| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing which can inhibit a pressure increase in the bearing when a sealing device is press-fit.SOLUTION: A hub unit 1 includes: an outer ring 2 fixed to a knuckle 20 of a vehicle and having a raceway surface on a fix side; an inner ring 3 and an inner ring 4 having raceway surfaces on a rotation side; balls 5 arranged in annular spaces 10 between the outer ring 2 and both the inner ring 3 and the inner ring 4; and the sealing devices 7 and 8 arranged on both ends of the annular spaces 10 in the axial direction and sealing the annular spaces 10 to constitute a bearing internal space 6. At least one communication hole 9 for communicating between the bearing internal space 6 and a bearing external space 11 is formed in the outer ring 2, and the communication hole 9 is sealed by the knuckle 20. |
