Gear Tooth Bending Stress Calculator

Calculate gear tooth bending stress using the Lewis equation and AGMA bending strength methodology.

Tangential force on the gear tooth.
N
Gear module.
mm
Width of the gear tooth.
mm
From AGMA tables. 20° FD: 0.25-0.45 depending on teeth.
Uniform: 1.0, Moderate shock: 1.25, Heavy: 1.75.
Depends on pitch line velocity and quality. 1.0-1.5.

Results

AGMA Bending Stress-MPa
Lewis Form Factor Y-
Lewis Bending Stress-MPa
References: AGMA 2001-D04; Shigley's Ch. 14 — Spur Gears