“…The gear is an element of a large number of tribo-mechanical systems. The geometrical parameters of the hob milling, the accuracy of the profiling and the accuracy of manufacture significantly affect the productivity and machining costs [2,3,7,22,23,27]. In this paper, wear and roughness of the real hob milling tool, the topography and roughness parameters of lateral flank and tooth-face of the model hob milling tools are analyzed before and after gear cutting of cylindrical gears.…”