Patent ID: 7451534

Claim:
A valve seat and valve guide machining tool for fine machining a valve seat and a valve guide in a cylinder head of a combustion engine, the tool comprising: at least two tool parts of which a first tool part has at least a geometrically defined blade and is assigned to machining the valve seat, and a second tool part has at least a geometrically defined blade and is assigned to machining the valve guide, the first and second tool parts connected by a precision interface; wherein the precision interface is configured as a truncated cone connection and has a first flat surface on the first part of the tool and a second flat surface on the second part of the tool which are positioned perpendicular to a center axis of the tool and in the assembled state of the tool abut each other; the first tool part consists of steel; wherein the second tool part is divided and has two sections of which a first section consists of carbide and is assigned to the precision interface and a second section consists of a material which is more ductile than the material of the first part of the tool and which has at least one blade of the second part of the tool.