| 摘要 |
PROBLEM TO BE SOLVED: To provide a roller bearing efficiently suppressing an unpleasant noise of judder. SOLUTION: In a roller bearing having multiple rollers placed at an even interval by a cage between steel raceway track rings, the number of the rollers 3 is a multiple of a prime of not less than 2 (n), and the multiple rollers consist of a combination of steel rollers 3a and ceramic rollers 3b while the number of the ceramic rollers 3b is a prime or a multiple of a prime of not more than (n-1) to be placed at an even interval in the circumferential direction.
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