Things to know when choosing bearing grease

From which aspects should we choose bearing grease to make rolling bearings have better lubrication effect and make rolling bearings play a stronger performance in operation. It is known that bearing grease is a lubricant made of low-viscosity synthetic lubricant and added with various additives such as antioxidant and anti-rust. So how to choose a suitable bearing grease? Starting from the basic characteristics of bearing grease, it is mainly reflected in the following three aspects:
(1) Base oil type & viscosity The viscosity of the base oil affects the formation of the lubricating film. 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 grease. Thickener is dispersed in the base oil and forms the structural skeleton of the grease, so that the base oil is adsorbed and fixed in the structural skeleton. The water resistance and heat resistance of grease are mainly determined by the thickener.
(3) Additives. All greases contain additives. However, some additives improve the performance of the base oil itself (antioxidants, viscosity modifiers, detergents, etc.), while others act on rolling bearings and metal surfaces (such as anti-wear additives, corrosion inhibitors, and friction reducers). The composition of thickeners and base oils divides greases into different types, and different consistencies are represented by NLGI consistency numbers. Consistency represents the solidity of the grease. The original consistency data is the depth of a metal cone placed on the surface of a can of grease at 25°C within 5 seconds. It is called needle penetration or cone penetration, and the data is 0.1 mm (for example: if it sinks 25 mm, it is recorded as 250)