Tapping drill bit N5951

solidfor cast ironfor aluminum

DC combination drill/taps - two tools in one, which allows the drilling and the threading of a workpiece without changing the tool. It is the optimal solution for CNC-machines, drilling heads, turret lathes and tapping machines. DC combination drill/taps are recommended for use in materials with a tensile strenght up to 750 N/mm2 , such as certain steels, cast iron, aluminium, brass. The core hole must be completely drilled through before the tap starts cutting. In short chipping materials, the depth of thread should not exceed 1.8 x D (type N5952 up to 2 x D). In long chipping materials, the depth of thread should not exceed 1.2 x D. Lubricate as for tapping. On drilling heads and CNC-machines, the ideal speeds for drilling and tapping are selected (see our application chart). If the same speed is selected for both drilling and tapping, we recommend the values indicated below.