The rational use of bearings in service is the primary method of extending their life. Reasonable use of bearing the most important bearing lubrication. Bearing lubrication to achieve the best results in the choice of grease is the key.
Select bearing grease must be considered from the following aspects:
1, anti-rust properties Used in the bearing grease must have anti-rust effect, anti-rust agent is best not soluble in water. Grease should have good adhesion, and can form a layer of film on the surface of steel.
2, mechanical stability of the grease will be soft during machining, leading to leakage. In normal operation, the grease will be thrown into the bearing housing. If the grease mechanical stability is not enough, during operation, will make the structure of grease soap mechanical disintegration, resulting in grease is destroyed, thus losing the lubricating effect.
3, the oil seal is necessary to protect the bearings and lubricants from external pollution barriers, bearing operation, regardless of debris or moisture can not penetrate the bearings, to prevent its damage. Correct installation and maintenance is to play an important factor in the longest bearing life. At the same time, we must pay attention to the cleanliness of the bearing, bearing the correct choice and the selection of appropriate installation and maintenance tools. In addition, the bearings must be protected against contamination and moisture and must be correctly installed and lubricated. Therefore, the design of bearing arrangement, the status of oil seal, lubricant type and lubrication cycle, and even the special maintenance plays the same but important role.
4, mixed fat Never incompatible grease mix, if the two incompatible grease mix, usually its consistency will be softened, and finally may be due to the grease easily lost bearing damage. If you do not know which grease was originally used for the bearing, you must first completely remove the old grease inside and outside the bearing before adding new grease.
5, the classification of oil is mainly divided according to temperature and working conditions: grease can be classified according to their allowable working temperature, grease consistency and lubrication ability is affected by the working temperature, the bearings operating at a temperature must choose the same Grease with correct consistency and good lubrication at temperature. Grease is manufactured in a wide range of operating temperatures and can be roughly divided into greases for use at low temperature, medium temperature and high temperature. At the same time, there is a class of greases called crush or crush resistance and the addition of molybdenum disulphide, while adding additives to enhance the strength of lubricating oil film.
6, an important factor in the choice of grease If the wrong choice of grease all the measures to prevent the bearing is futile, choose a grease, its base oil viscosity at work temperature is able to provide adequate lubrication effect is very important, the viscosity is mainly affected by temperature Affects, it declines as the temperature rises, and when the temperature drops it rises. Therefore, it is necessary to know the viscosity of the base oil at operating temperature. Machinery manufacturers usually specify the use of a certain type of grease, however, most of the standard grease is suitable for a wide range of applications.