First, the lubrication method
The lubrication of the roller NSK bearing is basically the same as that of other rolling NSK bearings. However, the working condition of the roller NSK bearing is relatively bad, and whether the working performance can be effectively exerted depends largely on the lubrication condition of the NSK bearing.
The lubrication methods used for roll NSK bearings are mainly grease lubrication and oil lubrication.
The grease-lubricated grease has a sealing function, the sealing structure and the lubrication facility are simple, and the grease is convenient to be replenished. Therefore, as long as the working conditions permit, the roller NSK bearing is generally grease-lubricated.
The oil lubrication has a strong cooling effect and can remove dirt and moisture from the NSK bearing. Roll NSK bearings use oil-lubricated lubrication methods such as pressure oil lubrication, fuel injection lubrication, oil mist lubrication and oil and gas lubrication.
Pressure oil lubrication is the most effective lubrication method for roll NSK bearings at normal speed.
Injection lubrication is to lubricate the lubricant to the inside of the NSK bearing through a nozzle mounted on the NSK bearing side at a certain pressure. It is generally used in high-speed roll NSK bearings, or where the pressure supply lubrication cannot meet the cooling requirements.
Spray lubrication is to spray the dry compressed air containing oil mist into the NSK bearing for lubrication. The use of less oil, due to the action of air, the cooling effect is very strong, mainly used for large rolls NSK with high rolling speed and high rolling precision. Bearings, or NSK bearings for rolls that are not frequently removed in NSK bearing housings.
Pressure oil lubrication and fuel injection lubrication require the installation of inlet and outlet pipes, lubrication pumps, oil reservoirs, and sometimes oil coolers. Therefore, the cost is high, and NSK bearings are generally used less.
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