The selection of bearing grease has certain rules. The main reference factors are: bearing speed, diameter (the so-called speed factor DN value), whether it is sealed, working temperature, load, environment, lubrication method, and whether there are special requirements ( such as low noise, etc.). Shell believes that satisfactory lubrication can only be obtained by strictly understanding the working conditions of the equipment and the requirements for bearings, and selecting grease reasonably. The choice of oil can be based on the following factors:
1) DN value: According to the DN value, select the appropriate penetration and the appropriate base oil viscosity.
2) Sealing material: Pay attention to the compatibility between the sealing material and the oil. Grease base oils may be incompatible with certain seal materials, especially synthetic oils.
3) Working temperature: select the appropriate base oil type according to the working temperature, pay attention to the high and low temperatures of the working temperature; select the appropriate thickener type to ensure the high-temperature effect.
4) Load: Evaluate the load of the bearing and select additives, such as whether AW/EP type additives are required.
5) Lubrication method: manual filling or centralized lubrication pumping. For centralized grease supply, No. 00~1 grease should be selected; for parts that are regularly filled with greases such as grease guns and grease cups, No. 1~3 grease should be selected; for long-term use without grease replacement, it should be Use No. 2 or No. 3 grease.
6) Special requirements: such as low noise requirements, etc.
7) Environment: whether there is dust, humidity, chemical media, etc. For example, in the environment of a strong chemical medium, synthetic oil grease resistant to a chemical medium such as fluorocarbon grease should be selected.
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