In principle, the lubrication of NAF roller bearings is the same as that of other rolling bearings, but the working conditions of roller bearings are relatively harsh, and whether the working performance can be effectively exerted depends to a large extent on the lubrication conditions of the bearings.
The lubrication methods used for roll bearings mainly include grease lubrication and oil lubrication.
Grease-lubricated grease also has a sealing effect, the sealing structure and lubrication equipment are simple, and it is convenient to add grease. Therefore, as long as the working conditions permit, the roller bearings are generally lubricated with grease. Oil lubrication has a strong cooling effect and removes dirt and moisture from the bearing. Roller bearings are lubricated by oil lubrication methods including pressure oil supply lubrication, oil injection lubrication, oil mist lubrication, and oil gas lubrication.
Pressure oil lubrication is the most useful lubrication method for NAF rolling bearings at normal speeds.
Oil injection lubrication is spraying lubricating oil into the bearing through the oil injection nozzle installed on one side of the bearing for lubrication at a certain pressure. It is generally used in high-speed roll bearings, or where the pressure oil supply lubrication cannot meet the cooling requirements. Spray lubrication is to spray dry compressed air containing oil mist to the inside of the bearing for lubrication. The amount of oil used is small. Due to the effect of air, the cooling effect is extremely strong. It is mainly used for large-scale roll bearings with high rolling speed and high rolling precision. Perhaps for roll bearings that are not often disassembled in bearing housings.
Both pressure oil supply lubrication and oil injection lubrication require the installation of inlet and outlet pipes, lubrication pumps, oil reservoirs, and sometimes lubricating oil coolers. Therefore, the cost is relatively high, and general roll bearings are rarely used.
