| 摘要 |
A machine reaming tool comprises a reaming head or interchangeable head ( 1 ) and a shaft ( 2 ), wherein the interchangeable head ( 1 ) is of one piece and may be exchanged, and in the axial direction and at each location, thus including means for the exchange adaptation, is thinner than a maximal thickness h<SUB>max</SUB>, wherein this maximal thickness h<SUB>max </SUB>is computed in millimetres from a diameter D 1 of the interchangeable head in millimetres as h<SUB>max =</SUB>6 mm+(1/10).(D 1 -12 mm). On account of this, a guide portion ( 18 ) for cutters of the reaming head ( 1 ) becomes very much shorter than usual, but despite this ensures an adequate quality of machining. In a preferred embodiment of the invention, the interchangeable head ( 1 ) in a plane shaft-side end-face side end-face ( 15 ) comprises cutout ( 11 ) for the centring fastening on the shaft ( 2 ). The shaft ( 2 ) on an end-side plane surface ( 25 ) comprises a connection lug ( 21 ) which projects out of this plane surface in the axial direction and to which the cutout ( 11 ) of the interchangeable head ( 1 ) corresponds. The interchangeable head ( 1 ) thus has no axially projecting lug. The material requirement is further reduced, the manufacture of the interchangeable head ( 1 ) is simplified, and the material and manufacturing costs are reduced on account of this.
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