| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling device that can be manufactured without performing any complex machining for preventing surface damage or longer hour processing and expensive processing, and can realize a long life without producing early failure caused by the surface damage even if it is used under a state in which the rolling elements show poor oil film formation.SOLUTION: A rolling bearing 1 comprises: an inner ring 2 having an inner ring raceway surface 2a at its outer periphery; an outer ring 3 having an outer ring raceway surface 3a at its inner periphery; and a plurality of rolling members 4 rolling between the inner ring raceway surface and the outer ring raceway surface. The inner ring 2 and the outer ring 3 are processed at their steel members by polyhydric alcohol coating. Each of the rolling members 4 is made of steel and there occurs a hardness difference of Rockwell hardness HRC by one point or more between the steel member of the inner ring 2 and each of the steel members of rolling members 4, and between the steel member of the outer ring 3 and each of the steel members of rolling members 4.SELECTED DRAWING: Figure 1 |
