When selecting grease, it is mainly based on the working environment, operating temperature, load conditions, etc. of the bearing.

1. Working environment

It mainly refers to the minimum and maximum temperature of the working environment, air humidity, whether it contains corrosive gases or excessive dust, etc. For example, when used outdoors in severe cold areas, lithium-based low-temperature grease should be used; calcium-based grease should be used in places with high humidity and water; in dry places with less water, sodium that is easily soluble in water should be used. base grease.

2. Working temperature

One is the lowest temperature of the use environment, and the other is the highest temperature that may occur during operation. When the operating temperature is high, high-temperature grease with a higher dropping point should be selected. The actual maximum operating temperature should be 10-20°C lower than the grease dropping point (synthetic grease should be 20 ~ 30°C).

3. Load conditions

For heavy loads, grease with smaller taper penetration should be used. When working under high pressure, in addition to requiring small cone penetration, it also requires high oil film strength and extrusion performance.