ROLLING BEARING

摘要

The tip end of seal member main body (8) comprises a seal lip portion (9) which comes into contact with an inner ring (1). The cross-sectional shape of the seal lip portion (9) has a V-shaped curved shape which curves, at a lower section constituting an intermediate portion in the radial direction, in such a way that a relief concave portion (13) is produced at the external side of a bearing space, and said cross-sectional shape is a tapered shape in which a protruding portion (12) close to the tip end side than the lower section becomes increasingly narrow toward the tip end. The seal member (5), when inserted in a bearing, applies a pressing force to the inner ring (1) against the displacement of interference of the protruding portion (12). The protruding portion (12) is formed of an easily worn material which exhibits a light degree of contact by which, when the bearing is used in a state of rotation, the protruding portion (12) is worn so as to be non-contact or to have a contact pressure of zero.