| 发明名称 |
Wheel-support rolling bearing unit and a method manufacturing the same |
| 摘要 |
<p>A cylindrical portion 10 is not quenched, and its hardness of a cylindrical portion 10 is set at Hv200 to 300. An average cross sectional area of the crystal particle in this portion is set to be within 0.03mm<2>. Accordingly, when a caulking portion is formed by expanding the cylindrical portion 10b to an inner ring 3 to a hub 2b made of carbon steel, cracks or the like are not formed in the resultant caulking portion. <IMAGE></p> |
| 申请公布号 |
EP1110756(A2) |
申请公布日期 |
2001.06.27 |
| 申请号 |
EP20000127542 |
申请日期 |
2000.12.15 |
| 申请人 |
NSK LTD |
发明人 |
ISHIDA, HIROHIDE;MIYAZAKI, HIROYA |
| 分类号 |
B23P11/00;B60B27/00;F16C19/18;F16C43/04;(IPC1-7):B60B27/00 |
主分类号 |
B23P11/00 |
| 代理机构 |
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代理人 |
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| 主权项 |
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