| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing which has high mass productivity, is cheap, is hard to arise bearing loss and slip deterioration, and has superior lubrication.SOLUTION: An angular contact ball bearing comprises an inner ring 1, an outer ring 2, a rolling element 3, a cage 4 and lubricant. The cage 4 is manufactured by injection-molding a resin material in a metal mold and is an outer ring guide system guided by an internal perimeter surface of the outer ring 2. An outside peripheral surface of the cage 4 faces with the internal perimeter surface of the outer ring 2 which is a cage guide surface guiding the cage 4, and is a guided surface guided by the internal perimeter surface of the outer ring 2. A concavity 10 extending linearly along an axial direction is formed on the outer peripheral surface of a part of a column 4b located between neighboring pocket 4a, 4a in the peripheral surfaces of the cage 4. A parting line 12 is formed within the concavity 10. |
