Bending Stress in Gear Teeth Having Circular Arc Profiles—Part 1: Analysis

[+] Author and Article Information
R. Errichello

GEARTECH, Berkeley, Calif.

J. Mech. Des 100(2), 382-394 (Apr 01, 1978) (13 pages) doi:10.1115/1.3453925 History: Received June 20, 1977; Online October 21, 2010


The bending stress in the root fillets of gear teeth having convex, circular-arc profiles has been calculated using a new analytic model. The gear tooth is modeled as a wedge with the load applied at the apex. Graphs of the nondimensional bending stress variation along the tooth length are presented for 14.5 deg, 30 deg, and 47.5 deg normal pressure angle, and 5 to 45 deg helix angles. It is shown that gears with larger helix angles have higher bending stresses for the same value of allowable surface stress.

Copyright © 1978 by ASME
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