ASTM D 4172 ASTM D 2783 ASTM D 2596 Computer Control Type Servo Four Ball Wear Testing Machine

This machine is used to evaluate carrying capacity of lubricant under high contact pressure by sliding friction, including the largest non-card bite load Pb, sintering load Pd and the composite wear value ZMZ; it can also be used for a long time wear tests, determination of friction and the frictional coefficient calculation. Equipped with special annex, it can also be used to do end-wear test and simulation test for materials.

The machine consists of a base and frame, a main shaft and its AC servo drive system, a friction sub-disk and a sample clamping device, a test force electro-hydraulic servo closed-loop loading system, an electronic measurement system for various test parameters, a computer and a data acquisition board and It is composed of special control software and other parts. The drive of the main shaft is composed of an AC servo motor and its control system. The system can achieve constant torque output in its entire speed range, and can work smoothly at extremely low speeds, thus realizing the large range of the main shaft without Level speed regulation meets the needs of different researchers. The loading of the test force adopts an electro-hydraulic servo closed-loop system, the size of which is set by the operator on the computer interface, and the application is stable and reliable, thereby avoiding the influence of the fluctuation of the test force on the test results. The system is realized by an electro-hydraulic servo-controlled low-friction hydraulic cylinder to ensure accurate force value transmission. In order to reduce the friction when the test sub-disk moves up and down and improve the accuracy of friction force (moment) measurement, linear bearing guidance is used here; The machine’s spindle speed, revolutions (test period), test force, friction torque (friction coefficient, friction force), friction pair temperature, test time and other parameters are all controlled by the computer. Test data can be collected in real time and the corresponding test curve can be drawn. It can be stored, read, printed out at will, and the data is true and reliable, and no one is affected.

 

Suitable for testing standard:                                                            

ASTM D 2596: Standard Test Method for Measurement of Extreme-Pressure Properties of  

              Lubricating Grease (Four-Ball Method)

ASTM D 2266: Standard Test Method for Wear Preventive Characteristics of Lubricating

              Grease( Four-Ball Method)

ASTM D 4172: Standard Test Method for Wear Preventive Characteristics of Lubricating Fluid

              (Four-Ball Method)

ASTM D 2783:  Standard Test Method for Measurement of Extreme-Pressure Properties of

              Lubricating Fluids (Four-Ball Method) 

Main Technical Specifications:                                                          

1. Axial testing force:60N -10KN;
2. Accuracy of testing force:

   60N-400N ≤±5N;400N-10kN ≤±1

3. Testing force relative error value: ±1%
4. Testing force long time keeping indicating value error: ±1%F.S
5. Spindle speed range:200-2000r/min step less and adjustable;
6. Speed control error:±10r/min;
7. Friction force measurement range:1-300N;
8. Friction force testing error: ±3%
9. Temperature of friction pair control range: room temperature ～200℃;
10. Temperature of friction pair control error: ±2℃
11. Testing time control range: 1 second~999 hours
12. Spindle speed control range: 1~99999999 r
13. Steel ball for test: Special steel ball in four ball wear test machine ,and nor mind diameter is 7mm.
14. Power: 4kw