FBT = FOUR BALL TESTER
WEIGHT 40 KG CYCLE TIME 1 HOUR
The RAVENOL four-ball tester according to DIN 51350 is used to determine the values for lubricants which are exposed to surface pressure in a system with parts in relative motion to one another. In addition to the shear stability at high pressures, the wear protection behaviour when the pressure build-up is low can also be determined.
The four-ball tester is a common test procedure in the lubricant industry and it is used for product development and quality control.
The four-ball system consists of three fixed balls of the same size (stationary balls) and one rotating ball (load ball). The lubricant being tested is then poured over the stationary balls until they are completely covered. Using a lever device and a staged regulation of the test weights, different loads are generated and the corresponding characteristic values for abrasion, friction and welding are determined.
- The higher the welding force or the lower the wear values of an oil or grease, the better its wear protection when subjected to pressure load.
RAVENOL Transfer Fluid DTF-1 delivers 14,29 % higher performance than the original oil BMW DTF-1.