Patent ID: 6913428

Claim:
A tool for precise machining of a surface of a bore in a work piece, the tool comprising: a main body with a periphery; a first and a second cutter insert supported at the periphery of the main body, the first and second inserts each being shaped to define at least a respective first cutting edge of the first cutter insert and a second cutting edge of the second cutter insert at the main body for machining the bore surface; the first and second cutter inserts being comprised of respective different first and second materials at least in the region of the at least one first cutting edge and second cutting edge; at least one guide strip provided in the main body for engaging the bore for guiding the positioning of the tool as the tool is rotated; the guide strip being behind the at least one of the first and second cutter inserts in the feed direction of the tool; the at least one guide strip, comprises a second strip at the periphery of the main body and located around the main body opposite the first cutter insert; and the at least one guide strip further comprises a third guide strip at the periphery of the main body and ahead of the first cutter insert by about 90° in the feed direction of the tool.