ring and outer ring and kept in a non-contact state with reference to the other ring, and a contact seal section comprising a lip portion and provided on the internal side of the labyrinth seal and kept in a contact state with reference to the other ring, and the lip portion acting to obstruct semi-fluidized foreign matter which enters through the labyrinth seal.

Abstract: A seal for sealing between the inner ring and outer ring of the clutch release bearing comprising a labyrinth seal section extending from one of the inner ring and outer ring and kept in a non-contact state with reference to the other ring, and a contact seal section comprising a lip portion and provided on the internal side of the labyrinth seal and kept in a contact state with reference to the other ring, and the lip portion acting to obstruct semi-fluidized foreign matter which enters through the labyrinth seal.