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The rollers and/or races in cylindrical and tapered roller bearings should be profiled to relieve high edge stress concentrations caused by their finite lengths and misalignment. In this study, a numerical analysis was performed to investigate the elastohydrodynamic lubrication (EHL) of a Lundberg profile-type cylindrical roller. A finite difference method with fully nonuniform grids and the Newton-Raphson method were used to present detailed EHL pressure distributions and film shapes, as well as the variations in the minimum and central film thicknesses with the profile modification coefficient. In the Lundberg profile, the maximum pressure and min- imum film thickness always occurred near the edges. Proper modification of the Lundberg profile considerably increased the minimum film thickness. Key wordsEHL (), finite line contact (  ), roller profile(  ), Lundberg profile (Lundberg ), profile modification coefficient ( ), Newton-raphson method(- )

Elastohydrodynamic Lubrication Analysis of a Lundberg Profile-type Cylindrical Roller