3 / 2018-12-21 14:28:09

Highly Accelerated Life Test for High Speed Spindle Reliability

High-speed spindle system, highly accelerated life test, failure analysis, bearings

High precision machining tool is one of the key components for modern industry. Machine reliability is therefore highly depended on those components. In this paper the accelerated life test for a high-speed spindle system was developed in order to improve its reliability. A fundamental analysis of all relevant subsystems and components as well as an analysis of the failure modes and their root causes were implemented based on the provided data. Bearings were found as the major failure mode leading to spindle failure. Hence the highly accelerated life test for the spindle was designed with different alternatives of bearings parameters. Results indicated that the life time of spindle was significantly altered by changing the bearings parameters. Reducing pre-tightening force and enlarging contact angle of the bearings can help improving the life time of spindle. The highly accelerated life test can be used in future product design to obtain better life time.