| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a low cost rolling bearing which suppress life deterioration caused by surface damage even under a high speed, high load and high temperature environment, or when a foreign matter is mixed into grease or lubricating oil. Ž<P>SOLUTION: The rolling bearing is characterized in that: a plurality of rolling element is retained rollably between races by a retainer; and the nitrogen concentration of the rolling element is higher by 0.1-1.0% than that of the race. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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