| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a thrust needle bearing which achieves long life even under adverse environments. <P>SOLUTION: In the thrust needle bearing 10, its surface hardness is specified between 400 and 600 in Vickers hardness Hv, thereby being capable of suppressing the early abrasion in the area R (shown in double hatching in Figure 2) having high surface pressure in particular. <P>COPYRIGHT: (C)2004,JPO</p> |
