1. Determine the best time for bearing repair It is better to turn the rolling bearing into the repairing state, which should be judged from the damage law and characteristics of the bearing. The damage of the most used small and medium-sized bearings is usually dominated by fatigue and excessive wear of the rings or rolling elements. When the rolling surface of the bearing enters the third stage of wear, or has pitting and spalling, the bearing will tend to fail quickly. At this time, the damage to the raceway surface is very serious, and it is difficult to repair, or has lost the repair value. However, before the above stage, the bearing wear is relatively slight, and fatigue may only occur in the depth of a few microns to tens of microns below the surface layer of the rolling surface. repair effect. In short, the repair period of rolling bearings is when the bearing has been working for a long period of time and has been fully utilized, and it is most appropriate to enter the repair before the damage occurs. 2. the method of determining the timing of bearing repair The specific method of judging whether the bearing should be reported for repair, that is, the specific method of judging whether the bearing has been fully utilized and the damage is approaching is as follows: 1) Use the bearing working condition monitoring instrument It is the most convenient and reliable method to judge the working state of the bearing and determine when the bearing should be repaired by using a monitoring instrument such as a ferrograph or SPM or I-ID-1 bearing working condition. . For example, when using the HD-1 type instrument, when the pointer approaches the danger area from the warning area, but the pointer does not return after taking measures such as improving lubrication, it can be determined that the problem is the bearing itself, and you can take advantage of it before entering the danger area. When the bearing is repaired. How far from the danger zone to start repairing can be adjusted by experience. Using such an instrument, the working potential of the bearing can be fully utilized, the bearing can be repaired in time, and failures can be avoided, which is safe and economical. 2) Use simple tools to monitor In the absence of the above instruments, the operator can hold a tool such as a round bar or a wrench against the part of the machine shell closest to the bearing, and put the ear ashamed of the tool to monitor the running sound of the bearing from the tool. Of course, it can also be modified with a medical stethoscope. . The normal bearing running sound should be uniform, smooth and not harsh, while the abnormal bearing running sound has a variety of intermittent, impactful or harsh sounds. First, get used to the normal bearing running sound, then You can grasp and judge the abnormal bearing running sound, and then through the accumulation of practical experience, you can further analyze what kind of abnormal sound corresponds to what kind of bearing abnormal phenomenon.