| 摘要 |
PROBLEM TO BE SOLVED: To reduce the generation of Fc vibration of a shaft caused by the vibration of a cage at a high speed by specifying a guide clearance of the cage with respect to a guide diameter of the cage, and specifying the clearance of a pocket of the cage to the guide clearance. SOLUTION: The Fc vibration can be reduced below 0.2 μm by controlling a guide clearance 5 to a guide diameter d1 of a cage 4 below 0.4%, which improves the working surface. As the possibility of the seizure of a guide surface is generated when the guide clearance 5 is too small, it is necessary to ensure the guide clearance 5 to be above 0.05% of the guide diameater d1 of the cage 4. By adjusting a pocket clearance 6 to be 0.8-1.8 times of the guide clearance 5, the Fc vibration can be reduced. By reducing the guide clearance of the cage in comparison with a conventional one, and properly setting the pocket clearance to the guide clearance, the unequal arrangement of balls caused by the vibration of the cage can be reduced, and the rotating accuracy of the bearing can be improved. |
