Core Tip: The choice of bearing grease is directly related to the stable operation of the equipment. In order to better play the best condition of the bearing, the choice of bearing grease must be considered from the following aspects:
The choice of bearing grease is directly related to the stable operation of the equipment. In order to better play the best condition of the bearing, the choice of bearing grease must be considered from the following aspects:
1, anti-rust performance
The grease used in the
bearing must have an anti-rust effect, and the anti-rust agent is preferably insoluble in water. Grease should have good adhesion and form an oil film on the surface of the steel.
2, mechanical stability
Grease becomes soft during machining and causes leakage. In normal operation, grease will be trapped inside the bearing by the bearing housing. If the mechanical stability of the grease is insufficient, during the operation, the structure of the soap of the grease will mechanically disintegrate, causing the grease to be destroyed, thereby losing the lubricating effect.
3, oil seal
Oil seals are necessary barriers to protect bearings and lubricants from external contamination. During the operation of the bearings, no matter whether debris or moisture can penetrate into the bearings, {TodayHot} to prevent damage.
Proper installation and maintenance is an important factor in the longest service life of the bearing. 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. In addition, the bearings must be protected from contamination and moisture and ensure proper installation and lubrication. Therefore, the design of the bearing arrangement, the condition of the oil seal, the type of lubricant and the lubrication cycle, and even the special maintenance play the same and important role.
4, mixed grease
Never mix incompatible greases. If two incompatible greases are mixed, the consistency will usually soften and eventually the bearings may be damaged due to the loss of grease. If you don't know which grease the bearing originally used, you must completely remove the old grease inside and outside the bearing before adding new grease.
5, the classification of oil
Mainly 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.
Bearings operating 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 roughly classified into low temperature, medium temperature and high temperature greases. {HotTag} At the same time, there is a type of grease called extrusion-resistant or extrusion-resistant and added molybdenum disulfide, and at the same time, additives are added to strengthen the strength of the lubricant film.
6, the important factor in the choice of oil
If the grease is wrongly selected, all measures to prevent the bearing are futile. 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, and it varies with temperature. It rises and falls, and when the temperature drops, it rises. Therefore, it is necessary to know the viscosity of the base oil at the operating temperature. Mechanical manufacturers often specify the use of certain greases, however most standard greases are available in a wide range of applications.
The following are several important factors for selecting grease: mechanical type; bearing type and size; working temperature; working load; speed range; working conditions, such as vibration and spindle direction is horizontal or vertical; cooling; sealing effect; surroundings.
