This second edition remains the definitive step-by-step reference on morphology of all significant failure modes in Hertz contact machine elements, including rolling bearings, gears, cams, and followers. New to this edition, along with updates and revisions, is information on failures of vapor phase lubricated rolling bearings and Hertzian contact components made of silicon nitride ceramics, galling and skidmarking failure, based on investigations performed on cam systems. Material is presented in two parts. Part I offers vital introductory material, such as specific background on diagnosis by failure morphology, relevant literature, general concepts of failure classification and distinguishing features. Part II provides more than 500 reference images accompanied by interpretive text. Also includes 50 color images, references, and indices (text, failure mode and failure code list). Free CD available with enhanced images.