Wheel Bearing Leakage Tendencies

Wheel Bearing Leakage TendenciesASTM D4290

Purpose

Evaluate wheel bearing grease leakage tendencies

Brief Description

The same automotive spindle used in ASTM D3527 is used for this determination of oil release from the grease. The test runs for only 20 hours at 160°C under a thrust loading of 111 N and at 1000 rpm. The oil and grease released from the larger tapered roller bearing are collected, weighed, and reported at the end of the test. The condition of the test bearings is also reported. Mechanical stability and oil viscosity are important contributors to low oil release as measure by this test. The heating elements in the test chamber are evident in the photo of the equipment used for this test and the D3527 method.