Page 91 - Demo

89GENERAL PURPOSE DRILLINGSUMO-GUNMachining Conditions for MNSNTISOMaterial Condition Tensile Strength [N/mm2] Hardness HB Material Group No. SUMO-GUNV (m/min)Feed vs. Drill DiameterD=10-11.9 D=12-13.9 D=14-15.9 D=16-19.9 D=20-25.9mm/revPnon-alloy steel and cast steel, free cutting steel<0.25% C annealed 420 125 1 80-110-1400.150.180.210.180.210.240.200.230.270.250.300.350.250.300.35%u22650.25% C annealed 650 190 2 80-105-130<0.55% C quenched and tempered 850 250 3 80-100-120%u22650.55% Cannealed 750 220 4 70-90-110quenched and tempered 1000 300 5 50-70-90low alloy and cast steel (less than 5% of alloying elements)annealed 600 200 6 80-100-1200.140.170.210.160.200.240.180.220.260.230.270.310.250.300.35 quenched and tempered930 275 7 70-90-1101000 300 8 50-70-901200 350 9 40-55-70high alloyed steel, cast steel and tool steelannealed 680 200 10 50-70-90 0.120.140.170.150.170.200.180.200.230.200.220.250.220.240.27 quenched and tempered 1100 325 11 40-60-80stainless steel and cast steelferritic / martensitic 680 200 1240-55-700.120.130.150.140.150.170.160.180.200.160.190.210.180.210.24 martensitic 820 240 13Kgray cast iron (GG) ferritic / pearlitic 180 15 90-125-1600.200.230.270.250.280.320.300.330.370.350.400.450.350.420.47pearlitic / martensitic 260 16 80-110-140nodular cast iron (GGG)ferritic 160 17 90-135-180pearlitic 250 18 80-110-140malleable cast ironferritic 130 19 90-125-160pearlitic 230 20 80-110-140Naluminum-wrought alloysnot hardenable 60 2190-155-220 0.250.280.320.300.330.370.350.380.420.400.450.500.450.500.57hardenable 100 22aluminumcast alloys%u226412% Sinot hardenable 75 23hardenable 90 24>12% Si high temperature 130 25 80-120-160Recommended cutting dataMandatory use of emulsion or oil when drillingFor the 400mm long tools please reduce the cutting speed by 20%.