Examples of tool solutions 9 PORT HOLES Objective The large diameter must be created in a drilling operation. Must be machined without vibration to obtain narrow diameter tolerances and perfect surface roughness. Result The step drill in pre-form carbide with special internal coolant and centre point makes it possible to increase cutting speed. Reduced machining time No vibration Safe process Excellent surface quality Long tool life Machining process SC step drill Article no. 212891/999997 n = 1675 min -1 vf = 670 mm/min C7 PLUS Solution A Solution B UM tap Article no. EH1480.554 UM thread mill PATENTLÖSUNGEN Article no. 256938.12×014 10 RELIEF VALVE HOLES Objective To create a straight hole meeting high tolerance and surface demands. To reduce the machining time while keeping a reliable process. Result The process strategy with a solid carbide step drill and step reamer reduce the process time and produce a straight hole with tight tolerances and an excellent surface finish. Due to the C7 PLUS™ coating, tool life time is prolonged considerably. SC step drill Article no. 252742/999997 n = 2580 min -1 vf = 568 mm/min Step reamer Article no. 212850/999999 n = 2546 min -1 vf = 891 mm/min HSS tap C7 PLUS C7 PLUS Article no. EN1270096 10
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