The grease used in KOYO bearings must have anti-rust effect, and the anti-rust agent should be insoluble in water. Grease should have good adhesion to form an oil film on the surface of the steel, even if the grease is filled with water.
Mechanical stability
Grease becomes soft during machining and causes leakage. When there is a vibration application example, the grease will be transferred from the bearing housing to the KOYO bearings. If the mechanical stability of the grease is insufficient, the grease will be continuously thrown out of the bearing, which will cause mechanical collapse of the soap structure and destruction of the grease.
Oil seals are necessary to protect KOYO bearings and lubricants to prevent external contamination, and no matter whether debris or moisture can penetrate into KOYO bearings to prevent damage. Correct installation and maintenance is an important factor in the longest service life of KOYO bearings. At the same time, attention must be paid to the cleanliness of the bearings, the correctness of the choice of bearings and the selection of appropriate installation and maintenance tools. KOYO bearings must be protected from contaminants and moisture and must be properly installed and lubricated. The design of the bearing arrangement, the condition of the oil seal, the type of lubricant and the lubrication cycle, as well as the special maintenance play an important role.
Never mix incompatible greases. If two incompatible greases are mixed, the consistency will usually soften and eventually damage may occur due to the loss of grease. If you don't know which kind of grease is used in the bearing, you should first remove the old grease inside and outside the KOYO bearing to add grease.
According to temperature and working conditions: grease can be classified according to their allowable working temperature. The consistency and lubricating ability of grease are affected by working temperature. KOYO bearings that operate at a certain temperature must choose the correct consistency at the same temperature. Grease with good lubrication. Grease is manufactured in different operating temperature ranges and can be classified into low temperature (LT), medium temperature (MT) and high temperature (HT) greases. At the same time, there is a type of grease called EP (extrusion resistant) or EM (resistant to extrusion and added molybdenum disulfide), with additives to enhance the strength of the lubricant film.
If the wrong choice of grease, all measures to prevent damage to KOYO bearings are also in vain. It is important to choose a grease whose base oil viscosity provides sufficient lubrication at the working temperature. The viscosity is mainly affected by temperature. The temperature rises and falls, and as the temperature drops, it rises. Therefore, it is necessary to know the viscosity of the base oil at the working temperature. Machine manufacturers usually specify the use of certain greases, and most of the standard greases can be used in a wide range.
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