| 摘要 |
An optimally finished gear (12), (14) has a surface roughness between approximately 5 micro-inches Ra to 10 micro-inches Ra. The reduced surface roughness, when located at the gear teeth (20), can reduce the maximum contact stress by more than fifty percent. Similarly, the subsurface shear stress can be reduced by approximately thirty percent. The reduced contact stress and reduced shear stress results from improved lubrication conditions between the gear teeth (20). Surface roughness greater than 10 micro-inches Ra results in increased contact of the surface peaks, while surface roughness lower than 3 micro-inches is too smooth to retain adequate lubrication between the gear teeth. <IMAGE> |
