Patent ID: 8202006

Claim:
A sealing device comprising: a metal core which is fixed to and around a first bearing ring and has a radially extending portion extending in a radial direction of the first bearing ring; a slinger having a cylindrical fixation section fixed to and around a second bearing ring and a flange section which extends in the radial direction from the fixation section and is positioned more outside in an axial direction of the second bearing ring than the radially extending portion of the metal core; and an elastic member having a base fixed to the radially extending portion of the metal core and a lip section which is connected with the base and is slidable on the slinger, wherein the lip section comprises: a first axial lip which extends from the base toward the first bearing ring in the radial direction and outward in the axial direction and is slidable on the flange section, and a second axial lip which is positioned radially on the second bearing ring side of the first axial lip at a distance in the radial direction from the first axial lip and is slidable on the flange section; wherein the second axial lip comprises: a first portion which extends from the base toward the second bearing ring in the radial direction and outward in the axial direction, and a second portion which extends from an axially outer end of the first portion toward the first bearing ring in the radial direction and outward in the axial direction and is slidable on the flange section; wherein in a state before the elastic member is assembled to the slinger, a surface that the first portion has on the second bearing ring side in the radial direction is a concave surface, while a surface that the second portion has on the second bearing ring side in the radial direction is a conical surface or a convex surface; wherein in a state after the elastic member has been assembled to the slinger, the second axial lip is positioned at a distance in the radial direction from the fixation section of the slinger while the second axial lip is in a non-worn state, and part of a portion facing the fixation section of the slinger of the second axial lip is slidable on the fixation section of the slinger while the second axial lip is in a worn state and in a state that pressing force against the flange section of the second axial lip has decreased by a predetermined amount or more due to wear of the second axial lip; and wherein force to be received by the second axial lip is only force from the slinger.