ASTM D3527 Life Performance of Automobile Wheel Bearing Grease
Roller bearings in automobiles, agricultural and mining equipment may be exposed to high loads and high speeds during normal operation. During braking, they may also be exposed to high temperatures. The grease in these bearings needs to resist thermal and mechanical degradation under demanding conditions for long periods of time and long distances. This test predicts the relative life of roller bearing grease using a high load and high temperature.
The roller bearing is packed with the sample grease, a load is applied and the system is brought to the test temperature. The bearing is rotated for an induction time to obtain a steady state running torque value. The bearing is put through 20 hours running/4 hours resting cycles until the torque reaches a cut-off value calculated from the steady state running torque. The hours to failure are reported.
Related tests offered by Petro-Lubricant Testing Laboratories:
ASTM D3336 Life of Lubricating Grease in Ball Bearings at Elevated Temperatures (which uses a lighter load, higher speed and ball bearings.) ASTM D4290 Leakage Tendencies of Automotive Wheel Bearing Grease Under Accelerated Conditions (which uses the same apparatus as this test, but runs for only one cycle to determine the amount of grease that leaks from the system.)
Price: $477.00
Sample size: 50 g
Related tests:
- ASTM D3336 – High Temperature Bearing Performance Set Up Fee. (Running time additional at $1.5/hour).
- ASTM D4290 – Leakage of Wheel Bearing Greases
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