Sliding Wear Calculation in Spur Gears

[+] Author and Article Information
Shifeng Wu

Applied Research, John Crane Inc., Morton Grove, Ill.

H. S. Cheng

Center for Engineering Tribology, Department of Mechanical Engineering, Northwestern University, Evanston, Ill.

J. Tribol 115(3), 493-500 (Jul 01, 1993) (8 pages) doi:10.1115/1.2921665 History: Received February 18, 1992; Revised July 15, 1992; Online June 05, 2008


In gear applications where precipitous tooth failure mode such as scoring or scuffing has been avoided, “normal” wear becomes a life-determining factor. In this paper, sliding wear in spur gears, including the considerations of gear dynamics and rough-elastohydrodynamic lubrication, is analyzed. Formulas for equivalent wear rate and tooth wear profile along the line of action are derived. Results show that most materials are removed from both the addendum and dedendum tooth surfaces, and that the highest wear occurs at the beginning of an engagement. This high wear region corresponds to the root of the driving (pinion) teeth and the tip of the driven (gear) teeth. These analytical results correlate well with the practical evidences in AGMA documentation.

Copyright © 1993 by The American Society of Mechanical Engineers
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