Tool and method of mechanically roughening

Means (5) for generating a Aufrauprofils on the inner surface of a bore, which is formed as a combined cutting and forming tool, consisting of the following on a base body (9) against the feed direction successively arranged on the base body (9) tools: a machining having at least one geometrically defined cutting edge (11) serving the first tool (7) for producing a preform of a Aufrauprofils, a second tool (21) to form cutting edges (37) of the previously with the first tool (7) generated surface of the bore and one of the forming of the preform of the Aufrauprofils serving third tool (23) in the form of a rotatably mounted roller (39), characterized in that a surface of the roller (39) is at least partially coated with hard solids, and that the roller (39) so long is that it comprises several webs (3) converts the same time.