This new edition continues to maintain a balance between the theory and application of the technology, giving particular emphasis to tribology in aerospace equipment, steam and gas turbines, motors and generators, transportation and marine equipment, and appliances. Since publication of the first edition, the authors have published 14 journal articles on new research into the field, and this has provided the basis for a thorough update of all material as well as 2 entirely new chapters on seals and bearing failure modes.