The KNS has a Double-V design for secure insert retention. A combination of radial and axial positioning not only improves tool life but part accuracy as well. The insert range accommodates slot widths from 1.6 to 6.4 mm. Inserts are available in single- or double-ended cutting edges with either a flat or full radiused cutting edge. The cutter diameters range from 63 to 250 mm and, depending on the body size, arbor or shell mounting (or both) are possible.
The KNS boasts a simple but secure Double-V to accurately locate inserts. There´s no chance of movement as there is with other kinds of slotting and grooving cutters. Tool life improves, as does part quality.
“We're really excited about this new design,” says Scott Etling, Kennametal´s director of global product management for indexable milling. “It´s stronger and more accurate than competing solutions and reduces tooling costs as well. Customers can use both ends of a double-ended KNS insert on shallow slotting applications, then move to a single-ended insert when they need the additional depth. It definitely offers a lot of value.”
Single- and double-ended inserts are available, offering shallow and deep slot capability
KNS also leverages developments in carbide grade technology, says the company. Three insert grades are offered: KCU25 and KCPM40 are multiphase PVD grades that provide excellent edge stability and wear characteristics in steels, stainless steels, and high temperature alloys, even at elevated feeds and speeds, while KCPK30 is a CVD-coated grade suitable for rough milling and general machining of steels and cast iron.
And thanks to a positive rake geometry and special edge preparation, the KNS inserts are free- cutting, without sacrificing the edge toughness needed in most slotting applications. What´s more, the SGP geometry promotes excellent chip flow, curling even the stringiest materials into tight, easily-evacuated ‘Cs’ and ‘9s’. Shim stock and home-made chip hooks are not required.
KNS is also easy to use. The innovative, symmetrical Easy-X wrench design means no more digging in the swarf pan for lost screws and inserts, no more wedges or clamps to misplace—just pop the wrench into the cutter body, give it a twist and the insert is easily replaced, even in tight spaces. Each cutter body and wrench are also clearly marked, so there´s no chance of damaging the cutter body by using the wrong tool.
Last but not least, the integral hub design eliminates the need for drive rings and washers, and greatly contributes to the system´s repeatability and accuracy. And because the hub has dual keyways, the cutters can be staggered in gang-milling scenarios, reducing cutting forces and generating a smooth cutting action.
The KNS system´s dual keyways provide staggered entry in gang milling situations, reducing cutting forces. And the integral hub is both more accurate and rigid than competing systems.
