Gear Failures: how to recognize them, what causes them, how to avoid them

Author:  Eugene Shipley
Source:  Machine Design, Dece 7, 1967
Doc ID:  1967040
Year of Publication:  1967
Abstract:  
A gear has failed when it can no longer efficiently do the job for which it was designed. Cause of failure may range from excessive wear to catastrophic breakage. Failure in a gear train can in many cases be prevented. When it does occur, the proper redesign will ensure a trouble-feee unit. Regardless of when the trouble is rectified-at the design or redesign state-the most important aid to the designer is the ability to recognize the exact type of incipient failure, how far it has progressed, and the cause and cure of the ailment. This article rounds up every type - and the major stages - of gear failures. Included are photographs of actual failures, along with probalbe cause and the most effective remedies.