| 摘要 |
PROBLEM TO BE SOLVED: To finish a radial bearing face with high accuracy and to prevent the leakage of lubricant in manufacturing a cylindrical radial bearing component by forming a small part for radially supporting a shaft and a large part for receiving a disc-shaped thrust bearing component, further forming a dynamical pressure groove on an inner peripheral face of the small part, and inserting a rigid ball from the large part to the small part to eliminate weld flash and a raised part of the small part to unify an inner diameter. SOLUTION: An inner diameter of a dynamical pressure groove formation part 5B is determined to be smaller than a required value by a predetermined value in boring the small part 4, the dynamical pressure groove 5 is formed deeper than a required value by a predetermined value, and the rigid ball 6 having a predetermined outer diameter larger than the inner diameter of the formed dynamical pressure groove formation part 5B, is inserted into the small part 4. COPYRIGHT: (C)2004,JPO
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