Abstract: A tester to estimate co-efficient of friction and determine other properties of a sample lubricant is disclosed. The tester includes a base structure mounted on a compound bearing and a ballpot located on the base structure. The ballpot carries at least three non-rotating balls. Further, the tester includes a bi-direction rotatable motor with a rotatable shaft having a rotating ball. In addition, the tester includes a loading system to load the non-rotating balls against the rotating ball. A load sensor connected to the loading system measures applied load. Furthermore, the tester includes at least one load cell provided in communication with the ballpot to provide at least one output signal. The output signal received from the load cell and the load sensor is recorded and processed in a data acquisition and control system.

Abstract: A tester to estimate co-efficient of friction and determine other properties of a sample lubricant is disclosed. The tester includes a base structure mounted on a compound bearing and a ballpot located on the base structure. The ballpot carries at least three non-rotating balls. Further, the tester includes a bi-direction rotatable motor with a rotatable shaft having a rotating ball. In addition, the tester includes a loading system to load the non-rotating balls against the rotating ball. A load sensor connected to the loading system measures applied load. Furthermore, the tester includes at least one load cell provided in communication with the ballpot to provide at least one output signal.