Research of Force-Fitted Gear : 2nd Report, On the Bending Fatigue Strength of Force-Fitted Gear

Abstract

The authors have compared the strength of force-fitted gear with that of no force-fitted gear, and have examined the variation of the residual stress at the loaded and the opposite side of the root fillet in a bending fatigue test, and have observed the occurring conditions of crack. The following conclusions have been obtained (1) The bending fatigue limits of force-fitted gears are low in comparison with those of no force-fitted gear and the strength of bending test shows the same tendency. (2) Variation aspects of residual stress at the loaded or the opposite side of root fillet of tooth in the bending fatigue test correspond with the growth of crack occurring at the root of tooth.