For use in aluminium and cast iron materials, Mapal has also developed the Tritan-Drill-Alu and the Tritan-Drill-Iron. Thanks to creative tool geometries, the drills also achieve significant increases in feed rates and, therefore, in performance. The Tritan-Drill-Alu has a polished groove profile matched to aluminium materials, while large chip spaces and sharp cutting edge preparation ensure optimum chip formation and removal.
In cast-iron machining, the Tritan-Drill-Iron features a corner radius design that is said to offer greater stability and wear resistance of the cutting edge.
Finally, the Tritan-Step-Drill-Steel has been developed for stepped bores in tapped drill holes. Until now, only double-edge drills were available for this type of machining operation. Due to their flat chisel edge in the centre, these tools oscillate up and down along the chisel edge, which leads to a high load on the cutting edges and guiding chamfers, and thus to poor results with regard to circularity and cylindrical form.
Based on Mapal’s Tritan-Drill-Steel, the triple-edge technology has been adapted for stepped bores. The Tritan-Step-Drill-Steel has novel point thinning and finely ground chip flutes, so that chips are rolled tightly and broken. Compared with conventional double-edge step drills, Tritan drills can achieve double feed rates, while simultaneously increasing tool life, says Mapal.
