| 摘要 |
A vehicle wheel bearing apparatus has an outer member, an inner member, double row balls freely rollably contained between the inner raceway surfaces and the outer raceway surfaces, respectively, of the inner member and the outer member. The inner ring is axially secured relative to the wheel hub by a caulked portion. A tapered auxiliary raceway surface is formed on the outer circumference of the inner ring near its inner raceway surface. A chamfered portion is formed between the outer circumference and the caulked end face of the inner ring. The chamfered portion has a circular arc cross-section. The radius of curvature of the circular arc cross-section of the chamfered portion is set within a range of R1.2-R3.0 mm. |
