The basic rated life means that a group of bearings are operated under the same conditions, 90% of which can not reach the total number of revolutions due to surface fatigue caused by rolling fatigue.
Its actual life is related to bearing selection, material, structure, processing quality, bearing peripheral design and operating environment and installation and maintenance, but fatigue failure is not the main form of turret bearing failure, because the turret bearing has high rotation accuracy, so its Usually loses its accuracy due to wear (generating axial and radial clearance) or other damage caused by abnormal use
