| 摘要 |
PROBLEM TO BE SOLVED: To elongate the service life of a rolling bearing by preventing the damage such as peeling and separation of a rolling surface under a condition of very small amount of oil or shortage in lubrication. SOLUTION: In this thrust needle roller bearing provided with a plurality of needle rollers between an inner ring 2 and an outer ring 4, very small voids are formed on the roller rolling surfaces, contact parts are finished smooth, and an average value (JIS B0601:2001Rq, Rp, JIS B0671-2, 3:2002Rvk) obtained by calculating a square root height of outline curve Rq (μm), the maximum crest height of outline curve Rp (μm), and a projecting trough depth Rvk (μm) by every standard length, satisfies the relationship of Rvk≥0.3, and Rp/Rq≤1.4 on the rolling surface. COPYRIGHT: (C)2004,JPO&NCIPI
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