ISO D=12-13.9 D=14-15.9 D=16-17.9 D=18-19.9 D=20-21.9 D=22-23.9 D=24-25.9 INDEXABLE DRILLS USER GUIDE Material Groups Recommended Machining Conditions Feed vs. Drill Diameter Tensile Strength Rm Hardness Mtl. VC Material Condition [N/mm2] HB No. m/min mm/rev < 0.25 %C Annealed 420 125 1 ≥ 0.25 %C Annealed 650 190 2 80-100-120 Non-alloy steeland cast steel,< 0.55 %CQuenched andtempered 850 250 3 0.30 0.36 0.45 0.48 0.51 0.54 0.570.390.450.510.570.600.630.66 free cutting steel Annealed 750 220 4 70-85-100 0.45 0.51 0.57 0.63 0.66 0.69 0.72 P ≥ 0.55 %C Quenched andtempered 1000 300 5 50-65-80 Annealed 600 200 6 70-90-110 Low alloy and cast steel (lessthan 5% of alloying elements) 930Quenched andtempered10002753007870-85-10050-65-800.330.360.39 0.42 0.45 0.48 0.510.390.420.480.510.540.570.600.420.480.540.600.630.660.69 1200 350 9 40-50-60 High alloyed steel, caststeel and tool steelAnnealed 680 200 10 50-70-90 0.27 0.30 0.33 0.36 0.39 0.42 0.45Quenched andtempered11000.330.360.390.420.450.480.513251140-60-800.360.390.420.450.480.510.54 Ferritic / pearlitic 180 15 90-125-140 Gray cast iron (GG) Pearlitic /martensitic 260 16 80-110-120 0.40 0.45 0.54 0.60 0.66 0.72 0.78 K Nodular cast iron (GGG) Ferritic 160 17 90-135-160 0.60 0.66 0.72 0.78 0.84 0.90 0.96 Pearlitic 250 18 80-110-120 0.78 0.84 0.90 0.96 1.02 1.08 1.14 Ferritic 130 19 90-125-140 Malleable cast iron Pearlitic 230 20 80-110-120 Recommended cutting data 75