What to know when choosing lubricating grease for deep groove ball bearings. Recently, some people are still unsure how to choose the appropriate shaft grease when purchasing bearing grease? From what aspects can bearing grease be selected to achieve better lubrication effect for rolling bearings and enhance their performance during operation. It is known that bearing grease is a lubricating oil formulated from low viscosity synthetic lubricating oil and added with various additives such as anti-oxidation and anti rust. So how to choose the appropriate bearing grease? Starting from the basic characteristics of bearing grease, it is mainly reflected in the following three aspects:
(1) The type and viscosity of base oil affect the formation of lubricating film. The common base oils are mineral oil and synthetic oil. The former is a low-cost base oil, and its production process and cost are much simpler and cheaper than synthetic oil.
(2) Thickener Thickener is an important component of lubricating grease, which disperses in the base oil and forms the structural skeleton of the grease, allowing the base oil to be adsorbed and fixed in the structural skeleton. The water resistance and heat resistance of lubricating grease are mainly determined by the thickening agent.
(3) Additives All lubricating greases contain additives. But some additives improve the performance of the base oil itself (antioxidants, viscosity adjusters, detergents, etc.), while others work on rolling bearings and metal surfaces (such as anti-wear additives, corrosion inhibitors, friction reducers). The composition of thickeners and base oils divides lubricating grease into different types, with different viscosities represented by NLGI viscosity numbers. The viscosity represents the degree of solidity of the lubricating grease. The original viscosity data is measured by placing a metal cone on the surface of a can of lubricating grease and measuring the depth of penetration within 5 seconds at 25 ° C, which is called penetration or cone penetration. The data is 0.1 millimeters (for example, if it sinks 25 millimeters, it is recorded as 250). The recognized testing standard is DINISO2137, ASTMD217
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