Equipment introduction: The lever four-ball friction tester is in the form of sliding friction and is mainly used to evaluate the load-bearing capacity of lubricants under extremely high point contact pressure conditions. Including the maximum non-seizing load PB, sintering load PD, comprehensive wear value ZMZ and other three indicators, in actual applications, different evaluation indicators can be selected according to the various uses of the lubricant. The ambient temperature of the test engine oil box can reach up to 250°C, and can be pre-selected for time, friction, temperature, etc., and can also determine the friction coefficient of frictional parts.