| 摘要 |
A rolling bearing (50) for a rocker arm includes an outer ring (4) in rolling contact with a cam (6) of an engine, an outer-ring shaft (2) placed inside the outer ring (4) and fixed to the rocker arm (1), and a plurality of rollers (3) provided between the outer ring (4) and the outer-ring shaft (2). At least one of the outer ring (4), the outer-ring shaft (2) and the rolling elements (3) has a nitrogen-rich layer, an austenite crystal grain size number in a range exceeding 10, and a surface hardness Hv of at least 653. Thus, the life can be extended. |
