The ratios of the cutting force components are (Table 3): These ratios are 4 to 28 percent lower than those defined by the rule of thumb. Similar ratios for the cutting force components are (Table 2): These ratios are 14 to 32 percent lower than those defined by the rule of thumb. The ratios of the feed force to tangential force and the radial force to tangential force are (Table 1): The cutting force components (F X, F Y and F Z) were recorded (Charts 1, 2 and 3 for roughing below) and tabulated (Tables 1, 2 and 3 below). The lathe has 80kW (107 hp) of power, 1,400 Nm (1,032 ft.-lbs.) of torque and a VDI 60 turret. CNMG 120408 FP for finishing, carbide grade is KCP10.Ī Boehringer VDF315C CNC lathe and a Kistler quartz-crystal, three-component toolholder dynamometer, type Z15814, were used for the lab tests.CNMG 120408 MN for semifinishing, carbide grade is KCP10 and.CNMG 120408 RN for roughing, carbide grade is KCP10.25, 2012, Kennametal conducted lab tests at its facility in Fürth, Germany, turning 218-HB alloy steel AISI 4140 (DIN 1.7225 42CrMo4), with the following indexable inserts (ISO specification is in the metric system):
A Kennametal CNMG 120408 RN insert was applied for the roughing test.
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