Is it required for the installation surface and installation site? Yes. If there are iron chips, burrs, dust and other foreign matters in the bearing, the bearing will generate noise and vibration during operation, and even damage the roller and rolling element. Therefore, before installing the bearing, you must ensure that the installation surface and installation environment are clean.
Must the bearing be cleaned before installation? The bearing surface is coated with antirust oil. You must carefully clean it with clean gasoline or kerosene, and then apply clean high-quality or high-speed high-temperature lubricating grease before installation. Cleanliness has great influence on bearing life and vibration noise. However, we would like to remind you that totally enclosed bearings do not need to be cleaned and oiled.
How to choose grease lubrication has a very important influence on the operation and life of bearings. Here is a brief introduction to the general principles of grease selection. The lubricating grease is made of base oil, thickener and additive. The performance of lubricating grease of different types and different brands of the same type varies greatly, and the allowable rotation limit is different. Please pay attention to the selection. The performance of the grease is mainly determined by the base oil. General low viscosity base oil is suitable for low temperature and high speed; High viscosity is suitable for high temperature and high load. Thickener is also related to the lubrication performance, and the water resistance of thickener determines the water resistance of lubricating grease. In principle, greases of different brands cannot be mixed, and even greases with the same thickener will have bad effects on each other due to different additives.
When lubricating bearings, it is a common misconception that the more grease is applied, the better. Excessive grease in the bearing and bearing chamber will cause excessive mixing of grease, resulting in extremely high temperature.
How to install, disassemble and install. Do not directly hammer the bearing end face and non stress surface. Use blocks, sleeves or other installation tools to evenly stress the bearing. If the mounting surface is coated with lubricating oil, the installation will be more smooth. If the fit interference is large, the bearing shall be put into mineral oil and heated to 90~100 ℃ before installation. In case of difficulty in disassembly, it is recommended that you use the disassembly tool to pull outward and carefully sprinkle hot oil on the inner ring. The heat will cause the inner ring of the bearing to expand, so that it is easier to fall off.