Eight main properties of grease

1.Thixotropy

The most basic characteristic of grease is thixotropy. When an external force is applied, the flow of the grease gradually becomes softer, showing a decrease in viscosity. However, once it is stationary, after a period of time (a short period of time), the consistency increases (recovers) again. This characteristic is called thixotropy. This characteristic of grease determines that it can lubricate parts that are not suitable for lubricating oil and show its excellent performance.

2.Viscosity

Greases are usually expressed by apparent viscosity or similar viscosity. When stating the viscosity of a grease, the temperature and shear rate must be specified. Similar viscosity indicators can be used to control its low temperature fluidity and pumpability.

3.Strength limit

The strength limit of grease refers to the minimum shear stress required to cause the sample to start flowing, also known as the ultimate shear stress. The strength limit of grease is a function of temperature. The higher the temperature, the smaller the strength limit of grease. As the temperature decreases, the strength limit of grease becomes larger. Its size depends on the type and content of the thickener, as well as the grease making process conditions. relation.

4. Low temperature fluidity

One of the important indicators to measure the low-temperature performance of grease is low-temperature torque, which is the degree to which grease blocks the rotation of low-speed flow bearings at low temperatures (below -20°C). The low-temperature torque of grease is determined by the starting torque and rotation 60MM. The average value of the rear torque is expressed.

5. Drop point

The lowest temperature at which grease reaches a certain fluidity under specified conditions is called the dropping point. The dropping point of grease helps to identify the type of grease and roughly estimate the maximum service temperature of the grease. Generally speaking, for soap grease, its service temperature should be 20~30°C lower than the dropping point. The higher the dropping point, the higher the dropping point. The better the heat resistance.

3.Strength limit

The strength limit of grease refers to the minimum shear stress required to cause the sample to start flowing, also known as the ultimate shear stress. The strength limit of grease is a function of temperature. The higher the temperature, the smaller the strength limit of grease. As the temperature decreases, the strength limit of grease becomes larger. Its size depends on the type and content of the thickener, as well as the grease making process conditions. relation.

4. Low temperature fluidity

One of the important indicators to measure the low-temperature performance of grease is low-temperature torque, which is the degree to which grease blocks the rotation of low-speed flow bearings at low temperatures (below -20°C). The low-temperature torque of grease is determined by the starting torque and rotation 60MM. The average value of the rear torque is expressed.

5. Drop point

The lowest temperature at which grease reaches a certain fluidity under specified conditions is called the dropping point. The dropping point of grease helps to identify the type of grease and roughly estimate the maximum service temperature of the grease. Generally speaking, for soap grease, its service temperature should be 20~30°C lower than the dropping point. The higher the dropping point, the higher the dropping point. The better the heat resistance.