| 摘要 |
PROBLEM TO BE SOLVED: To provide a hybrid rolling bearing in which sufficient surface hardness can be obtained without applying any special treatment to an inner ring and an outer ring and which has excellent anti seizure life, the hybrid rolling bearing being suitable when it is lubricated with a lubricant with an extreme pressure agent added therein.SOLUTION: In a hybrid rolling bearing lubricated with a lubricant containing no extreme pressure agent, a plurality of ceramic rolling elements 13 are held freely rotationally between a metallic inner ring 11 and a metallic outer ring 12 and at least one of the inner ring 11 and the outer ring 12 is formed of a steel material including ≥5 mass% of Cr and the remainder Fe with inevitable impurities, and no surface cured layer is formed. The hybrid rolling bearing lubricated with a lubricant containing an extreme pressure agent as an additive is formed of a steel material including 2-10 mass% of Cr. |
