ASTM D4290 Leakage Trends of Automotive Wheel Bearing Grease in Accelerated Conditions

EUROLAB laboratory provides testing and compliance services within the scope of ASTM D4290 standard. Automobile wheel bearings are exposed to high loads, high speeds and high temperatures. Long-term efficient bearings require a grease that resists mechanical and thermal changes and does not separate, collapse, soften or leak. Grease also needs to resist the build-up of mud, varnish, gum, and lacquer.

This test quantifies bearing leakage and qualitatively reports observations of grease appearance at the end of the test.

This method uses a specially designed hub bearing assembly. A standard amount of test grease is filled into the inner and outer tapered roller bearing cones. An additional standard amount of grease is filled into the hub and the unit is assembled according to the method. A thrust load is applied, the shaft speed and temperature are set, and the bearings are allowed to rotate for a predetermined time.

Values ​​stated in SI units should be accepted as standard. No other units of measurement are included in this standard.

This standard does not purport to address all, if any, safety concerns associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health and environmental practices and to determine the applicability of regulatory restrictions prior to use.

EUROLAB assists manufacturers with ASTM D4290 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.