Machine tool shaft parts, especially the main shaft, generally assemble with thrust ball bearing into an organic whole, and rotate at high speed, can sometimes produce high heat. If not promptly eliminate, this phenomenon will causethe angular contact ball bearing overheating, and makes the corresponding parts temperature rise and thermal deformation will occur, serious when they make themain shaft and tail frame range is high, which not only affect the accuracy andmachining accuracy of machine tool itself, but also the bearing burn out.

Rated fatigue life, it is to point to a set of the same type of bearing,in the same conditions, 90% of the angular contact ball bearing is not appearfatigue spalling caused by the total number of turns. When the rotating speedis constant, multi-purpose total run time rated fatigue life.

When research thrust ball bearing life,not only consider the fatigue life, but also according to the performance ofthe bearing should have comprehensive several use limit to consider. For example, the grease lubrication grease bearing life. Life and wear life, noise,according to different purposes, using different limit benchmark, so, mostly chosen in advance experience.

Therefore, only survey angular contact ball bearing damage, the realreason is hard to come by injury. But, if you know the use of thrust ballbearing machinery, conditions of use, bearing the surrounding structure, to gethold of before and after the accident, combined with several damage status andcauses of bearing, can prevent the similar accident happen again.

Angular contact ball bearing is available, mainly considering bearing damage degree,mechanical properties, importance, and operating conditions, to the nextoverhaul period. If there are the following defects can't use, must replace the new thrust ball bearing. Inner ring and outer ring, rolling element and cage onany one have crack or gap.