The Four Ball Tester is used to test the Wear Preventive (WP) and Extreme Pressure (EP) characteristics of greases and lubricating oils in sliding steel-on-steel applications. The point contact interface is obtained by rotating a 12.7mm diameter steel ball under load against three stationary steel balls immersed in the lubricant. The normal load, frictional force, and temperature can be monitored using trop. software, the supplied Windows-based Data Acquisition Software. The rotating speed, normal load, and temperature can be adjusted in accordance with published ASTM and IP test standards…