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The excellent operating properties of the mechanisms are conditioned by the quality design of the geometry of the individual components. Roller and ball bearings, which are frequently used components, have no exception and are an important part of them. One of the important parameters for a geometry design of antifriction bearings elements is sliding velocity. This article discusses the proposed algorithm for calculating sliding velocities between rolling elements and raceways of spherical roller bearings. Sliding velocities caused by different rolling radii along the rolling element profile and thus adversely effect of their abrasion. Using this algorithm can be quantified these adverse effects and the internal geometry of the spherical roller bearings can be modified to minimize the impact of sliding velocities. For this experimental study, a fully parametric 3D virtual model of spherical rolling bearings was created in the PTC/Creo Parametric CAD system and a FEM analysis was done in Ansys/Workbench CAE software. This work was done at University of Žilina, Faculty of Mechanical Engineering, Department of Design and Machine Elements.