The Kennametal Narrow Slotting (KNS) cutter has been developed to ease some of the issues associated with this common machining operation.

Kennametal’s 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, says the company. 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. Cutter diameters range from 63 to 250 mm and, depending on the body size, arbor or shell mounting (or both) is possible.
Three insert grades are offered with the KNS programme. KCU25 and KCPM40 are multi-phase PVD grades that provide edge stability and wear characteristics in steels, stainless steels and high-temperature alloys, even at elevated feeds and speeds, says the company. KCPK30 is a CVD-coated grade suitable for rough milling and the general machining of steels and cast iron.
Good carbide is important, but so too is insert geometry. Thanks to a positive rake geometry and special edge preparation, KNS inserts are free-cutting without sacrificing the edge toughness needed in most slotting applications. What´s more, SGP geometry is said to promote excellent chip flow, curling even the stringiest materials into tight, easily-evacuated Cs and 9s.
The symmetrical Easy-X wrench design means no more digging in the chip pan for lost screws and inserts, no more wedges or clamps to misplace; simply pop the wrench into the cutter body, give it a twist, and the insert is replaced, even in tight quarters. Each cutter body and wrench is also clearly marked, so there is no chance of damaging the cutter body by using the wrong tool.
For further information www.kennametal.com