| 摘要 |
At least one of the contacting surfaces of an outer ring, an inner ring and surfaces of rolling elements of a rolling bearing are formed with a plurality of groove-shaped recess portions having a depth of 0.0005 to 0.008 mm, and with smooth surface portions having a roughness of 0.08 mu mRa partitioned by the groove-shaped recess portions. The groove-shaped recess portions do not disappear completely during rotation. In manufacturing the rolling bearing, a multi-process superfinishing operation is used in which firstly, the groove-shaped recess portions, having a depth of 0.0005 to 0.008 mm, are formed in at least the raceway surface of the outer ring of the rolling members by using a rough particle whetstone having an average particle size of 20 to 40 mu m, and subsequently, the smooth surface portions having the roughness equal to or smaller than 0.08 mu mRa and partitioned by the many groove-shaped recess portions are formed by using a minute particle whetstone for finishing work having an average particle size of 0 to 8 mu m.
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