How We Do Simulated Lifetime Reliability Test on Automobile Bearing?

Lynn's Bearing Learning Notes--201901

View as a web page Lifetime Reliability for Automotive Bearings Everyone knows as an integral component in any industrial application, the premature failure of a bearing means unplanned downtime with high cost lost. Experience shows seemingly identical rolling bearings operated under identical conditions may not last the same amount of time. In most cases, it is impractical to test a statistically significant number of bearings, so engineers rely on standardized bearing-life calculations to select and size bearings for a particular application. When we're talking about the average lifetime of a bearing, it usually means the calculation of L10 basic rating life. Read more What's "L10"? Basic life L10 as defined in ISO and ABMA standards is the life that 90% of a sufficiently large group of apparently identical bearings can be expected to reach or exceed. The median or average life, sometimes called Mean Time Between Failure (MTBF), is about five times the calculated basic rating life. Service life is the life of a bearing under actual operating conditions before it fails or needs to be replaced for whatever reason. Read more » TBB Clutch Release Bearing Simulated Life Test in accordance with JB/T5312-2011 "Rolling Bearing-Clutch Release Bearing Units for Automobiles " Test Conditions: 1. Axial Loading: 8000N 2. Separation Stroke: 10-12mm 3. Axial Loading Frequency: 60 times/min 4.Central eccentricity: less than 1mm 5. Central angle offset: less than 0.7° Test Results: After 3,050,000 times dynamic clutch tests, any spare parts of release bearing should be in good condition, effective and rotating flexible, no obvious leakage of grease or liquid oil on the bearing surface, no abnormal sound. The vibration value is less than 70dB. Read more » Lynn's Bearing Notes © 2019 Email to Lynn Tan? Want to visit TBB?