The specific method of judging whether the imported bearing should be reported for repair, that is, the specific method of judging whether the imported bearing has been fully utilized and the near damage occurs is as follows: 1) Use the imported bearing working condition monitoring instrument such as ferrograph or SPM or I-ID-1 It is the most convenient and reliable method to judge the working state of imported bearings and determine when the imported bearings should be repaired by using the imported bearing working state monitoring instrument. For example, when the HD-1 type instrument is used, 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 imported bearing itself. In the area, the imported bearing shall be reported for repair. How far from the danger zone to start repairing can be adjusted by experience. Using such an instrument, the working potential of imported bearings can be fully utilized, the imported bearings can be reported for repair in time, and failures can be avoided, which is safe and economical. 2) Use simple tools to monitor In the case where the above instruments are not available, the operator can hold a round bar or a wrench and other tools against the part of the machine casing closest to the imported bearing, and shame the ear from the tool to monitor the running sound of the imported bearing from the tool. , of course, it can also be modified with a medical stethoscope. The normal running sound of imported bearings should be uniform, smooth and not harsh, while the abnormal running sound of imported bearings has various intermittent, impactful or harsh sounds. First of all, you must get used to the normal sound of imported bearings, then you can grasp and judge the abnormal sound of imported bearings, and then through the accumulation of practical experience, you can further analyze what kind of abnormal sound corresponds to what kind of imported bearings abnormal phenomenon. There are many types of abnormal sounds of imported bearings, which are difficult to describe, mainly relying on experience accumulation.