Development of surface texture to improve traction coefficient

Abstract

In a traction drive, which transmits driving force by the shear strength of a traction fluid, surface texture is thought to the an important factor affecting traction performance. In this study, the effect of surface texture was examined with the aim of improving the traction coefficient in the viscous region. Three textures-dimple, transverse and longitudinal-were examined using a 4-roller tester that enabled tests to be conducted under high pressure and high rolling speed. As a result, it was found that the longitudinal surface texture is the best for improving the traction coefficient.