Do new bearings need to be cleaned before installation?

Since the influence of cleanliness on the life and vibration noise of rolling bearings is very large, some bearings must be carefully cleaned with clean gasoline or kerosene, and then coated with clean high-quality or high-speed high-temperature grease. However, fully enclosed bearings do not require cleaning and refueling.

Here is a brief overview of the general principles for selecting grease.

Grease is made of base oil, thickener and additives. The grease performance of different types and different grades varies greatly. The allowable rotation limit is different. Be careful when selecting.

The performance of grease is mainly determined by the base oil. Generally, the low viscosity base oil is suitable for low temperature, high speed and high viscosity for high temperature and high load. The thickener is also related to the lubricating properties, and the water resistance of the thickener determines the water resistance of the grease.

In principle, the different greases of the brand cannot be mixed, and even the grease of the same thickener may have a bad influence on each other due to the different additives.
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