The Four Ball Wear and EP Tester determines the wear preventive (WP) and extreme pressure (EP) characteristics of lubricating oils and greases using a well-established test configuration — a rotating steel ball pressed against three stationary steel balls coated with the lubricant sample.
This test setup replicates real-world sliding contact conditions to assess anti-wear performance, frictional behavior, and load-carrying capacity.
Test parameters such as rotational speed, applied load, temperature, and duration are precisely controlled through an electronic control system. Frictional torque and normal load are measured via high-sensitivity load cells, with all data continuously recorded and processed using advanced data acquisition and analysis software. The software enables real-time plotting, report generation, and data export for comparative studies.
A high-resolution digital microscope (available as an optional accessory) allows direct, non-contact measurement of wear scar diameters without removing the balls from the pot—ensuring enhanced precision and operator safety.
The microscope, equipped with DinoLite® optics and DinoCapture® software, captures high-definition images, allowing users to record, measure, and archive wear scars with exceptional accuracy.
Built for reliability and precision, the Four Ball Tester supports both Wear Preventive (WP) and Extreme Pressure (EP) tests, making it an indispensable tool for lubricant research, quality assurance, and formulation optimization.
