Patent ID: 7748934

Claim:
A machine reaming tool, comprising: a shaft ( 2 ); and an exchangeable, single-piece interchangeable head ( 1 ), wherein the interchangeable head ( 1 ), in an axial direction and at each location, thus including the means for fastening the interchangeable head to the shaft, is thinner than a maximal thickness h max , wherein this maximal thickness h max in millimeters is computed from a diameter D 1 of the interchangeable head in millimeters as h max =6 mm+(1/10)·(D 1 −12 mm), wherein the interchangeable head ( 1 ), in a plane, shaft-side end-face ( 15 ) comprises a cutout ( 50 ) designed as a connection element, for the centering fastening of the interchangeable head ( 1 ) on the shaft ( 2 ), wherein the shaft ( 2 ) on an end-side plane surface ( 25 ) comprises a connection lug ( 21 ) projecting from said plane surface ( 25 ) in the axial direction, said lug corresponding to the cutout ( 50 ) of the interchangeable head ( 1 ), wherein the interchangeable head ( 1 ), at least in places, compresses the connection lug ( 21 ) of the shaft ( 2 ) when pressing the interchangeable head ( 1 ) against the shaft ( 2 ) in the axial direction, wherein on the interchangeable head ( 1 ), the cutout ( 50 ) formed as a connection element forms an axially central conical socket ( 11 ) for centering the interchangeable head ( 1 ) on the shaft ( 2 ), and the connection lug is a corresponding conical projection ( 21 ) on the shaft ( 2 ), and wherein the interchangeable head ( 1 ) does not comprise an axially projecting lug for fastening the interchangeable head to the shaft.