The machine is used to evaluate the loading capacity of lubricants in the process of sliding friction on a contact
point under very high pressure. The above mentioned capacity including 3 datas to be tested: The maximum load Pb under the unstuck condition, sintered load Pd and comprehensive value of wearing during friction ZMZ. The machine can carry on abrasive wearing test for a long period in order to appraise friction and obtain the coefficient of friction of the material.
This machine conforms to ASTM D2783 Standard Test Method for Measurement of Extreme-Pressure Properties
of Lubricating Fluids (Four-Ball Method).