| 摘要 |
The device has a blade shank (3) freely and rotatably mounted in a housing of a hub (5) using a single antifriction bearing (20). A bearing ring (11) axially preloads the antifriction bearing in which two crossed cylindrical rollers (10, 10`) are grouped. The rollers are mounted in an alternate two by two manner in a dented rolling bearing cage (21). A screw maintains the bearing ring that preloads the bearing. |
