FIELD: mechanical engineering. SUBSTANCE: tool has a mandrel with a wedge roller pressed on it. The roller is provided with working portion formed by intersection of two tori at an angle. The radius of the cross-section of the tori, which is a radius of the profile of the roller working portion, varies from its maximum value at the top of the wedge to its minimum value at the base of the wedge. The relationship between the maximum and minimum values of the radii of the tool working profile is presented in the invention description. EFFECT: enhanced fatigue strength. 4 dwg, 1 tbl
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