1) contact degeneration

Grease is the most basic characteristics, is contact degeneration. When applied an external force, the flow of the grease in gradually become soft, apparent viscosity is reduced, but once at rest, after a period of time (very short), consistency to increase (restoration), this kind of characteristic called contact degeneration. The characteristic of grease, decided it is not suitable for parts of the lubricating oil lubrication, and show that it good performance.

2) viscosity

Grease usually use apparent viscosity or similar viscosity to represent, in that the viscosity of the grease, temperature and shear rate must be specified. Can use similar viscosity index to control the low temperature fluidity and pumping sex.

3) the ultimate strength

Grease the ultimate strength is the guide to the sample began to flow the minimum shear stress, also called ultimate shear stress. Grease ultimate strength is a function of temperature, the higher the temperature, the more fat ultimate strength is smaller, the temperature is reduced, fat ultimate strength change, it depends on the size of the thickener types and content, and system fat process conditions also have a certain relationship.

4) low temperature fluidity

Low temperature performance measure grease is one of important indicator to low temperature torque, which is, namely, in low temperature (- and ° C below) grease block low-speed flow bearing rotational degree, grease low torque by starting torque and rotation sixty mm after the average of the torque said.

5) drop point

Grease under prescribed conditions to a certain fluidity of minimum temperature is called drop point. Drop point of grease help identify grease types and roughly grease highest use of temperature, generally speaking, for soap grease, its use temperature should be lower than dropping point and ~ 30 ° C drop point is higher, the heat resistance, the better.