| 摘要 |
PROBLEM TO BE SOLVED: To reduce friction resistance in a multilayer construction bearing for high speed rotation by giving an equally distributed stable rotating speed to a middle ring. SOLUTION: A middle ring 4 between an inner ring 2 and an outer ring 10 is provided with a holding hole for a rolling body such as a ball 7 or a roller, and the rolling body is inserted in the holding hole, and moreover a rolling bearing is provided with a shaft 4 which sandwiches the middle ring 4 and exists just inside the middle ring 4 or the inner ring 2 or the middle ring 4 and the outer ring 10 being just outside the middle ring 4 or a sleeve or the middle ring 4. |
