有一个钻头，并在至少一个端部的前端7具有切削刃8用于生产芯孔和超过自由梯度螺纹铣削的齿4的生产线和用于轴向移动，旋转，绕其自身轴线和螺旋运动中提供。 期望的是，如果仅仅通过不同直径的工具芯孔中产生基本上与端部切削刃相一致。 这是通过使端部的外径切削刃8比由设置在螺纹铣削的齿的轴向方向的连续数4是由同时生产芯孔和螺纹比生成的线程数少的螺纹铣削齿4的芯线直径等于或小于实现 被提供，并且由服务线程产生螺旋运动具有对应转数生成的线程的数目中的一个。 钻取，并允许它产生不同直径的同一端切削刃芯孔中，由于生产过程中的运动线圈的芯孔的。

There is a drill and having at a front end 7 of at least one end cutting edge 8 for producing a core hole and beyond gradient-free thread-milling teeth 4 for the production of threads, and are provided for the axial movement, rotation, around its own axis and a spiral movement. It is desirable if can be generated substantially coincides with the end cutting edge by only a tool core holes of different diameter. This is achieved by making the outer diameter of the end cutting edge 8 is to or smaller than the core diameter of the thread-milling teeth 4 are the same by the number of axially arranged behind one another thread-milling teeth 4 is smaller than the number of generated threads by simultaneous production of the core hole and threads is provided and by which the threads generating serving helical motion a number of generated threads having corresponding number of rotations. The Drill and permits it to generate the same face cutting edge core holes of different diameter, since the production of the core hole is effected during the helical movement.