We all know that the vast majority of greases are used for lubrication and are called anti-friction greases. Anti-friction grease mainly plays the role of reducing mechanical friction and preventing mechanical wear. At the same time, it also plays a protective role to prevent metal corrosion, as well as sealing and dustproof. What are the precautions for the selection of lubricating grease?

　　The selection of grease should pay attention to the following aspects:

　　1. The selected grease should be adapted to the load.

　　For heavy loads, a grease with a high base oil viscosity and high thickener content should be selected. When the load is particularly large, care should be taken to select a grease with extreme pressure additives or fillers (molybdenum disulfide, graphite); when the load is medium and low, the grease with a short structure of No. 2 soap fibers and a medium viscosity base oil is generally used.

　　2. The selected grease should be adapted to the working state of the friction pair

　　For example, when the vibration is large, use grease with high viscosity, good adhesion and vibration damping, such as complex soap-based grease thickened with high-viscosity naphthenic or mixed-base lubricating oil.

　　3. The selected lubricating grease should minimize the variety of grease and improve economic benefits.

　　In the case of meeting the requirements, try to use multi-purpose general-purpose greases such as lithium-based grease, complex soap-based grease, and polyurea grease. In this way, the variety of grease is reduced, the management of grease is simplified, and the cost of grease consumption and maintenance costs can be reduced due to the long service life of the multi-effect grease.

　　4. The selected grease should be suitable for its purpose of use

　　The grease used for lubrication must be selected according to the type of friction pair, working conditions, working conditions, environmental conditions and grease supply methods; for the grease used for protection, it should be able to effectively protect the metal from corrosion, such as protection For parts in contact with seawater, aluminum-based grease with strong adhesion and water resistance should be selected; general protective grease can be made of solid hydrocarbon-thickened high-viscosity base oil. For sealing grease, attention should be paid to its resistance to the solvent of the medium being sealed.

　　5. The operating temperature of the grease should be at least 50~60 degrees lower than its dropping point

　　When the operating temperature is high, the grease with good oxidation resistance, small evaporation loss and high dropping point should be selected; when the operating temperature is low, the grease with low starting torque and similar viscosity should be selected, such as the grease with synthetic oil as the base oil .

　　6. The selected grease should be adapted to the working state of the friction pair

　　For example, when the vibration is large, use grease with high viscosity, good adhesion and vibration damping, such as complex soap-based grease thickened with high-viscosity naphthenic or mixed-base lubricating oil.

　　7. The selected grease should be compatible with the environmental conditions used

　　In the environment where the air is humid or in contact with water, grease with good water resistance such as calcium-based, lithium-based, and complex lithium-based should be selected; when there is a lot of dust, thicker (that is, higher grade) grease should be selected, so that the sealing performance Preferably, impurities can be prevented from being mixed into the friction pair. In the environment of strong chemical medium, synthetic oil grease that is resistant to chemical medium such as fluorocarbon grease should be selected.

　　8. The selected lubricating grease should be adapted to the use speed of the lubricated friction pair

　　At high speed, a grease with a larger penetration degree made of a low-viscosity base oil should be selected; for a low-speed grease, a grease with a high penetration degree made of a high-viscosity base oil should be selected.

　　The above is the introduction of the precautions for the selection of lubricating grease, for reference only.