SH120 automatic four-ball friction testing machine,The design principle of this machine absorbs the stability of the lever four-ball machine andand combines the loading charcteristics of the servovalve.Automatic zero clearing, automatic loading, automatic holding, automatic test, automatic unloading, automatic measuring and taking pictures of spot diameterare realized by servo motor, air spring and closed-loop control software. one-click operation, data storage and one-click storage.

 in the form of slide friction, is used for the loading capacity evaluation of lubricants in the high pressure point contact condition. It can test the maximum nonseizure load PB, sintered load PD and composite wear value ZMZ of lubricants .The four-ball friction test machine can also be used as lubricant for long time wear resistance test, determination of friction coefficient, recording friction and temperature curve. It also can measure the dimension of the wear scar and display,measurement and recording the wear scar on the PC screen.

GB3142-82,Determination of the carrying capacity of lubricants (four-ball method);

SH/T0189-92,Determination of oil abrasion resistance (four-ball machine method);

ASTM D2266-01 Test method for friction and wear of lubricating oil (four-ball method)

ASTM D2783-2003 (2009)  four-ball bearing capacity of four balls of lubricants

GB/T12583-98  Determination of extreme pressure performance of lubricants (four-ball machine method);

SH/T0202-92,The method of determination of extreme pressure of grease (four-ball machine method);

SH/T0204-92,Determination of resistance to abrasion of grease (four-ball machine method).

Two. Technical parameters