Abstract: Breaking through the conventional theory and method with design innovation, a novel roller bearing—deep cavity hollow cylindrical roller bearing is proposed in order to decrease or prevent the stress concentration on the ends of the roller. The research based on theory indicates that the deep cavity hollow cylindrical roller bearing has outstanding performance. With the advantages and without the disadvantages of both logarithmic profile roller bearing and hollow cylindrical roller, the novel bearing is able to eliminate or decrease the sharp edge stresses effect of both contact stresses and equivalent stresses, to prevent super-precision manufacturing and to keep the merits of the hollow roller bearing such as adapting to vibration and impact loads, improving the lubricating and cooling condition, light, less inertial forces on the outer ring and better high speed performance, etc.

Key words: Contact mechanics, Cylindrical roller bearings, Deep cavity hollow roller, Edge stress, Finite element analysis