Page 105 - Demo

103GENERAL PURPOSE DRILLINGThe geometry of the chipformer is designedaccording to its main purpose and directlydepends on the machined material.%u2022 DT - is a chipformer designed for general use with an emphasis on machining steels. Chipformer geometry consists of land whose function is to strengthen the cutting edge, rake angle for chip shaping and deflector used for chip breaking. The combination of an open and shallow chipformer design with a wide land and a low deflector provides a special advantage when drilling at medium and high feeds.%u2022 GF - is a chipformer designed for machining soft materials such as steel belonging to ISO P groups 1-11. The narrow land and positive angle create a deep and closed design. Narrow land improves cutting edge life but is not a barrier to chips getting into the chipformer pocket. The positive angle gives the chips the correct shape, preparing them for deflector breakage when drilling steel at low to medium feeds.%u2022 HD - is a chipformer designed for machining low carbon steel and other soft materials. It features a high deflector that cuts the material into short chips which are easily evacuated along the flutes. The HD chipformer avoids the long and curly chips that may jam the drill%u2019s gullets, damage the tool, poorly affect hole quality, and interrupt the drilling process.%u2022 AL - is a chipformer designed for machining aluminum and other non-metallic materials. Sharp cutting edges, combined with a positive angle, can provide high quality machining of this ductile material.Material GroupsLow Feed HighISOP1-11steelHDGFDT12-13stainless steel ferritic and martensiticHDDTISOM14stainless steel austenitic and duplex (ferritic-austenitic)DTISOK15-20cast iron DTISON21-28nonferrous ALISOS31-37high temp DTISOH38-41hard steel DT