chapter  21
12 Pages

Contact Stresses in Low-Tooth-Count Gearing

Today’s involute gears carry far more power with greater reliability than was once thought possible. Improvements in the material and lubrication and more precise manufacture, which is made possible by modern equipment, are mainly responsible for this. Still, the search for greater strength goes on, as indicated by continuing test programs at many laboratories. As further progress from these standard approaches becomes increasingly difcult, it is worthwhile to look into better load distribution in parallel-axis gears. Gears fail by pitting and wear as well as by tooth breakage. For predicting gear-tooth strength and calculating stresses within the gear-tooth body, an adequate load distribution model is required.