| 摘要 |
PROBLEM TO BE SOLVED: To increase a service life even under any lubricating conditions such as a low viscosity severe lubrication, a foreign matter environment, and a clean oil lubrication. SOLUTION: An infinite number of micro recessed dents are formed at random at least in the surfaces of rolling elements, the surface roughness parameter Ryni of the surface in which the dents are formed is set within the range of 0.4μm≤Ryni≤1.0μm, and sk value is set to -1.6 or less. At least one of the outer and inner rings and the rolling elements of the rolling bearing comprises a nitrogen-enriched layer, and the grain number of the austenitic crystal grains of the nitrogen-enriched layer exceeds 10. COPYRIGHT: (C)2006,JPO&NCIPI
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