Purpose and method of bearing lubrication

　　The purpose of bearing lubrication:

　　The purpose of lubrication of rolling bearings is to reduce the internal friction and wear of the bearings, to prevent sticking, and the lubricating effect is as follows.

　　(1). Reduce friction and wear.

　　In the mutual contact portion of the ferrule, the rolling element and the retainer constituting the bearing, metal contact is prevented, and friction and wear are reduced.

　　(2). Extend fatigue life.

　　The rolling fatigue life of the bearing is prolonged when the rolling contact surface is well lubricated during rotation. Conversely, if the oil viscosity is low and the thickness of the lubricating oil film is not good, it is shortened.

　　(3). Discharge friction heat, cooling

　　The circulation oil supply method or the like can be used to discharge heat generated by friction or heat from the outside, and to cool. Prevent the bearing from overheating and prevent the lubricant from aging itself.

　　(4). Other

　　There is also the effect of preventing foreign matter from entering the inside of the bearing or preventing rust and corrosion.

Lubrication method:

　　The lubrication method of the bearing is divided into grease lubrication and oil lubrication. In order to make the bearing function well, first, choose a lubrication method that suits the conditions of use and the purpose of use. Lubricity of oil lubrication predominates if only lubrication is considered. However, grease lubrication has the advantage of simplifying the structure around the bearing, comparing the advantages and disadvantages of grease lubrication and oil lubrication.