ROLLING BEARING FOR ROCKER ARM

摘要

A rolling bearing (50) for a rocker arm, comprising a roller (4) in rolling contact with the cam (6) of an engine, a roller shaft (2) positioned on the inside of the roller (4) and fixed to the rocker arm (1), and a plurality of rollers (3) interposed between the roller (4) and the roller shaft (2). At least one member of the roller (4), the roller shaft (2), and the rollers (3) comprises a nitrogen-enriched layer, the grain size number of the austenitic crystal grain of the member is within the range of exceeding 10, and the surface hardness Hv of the member is 653 or higher. Thus, the life of the rolling bearing can be increased.