Rolling bearings use grease as the lubrication medium, its advantages are that the fluidity of grease is small, is not easy to leak, the formation of oil film strength is good, more conducive to the sealing use of rolling bearings.At the same time, the rolling bearing using grease lubrication can also prolong the lubrication maintenance time, making the bearing maintenance more simple.

Rolling bearings lubricated by grease also have disadvantages. Compared with lubricating oil, grease has larger friction torque and lower applicability for rolling bearings requiring high speed operation.In addition, the cooling performance of the grease lubrication mode is poor. If too much grease is added to the rolling bearing, the rolling bearing will overheat due to the stirring lubricant.

2. Oil lubrication of rolling bearings

Rolling bearings are lubricated by oil lubrication, which can achieve good cooling and cooling effect, especially suitable for rolling bearings with relatively high working temperature.The viscosity of the lubricating oil used in the rolling bearing is about 0.12 to 0.2cm/s. If the load of the rolling bearing is high and the working temperature is high, the lubricating oil with high viscosity is selected, and the rolling bearing with fast rotating speed is suitable for the lubricating oil with low viscosity.

The disadvantage of rolling bearings with oil lubrication is that the oil lubrication requires that the bearing must maintain a good seal state to avoid the leakage of lubricating oil.In addition, oil lubrication needs to set up a more complex oil supply device, which is not as convenient as grease in operation and use, increasing the maintenance workload of rolling bearings.

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