| 摘要 |
<P>PROBLEM TO BE SOLVED: To stably enhance support capacity of a sintered bearing having an inner recess part. Ž<P>SOLUTION: This sintered bearing 1 is formed by sintering a green compact, and forms bearing surfaces 2 and 4 in two places separated in the axial direction of an inner peripheral surface, and has the inner recess part 3 forming an inside diametrical dimension of an area between bearing surfaces in a larger diameter than the bearing surfaces 2 and 4. The inner recess part 3 is formed in a predetermined shape in its whole by spring-back caused by releasing pressurizing force when molding the green compact. The inner recess part 3 and the first bearing surface 2, and the inner recess part 3 and the second bearing surface 4 have respectively crossing corner parts 3d and 3e. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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