| 摘要 |
PROBLEM TO BE SOLVED: To provide a thrust needle roller bearing capable of lengthening the service life, and capable of also reducing weight, by restraining abrasion and seizure by a shortage of an oil film in high speed rotation. SOLUTION: This thrust needle roller bearing 10 has a cage 15 penetrating in the axial direction and having a plurality of pockets 14 formed over in the circumferential direction, and a plurality of needle rollers 13 held to roll in the circumferential direction in the plurality of pockets 14. A recessed part 13d is formed on the end surface side of the needle rollers 13. COPYRIGHT: (C)2009,JPO&INPIT
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