| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing capable of securing sufficient durability even under a severe use condition.SOLUTION: Outer and inner rings 3 and 5 are made of alloy steel that suppresses a structural change, caused by hydrogen, to some extent. In addition, outer-ring and inner-ring raceways 2 and 4 of the outer and the inner rings 3 and 5, and rolling surfaces of respective balls 6 and 6 have properties that make surface roughness hardly worse. Furthermore, RSm crowning a roughness curve of a raceway surface is set to be a great value such as 8 μm or more. These restrain a newly formed surface from being formed by metal contact, suppress hydrogen generation in itself, and suppress structural change-type separation. |
