Rolling Element Bearing Analysis.pdf

ME TECHNICAL PAPER wx From Materials Evaluation, Vol. 70, No. 1, pp: 78–85. Copyright © 2011 The Americ n Society for Nondestructive Testing, Inc. Rolling Element Bearing Analysis by Brian P. Graney* and Ken Starry† A B S T R A C T eleme t beari gs ca be i tegrated to determi e All rotati g machi ery uses beari gs to support beari g health a d the risk of catastrophic failure. the load a d mai tai the cleara ces betwee K EY W O R DS : fu dame tal beari g faults, high- statio ary a d rotati g machi ery eleme ts. More freque cy atural beari g reso a ce i dicator, tha 90% of these machi es have rolli g eleme t discrete freque cy i dicators, time-waveform beari gs. U fortu ately, rolli g eleme t beari gs a alysis, fast fourier tra sform. are pro e to a myriad of premature failures. Introduction A mere 10% of rolli g eleme t beari gs reach their L10 life, the expected life of 90% of similar Rolling element bearings are used in more than 90% of the beari gs u der similar operati g co ditio s. Early rotating machinery found in commercial and industrial appli- cations. Regardless of the application, bearings are categorized failures are attributed to lubricatio , load a d according to size, speed and lubrication