1. Requirements for the installation surface and installation site. If there are foreign objects such as iron filings, burrs, dust, etc. in the koyo bearing, it will cause noise and vibration during the operation of the cylindrical roller bearing, and even damage the raceway and rolling elements. Therefore, before installing the bearing, you must ensure that the installation surface and installation environment are clean. 2. The bearing surface must be cleaned and coated with anti-rust oil before installation. You must carefully clean it with clean gasoline or kerosene, and then apply clean, high-quality or high-speed and high-temperature lubricating grease before installation and use. The impact of cleanliness on the life and vibration noise of cylindrical roller bearings is very large. But we would like to remind you that: the fully enclosed bearing does not need to be cleaned and refueled. 3. Selection of lubricating grease Lubrication has an extremely important influence on the operation and life of koyo bearings. Here is a brief introduction to the general principles of selecting lubricating grease. Grease is made of base oil, thickener and additives. The performance of different types and different brands of greases of the same type is very different, and the allowable rotation limits are different. Be careful when choosing. The performance of lubricating grease is mainly determined by the base oil. Generally, the low-viscosity base oil is suitable for low temperature and high speed, and the high-viscosity base oil is suitable for high temperature and high load. The thickener is also related to the lubricating performance, and the water resistance of the thickener determines the water resistance of the grease. In principle, greases of different brands cannot be mixed, and even greases of the same thickener will have adverse effects on each other due to different additives. Fourth, when adding grease to lubricate bearings, the more grease the better, this is a common misconception. Excessive grease in cylindrical roller bearings and in the bearing chamber will cause excessive agitation of the grease, resulting in extremely high temperatures. The amount of lubricant filled in the koyo bearing is suitable to fill 1/2 to 1/3 of the inner space of the bearing, and it should be reduced to 1/3 at high speed. Causes and solutions of two important damaged states of cylindrical roller bearings 1. Fracture: Damaged state: The so-called fracture refers to the occurrence of damage caused by the impact or excessive load applied to the rib of the raceway wheel or the local part of the roller angle. A small part is broken. This is a very common type of damage. Everyone try to pay attention when using it. Reasons: It was hit during installation; the load was too large; Actions: Improve the installation method (use shrink-fit, use appropriate tool clamps); correct the load conditions; install the bearings in place so that the ribs are supported. This is the first kind. 2. Peeling: Damaged state: There is a dark side with slight wear, and there are many tiny cracks with a depth of 5-10m from the surface on the dark side, and tiny peeling (micro peeling) occurs in a large range. Reasons: The lubricant is not suitable; the foreign matter has entered the lubricant; the poor lubricant causes the surface to be rough; the surface finish of the paired rolling parts is not good. Measures: choose lubricant; improve sealing device; improve surface finish of paired rolling parts.
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