ASTM D2783 Four-Ball Extreme Pressure Tester
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The Four-Ball Tribometer is a high-precision laboratory instrument designed to evaluate the wear resistance, extreme-pressure (EP) performance, and friction characteristics of lubricating greases and oils. You can control load, speed, and temperature with high accuracy through pneumatic low/high load cylinders and an air-bearing torque measurement system. The instrument features a touch-screen PC interface for data acquisition and supports optional modules for rolling four-ball tests, shear stability evaluation, and high-resolution wear scar measurement.
Standards
You can perform tests in compliance with international standards, including:
(1) ASTM D2266 – Wear performance of lubricating grease
(2) ASTM D4172 – Wear performance of lubricating oil
(3) ASTM D2596 – Extreme-pressure performance of lubricating grease
(4) ASTM D2783 – Extreme-pressure performance of lubricating oil
(5) ASTM D5183 – Friction coefficient of lubricants (four-ball method)
(6) IP 239 – Lubricant extreme-pressure and wear tests
(7) DIN 51350/1-5 – Four-ball testing of lubricants
(8) ISO/CD 11008 – Extreme-pressure performance of lubricating grease (four-ball method)
(9) IP 300 – Rolling contact fatigue test (optional)
(10) DIN 51350/6 – Shear stability of polymer-containing lubricants (optional)
(11) CEC L-45-A-99 – Transmission oil shear stability test (optional)
(12) ISO 26422:2014 – Shear stability of polymer-containing lubricants (optional)
Parameters
| Parameter | Specification |
|---|---|
| Test Ball Diameter | 12.7 mm (0.5″) |
| Total Load Range | 10–8.000 N |
| Low Load Range | 20–750 N (@6 bar air) |
| High Load Range | 50–8.000 N (@4 bar air) |
| Load Application | Pneumatic |
| Load Measurement | Pressure sensor |
| Load Control | Manual precision regulator |
| Friction Measurement | Strain gauge sensor |
| Torque Reaction Support | Air bearing |
| Speed Range | 60–1.800 rpm |
| Temperature Range | Ambient to 200°C |
| Temperature Sensor | K-type thermocouple |
| Motor | 1.5 kW AC vector motor |
| Control & Data Acquisition | Touch-screen PC interface |
| Data Export | USB |
| Digital Microscope Resolution | 2 mm range 0.01 mm; 4 mm range 0.02 mm |
Features
(1) Touch-screen PC interface enables automated control of speed, temperature, and test duration.
(2) Pneumatic low/high load cylinders provide accurate and repeatable load application.
(3) Air-bearing friction and torque measurement system ensures precise data.
(4) Built-in standard test programs for ASTM, DIN, IP, and ISO/CD methods.
(5) Optional digital microscope allows high-resolution wear scar measurement without sample disassembly.
(6) Expandable modules support rolling four-ball and KRL shear stability tests.
(7) Compact and robust design suitable for laboratory environments.
(8) Manual load adjustment enables precise low-load testing.
Accessories
(1) DM – Digital microscope with camera and PC software for wear scar analysis
(2) R4B – Rolling four-ball test module (optional)
(3) KRL – Shear stability test adapter (optional)
(4) SM – Temperature control module for KRL tests (optional)
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