US Patent 7534075 Knife plate and tool for machining bore surfaces

A tool is proposed for metal-cutting machining of bore surfaces with at least one cutter insert (1s, 1′s; 1u, 1′u, 1″u) which is let into the end face (41) of the tool (10) and at least one cutter insert (1s, 1′s; 1u, 1′u, 1″u) which is let into the circumferential face (43) of the tool (10), said cutter inserts (1s, 1′s; 1u, 1′u, 1″u) having at least two geometrically defined cutting edges. Said tool is characterized by the fact that one of the cutting edges of the cutter inserts is embodied as a roughing cutting edge (17, 17′) and the other cutting edge of the cutter inserts is embodied as a finishing cutting edge (19, 19′), and in that the cutting edges are arranged on the two ends of a side edge (15, 15′) of the cutter inserts.