(1) Before the bearing is installed, appropriate measuring tools should be used to check the processing quality of the shaft and seat hole and related parts (such as dimensional accuracy, shape accuracy and surface roughness, etc.) according to the technical requirements on the design drawings. (2) If there are bumps, burrs, rust spots or solid particles (such as wear debris, sand, mud) on the assembly surface of the shaft and the seat hole, it will not only make the bearing installation difficult and make the installation position incorrect, but also solid particles If it falls into the bearing, it will play a grinding role. When the bearing rotates, it will wear or scratch the working surface of the bearing. Therefore, it must be carefully checked before installation. If the above defects are found, they should be corrected. For example, use an oil file to remove burrs, raised bumps, and rust spots, and use a fine emery cloth to polish them, or clean solid particles and dirt. (3) The assembly surface should be cleaned with clean gasoline, kerosene, toluene or xylene and other solutions, dried with a clean rag, and then coated with a thin layer of lubricating oil, which can make the installation operation more convenient. (4) Open the bearing package during temporary installation, immerse it in the above-mentioned gasoline and other liquids and rotate it gently by hand, to ensure that the cage, rolling elements and the package oil on the surface of the raceway are thoroughly cleaned. (5) When cleaning a large number of bearings, first scald with hot oil with a temperature of 90-100°C to melt the encapsulated oil, and at the same time dig out all the old oil with a tool without sharp edges and no chips, and then scald for a few minutes, then Rinse off the oil with kerosene, then clean it again with gasoline at the end. After cleaning, wear film gloves and place the bearing on a clean cloth or paper on the workbench to dry. (6) Note that the sealed bearing cannot be cleaned by this method, and the inside of the seal should be kept as it is and cannot be cleaned.