RESEARCH PAPERS: Power Transmission and Gearing

Factors Affecting Fatigue Strength of Nylon Gears

[+] Author and Article Information
J. H. Chen, F. M. Juarbe

The Polymer Corporation, Reading, Pa.

M. A. Hanley

Product & Process Development—Shapes & Parts, The Polymer Corporation, Reading, Pa.

J. Mech. Des 103(2), 543-548 (Apr 01, 1981) (6 pages) doi:10.1115/1.3254951 History: Received March 01, 1980; Online November 17, 2009


The effects of some of the factors which influence fatigue strength of molybdenum disulphide (MoS2 ) filled cast nylon (type 6) gears such as diametral pitch, pressure angle, pitch line velocity, stress level, and lubrication were investigated. It was found that nylon gears, when properly designed and installed, are subject to minimal wear. Premature failures do occur through tooth interference caused by thermal expansion, tooth deflection and creep of the material. The importance of a proper backlash is discussed. Design capacities of nylon gears using formula and tables are presented.

Copyright © 1981 by ASME
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