| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a needle roller bearing capable of efficiently holding lubricating oil on a rolling surface by a limited lubricating oil quantity, without impairing retentivity to a needle-like roller. <P>SOLUTION: This needle roller bearing 10 is composed of a pair of annular parts 13 and a plurality of column parts 14 connecting the annular parts 13, and has a cage 11 forming a plurality of pockets 15 and a plurality of needle-like rollers 12 rollingly held by the pockets 15, and is formed by arranging a narrow width part 17 narrowing in width in the peripheral direction in the middle of the column parts 14. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
