Model: KR-AW20
This automatic four-ball machine lubricating grease anti-wear 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-seizure 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 four-ball friction tester can also do long-term anti-wear tests of lubricants, determine the friction coefficient, and record friction and temperature curves. With special accessories, simulation tests of end-face wear and materials can also be carried out.
The design principle of this four ball wear scar test machine is based on the loading stability of the lever four-ball machine, combined with the loading characteristics of the servo valve. The servo motor, air spring, and closed-loop control software can realize automatic resetting, automatic loading, automatic maintenance, automatic testing, automatic unloading, automatic Measure the wear scar diameter and take pictures, one-key operation, one-key data storage, fast test speed, minimal error, good repeatability, no pollution, no noise, and high efficiency.
GB/T12583-98, Determination of Extreme Pressure Performance of Lubricants (Four Ball Machine Method);
GB3142-82, Determination of the bearing capacity of lubricants (four-ball method);
SH/T0189-92, Determination of Lubricant’s Antiwear Performance (Four Ball Machine Method);
SH/T0202-92, determination method of extreme pressure performance of lubricating grease (four-ball machine method);
SH/T0204-92, Determination of anti-wear performance of grease (four-ball machine method).
ZBE34007-87 (Four ball method anti-wear test method).
ASTM D4172
Technical Parameters
| NO. | Project Name | Technical Parameters |
| 1 | Test force | |
| 1.1 | Axial test force working range | 10～10000N |
| 1.2 | Relative error of test force indication | ±1％ |
| 1.3 | Automatically maintain the indication error when the test force is long | ±1％F.S |
| 2 | Friction torque | |
| 2.1 | Friction torque measurement range | 0～13500N.mm |
| 2.2 | Relative error of friction torque indication | ±3％ |
| 3 | Spindle speed | |
| 3.1 | Spindle frequency conversion speed regulation range | 10～2000r/min |
| 3.2 | Spindle speed error | ±5r/min |
| 4 | Oil tank stroke | ＞45mm |
| 5 | Taper of spindle bore | 1：7 |
| 6 | Testing machine heating system | |
| 6.1 | Heater working temperature range | Room temperature～250℃ |
| 6.2 | Temperature control accuracy | ≤2℃ |
| 7 | Test machine spindle control | |
| 7.1 | Test machine time display and control range | 1～99999s or 1-99999min |
| 7.2 | Test machine revolution display and control range | 999999999 |
| 7.3 | The maximum torque of the main motor of the testing machine | 2.3N.m |
| 8 | Amount of oil used in one test | About 10ml |
| 9 | Special standard steel ball diameter | Ф12.7 |
| 10 | External dimensions of the testing machine (length×width×height mm) | About 1160×750×1640 |
| 11 | Test machine net weight | About 400kg |
| 12 | Rated power of testing machine | 5.5KW |