Life Performance of Automotive Wheel Bearing Grease
Evaluate grease life in simulated wheel bearing service.
The two tapered roller bearings in the photo are placed in a modified automotive wheel hub and rotated at 1000 rpm with a thrust loading of 111 N. Testing continues for 20 hours at 160°C and 4 hours of no rotation at room temperature. Testing ends when the electrical current to operate the drive motor increases to 4 times the values of the new lubricant. Grease performance is influenced by evaporation and oxidation resistance. The test apparatus is also used for ASTM D4290.