It's important to choose lubricants. Here's how to choose lubricants

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      The selection of lubricating oil is the key factor to ensure the reliable operation and prolong the service life of rolling bearings. Most rolling bearing faults are directly or indirectly related to improper lubrication. This includes the use of inappropriate lubricants, lubricant aging and insufficient lubrication. The causes of failure of rolling bearings are: (1) insufficient lubrication; (2) inappropriate lubricant; (3) aging lubrication; (4) failure of material and production; (5) wrong selection of bearings; (2) secondary damage; (5) failure of installation; (2) liquid impurities; (2) solid impurities. Except for the use of lubricants (such as mineral oil and synthetic oil) for rolling bearings in extreme working environments (such as high temperature and radiation), grease is recommended by most bearing manufacturers. This paper mainly shares the choice of lubricating grease for rolling bearings. 1. When selecting suitable grease for rolling bearings, the following factors should be taken into account: bearing type, speed, working temperature and load, installation position, seal, impact and vibration, as well as regulations and environmental requirements. The characteristics of grease depend fundamentally on the following three aspects: 1) the type of base oil - viscosity of base oil affects the formation of lubricating film. The most common base oils are mineral oils and synthetic oils, which are the lowest-cost base oils because their production processes and costs are much simpler and cheaper than synthetic oils. Synthetic oils are composed of synthetic hydrocarbons, synthetic esters, polyglycols, silicone oils, fluorinated oils, phosphate esters, polyethers and so on. They have different characteristics. 2) Thickener is an important component of lubricating grease. Thickener disperses in base oil and forms the structure skeleton of lubricating grease, so that base oil is adsorbed and fixed in the structure skeleton. The water resistance and heat resistance of greases are mainly determined by thickeners. There are two kinds of thickeners used to prepare grease: soap-based thickeners (i.e. fatty acid metal salts) and non-soap-based thickeners (hydrocarbons, inorganic and organic). 3) Additives All greases contain additives. But some additives improve the base oil itself.


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