The Four Ball Tester, designed and developed by Magnum Engineers, is a precision tribological test system conforming to ASTM and IP standards for comprehensive evaluation of the frictional, wear preventive (WP), and extreme pressure (EP) characteristics of lubricating oils and greases. The instrument operates on the well established four-ball test methodology, wherein one rotating hardened steel ball of 12.7 mm diameter is brought into contact with three stationary balls, all immersed in the lubricant under test. During the test, a controlled axial normal load is applied through an advanced servo-pneumatic closed-loop loading system, while the upper ball is driven at a predefined rotational speed.


TechnicalSpecifications

1. Test Configuration:One rotating ball against three stationary balls
2. Test Ball: AISI 51200 Steel ball ,Ø12.7mm
3. Rotational Speed: Upto2000 RPM,closed-loop controlled
4. Load Application: Servo-pneumatic closed-loop loading
5. Maximum Normal Load: Upto1000 kg
6. Friction Measurement: Digital load cell with real-time CoF calculation
7. Temperature Control: Ambient to 75°C,closed-loop heating
8. Data Acquisition: PC-based real-time monitoring and logging
9. Measured Parameters: Applied Normal Load,Friction force,CoF,RPM,Temperature
10. Utilities: 440VAC,50Hz,3Ph;clean,dry compressed air
11. Optional Capability: KRL shear stability attachment