Application: The Four-Ball Tester is a tribological testing instrument used to evaluate the lubricating properties, wear prevention, and extreme pressure (EP) performance of oils, greases, and other lubricants. SPECIFICATIONS Utility:  Lubricant properties Speed: 3000 rpm Load: 10000N Friction Torque: 0 to 16 Nm Test Ball Dia: 12.7 mm Frictional Torque distance: 80mm