| 摘要 |
It is an object of the invention to provide a sealing device for a water pump bearing which can ensure excellent seal performance although using an economical seal member that is not provided with an axial lip, and that has only a radial lip. In order to attain the object, the invention provides a sealing device 8 of the following configuration. The sealing device comprises: an annular seal member 81 which is fixed to a shoulder portion 41a of one end in an axial direction of an outer race 41 of a water pump bearing; and an annular slinger 82 which is positioned on a side of the one end in the axial direction with respect to the seal member 81 and externally fitted and fixed to the outer peripheral face of a pump shaft 1 serving as an inner race. The seal member 81 has a section shape which is bent along a disk portion 82a and an outer cylindrical portion 82c of the slinger 82. A labyrinth seal portion 83 is formed between the seal member 81, and the disk portion 82a and the outer cylindrical portion 82c of the slinger 82. Radial lips 81c and 81d are formed on an inner periphery of the seal member 81.
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