| 摘要 |
PROBLEM TO BE SOLVED: To prolong the life of a rolling bearing in a rotation state where its outer ring is fixed and its inner ring rotates, like a rolling bearing used in an on-vehicle alternator.SOLUTION: In a rolling bearing of which outer ring is fixed and inner ring rotates, the inner ring, the outer ring and a rolling body are made of high carbon chrome steel; the inner ring is subjected to dimensional stabilization temper heat treatment so that surface hardness after treatment is in a range of HRC 56-60; and the outer ring and the rolling body are subjected to standard temper heat treatment so that surface hardness after treatment is HRC 60 or more. |
