Several points for attention in the selection of bearing grease
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| Time：2016.09.01 News Sources：Shandong Xinkaite bearing Co.,Ltd. Views：
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In order to better exert the best condition of bearing, the selection of bearing grease is directly related to the stable operation of the equipment. The choice of bearing grease must be considered from the following aspects:
1 rust resistance
Anti rust agent best can not dissolve in water. Grease should have good adhesion, used in bearing grease must have rust effect. And a layer of oil film can be formed on the surface of steel.
2 mechanical stability
Cause leakage. In normal operation, the grease will soften when machining. Grease will be thrown into the bearing by the bearing seat. If the mechanical stability of grease is not enough, the operation process, will make the structure of the oil soap mechanical disintegration, cause the grease to be destroyed, and thus lose the lubrication.
3 oil seal
Bearing operation, the oil seal is necessary to protect the bearings and lubricants from the external pollution of the barrier. Matter or moisture can not penetrate the bearings, in case of damage to its. The correct device later played an important factor bearing the longest service life. At the same time, it is necessary to pay attention to the cleanliness of bearings, the correctness of the bearing selection and selection of appropriate equipment and maintenance tools. In addition, bearings must be protected from contamination and moisture contamination, and are guaranteed to be properly protected by means and lubrication. Type of lubricants and lubrication cycle, so the design of seal bearing arrangement condition, as well as specialized Yang are important and plays the same role.
4 mixed fats and oils
If the two kinds of incompatible mix oil, never mix oils should not be compatible. Usually its consistency will become soft, and finally may be due to the loss of grease and cause damage to the bearing. If you do not know what kind of grease bearing the original use, it is necessary to completely remove the old grease inside and outside the bearing, before adding new oil.
5 Classification of fats and oils
Grease consistency and lubrication ability is affected by the operating temperature of a certain temperature operation of the bearings must be selected at the same temperature with the correct consistency and good lubrication effect of grease. Grease is made from different operating temperature range can be roughly divided into low temperature, medium temperature and high temperature. At the same time, it is mainly based on the temperature and working conditions: the grease can be classified according to the working temperature. There is a type of fat called resistance to extrusion or extrusion and MoS2, at the same time, which combined with additives to enhance lubricating oil film strength.
6 important factors in the selection of oils and fats
Choose a kind of fat, if the wrong choice of grease is all the prevention of bearing measures in vain. Base oil viscosity at the operating temperature is able to provide sufficient lubrication effect is very important viscosity mainly affected by the temperature, with the temperature rise and fall, when the temperature drop is rising. Therefore, it is necessary to know the base oil viscosity at operating temperature. Machinery manufacturers usually specify the use of a certain kind of grease, but most of the specification of the scope of application of grease is very wide.
Such as vibration and the direction of the main shaft is horizontal or vertical; cooling conditions; sealing effect; peripheral environment. The following are some of the important factors in the selection of grease: mechanical type; bearing type and size; working temperature; working load; speed range; working conditions.
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