WDX drills cut faster

This is achieved through the optimised positioning of insert seat pockets in a central and peripheral position, while introducing a high performance, economical, four cornered insert type WDXT, which can be clamped in either position. Designed as a workhorse for rapid hole making, the balanced design eliminates vibration at the entry point (where the drill enters the workpiece - an unbalanced cut contributes to edge chipping), and significantly reduces high cutting forces at the exit point (often caused by the hole reducing in diameter at the exit point - a condition caused by insert wear). The high shear geometry reduces the cutting force, enabling higher productivity through increased feed rates, adding as much as 50% extra productivity to every machining hour. Sumitomo offers three chip-breakers, comprising: general purpose (G type); low feed (L type); and high feed (H Type), these claimed to control chip evacuation in a wide range of workpiece materials within the designated ISO range specified as P/M/K/S. Complimenting the balanced cut design are two newly developed Super ZX coated carbide grades, which utilise Sumitomo's proven nano thickness coating layer technology comprising 1000 alternating layers of TiALN and AlCrN just 10 nanometres thick (1nanometre =1 billionth of a metre). This advanced technology uplifts the previous ZX coating hardness value of 4000Hv by another 40%, while raising oxidation temperatures by 200 °C to significantly increase tool life and maintain a sharp wear and heat resistant cutting edge. Super ZX grade ACP300 is suitable for steels including stainless steels and high temperature alloys and it's sister grade ACK300 is suitable for cast and ductile irons. Both grades provide extreme resistance to wear and heat at the cutting edge enabling optimised cutting conditions, increased productivity and reduced frequency of insert changes through loss of hole size caused by tool wear. Typical cutting speeds for a 25mm drill average 130 m per minute for high alloy steels and ductile cast iron, while the smooth cutting condition improves surface finish and hole geometry Suitable for holes ranging from 13mm - 55mm diameter and hole to diameter length ratios of 2xD 3xD and 4xD, the WDX drill bodies are protected from chip damage by a specially developed hard surface treatment which increases durability and rigidity providing stable drilling in a variety of applications. In addition to drilling holes, the WDX drill features multi function capability and is suitable for hole widening, spot facing, external turning and internal boring whilst blind hole drilling is easily achieved because the inserts cutting edges generate an almost flat face at the bottom of the hole.