Life Performance of Automotive Wheel Bearing Grease

Life Performance of Automotive Wheel Bearing GreaseASTM D3527

Purpose

Evaluate grease life in simulated wheel bearing service.

Brief Description

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.