A:

Bearing grease is mostly used in bearing seats, sealing structures, and places where lubrication facilities are simple and easy to maintain. To a certain extent, it can prevent the intrusion of water, gas, dust, and other impurities. It is made of base oil, thickener, and additives into a semi-solid lubricant. 

Among them, the base oil is a synthetic oil such as mineral oil, which mainly plays a lubricating effect; thickeners play an important role in the temperature characteristics and water-resistance of the lubricant; additives play a role in enhancing the lubricant's anti-oxidation and anti-rust properties.