MagicDrill DRC  Recommended Cutting Conditions Hardness (HB) Cutting Conditions Drill Dia. φDc(mm) Remarks Workpiece Material Cutting Speed n (min-1) Vc (m/min) f (mm/rev) φ8 φ10 φ12 φ14 φ16 φ18 φ20 φ25 Low Carbon SS400 125 120 - 180 n (min-1) 4,780 - 7,170 3,820 - 5,730 3,180 - 4,780 2,730 - 4,090 2,390 - 3,580 2,120 - 3,180 1,910 - 2,870 1,530 - 2,290 Steel S10C~S25C f (mm/rev) 0.11 - 0.20 0.13 - 0.24 0.14 - 0.28 0.17 - 0.32 0.19 - 0.35 0.23 - 0.38 0.25 - 0.41 0.30 - 0.50 S30C~S58C 190 100 - 150 n (min-1) 3,980 - 5,970 3,180 - 4,780 2,650 - 3,980 2,270 - 3,410 1,990 - 2,990 1,770 - 2,650 1,590 - 2,390 1,270 - 1,910 (Annealed) f (mm/rev) 0.13 - 0.24 0.15 - 0.29 0.17 - 0.33 0.19 - 0.36 0.22 - 0.41 0.25 - 0.46 0.28 - 0.48 0.32 - 0.60 Carbon 250 80 - 120 n (min-1) 3,180 - 4,780 2,550 - 3,820 2,120 - 3,180 1,820 - 2,730 1,590 - 2,390 1,420 - 2,120 1,270 - 1,910 1,020 - 1,530 Steel S30C~S58C f (mm/rev) 0.13 - 0.21 0.15 - 0.25 0.18 - 0.31 0.21 - 0.39 0.23 - 0.45 0.25 - 0.53 0.28 - 0.61 0.38 - 0.64 (Heat treated) n (min-1) 1,990 - 2,990 1,590 - 2,390 1,330 - 1,990 1,140 - 1,710 1,000 - 1,490 880 - 1,330 800 - 1,190 640 - 960 300 50 - 75 f (mm/rev) 0.11 - 0.19 0.12 - 0.23 0.16 - 0.28 0.21 - 0.32 0.23 - 0.35 0.25 - 0.41 0.28 - 0.41 0.32 - 0.45 SCM,SCr etc. 180 70 - 95 n (min-1) 2,790 - 3,780 2,230 - 3,030 1,860 - 2,520 1,590 - 2,160 1,390 - 1,890 1,240 - 1,680 1,110 - 1,510 890 - 1,210 (Annealed) f (mm/rev) 0.15 - 0.28 0.16 - 0.35 0.21 - 0.37 0.23 - 0.46 0.25 - 0.46 0.25 - 0.51 0.30 - 0.51 0.35 - 0.60 275 70 - 95 n (min-1) 2,790 - 3,780 2,230 - 3,030 1,860 - 2,520 1,590 - 2,160 1,390 - 1,890 1,240 - 1,680 1,110 - 1,510 890 - 1,210 Coolant (Ref. to Page K31) Alloy Steel f (mm/rev) 0.11 - 0.21 0.14 - 0.25 0.19 - 0.30 0.21 - 0.33 0.23 - 0.37 0.28 - 0.43 0.28 - 0.46 0.32 - 0.58 SCM,SCr etc. 300 60 - 90 n (min-1) 2,390 - 3,580 1,910 - 2,870 1,590 - 2,390 1,360 - 2,050 1,190 - 1,790 1,060 - 1,590 960 - 1,430 760 - 1,150 (Heat treated) f (mm/rev) 0.11 - 0.19 0.12 - 0.23 0.16 - 0.26 0.18 - 0.31 0.21 - 0.33 0.23 - 0.36 0.25 - 0.38 0.30 - 0.50 350 50 - 75 n (min-1) 1,990 - 2,990 1,590 - 2,390 1,330 - 1,990 1,140 - 1,710 1,000 - 1,490 880 - 1,330 800 - 1,190 640 - 960 f (mm/rev) 0.11 - 0.20 0.12 - 0.23 0.16 - 0.25 0.17 - 0.29 0.18 - 0.32 0.20 - 0.36 0.23 - 0.38 0.28 - 0.50 SUS304 220 60 - 80 n (min-1) 2,390 - 3,180 1,910 - 2,550 1,590 - 2,120 1,360 - 1,820 1,190 - 1,590 1,060 - 1,420 960 - 1,270 760 - 1,020 Stainless SUS316 f (mm/rev) 0.11 - 0.19 0.12 - 0.23 0.16 - 0.26 0.18 - 0.31 0.21 - 0.33 0.23 - 0.36 0.25 - 0.38 0.28 - 0.42 Steel n (min-1) 1,990 - 2,790 1,590 - 2,230 1,330 - 1,860 1,140 - 1,590 1,000 - 1,390 880 - 1,240 800 - 1,110 640 - 890 SUS630 300 50 - 70 f (mm/rev) 0.11 - 0.20 0.12 - 0.23 0.16 - 0.25 0.17 - 0.29 0.18 - 0.32 0.20 - 0.36 0.23 - 0.38 0.25 - 0.40 K n (min-1) 4,780 - 6,770 3,820 - 5,410 3,180 - 4,510 2,730 - 3,870 2,390 - 3,380 2,120 - 3,010 1,910 - 2,710 1,530 - 2,170 FC150~FC200 180 120 - 170 f (mm/rev) 0.17 - 0.32 0.20 - 0.37 0.23 - 0.43 0.27 - 0.48 0.30 - 0.55 0.33 - 0.61 0.33 - 0.61 0.40 - 0.74 Gray Cast Iron n (min-1) 3,580 - 4,780 2,870 - 3,820 2,390 - 3,180 2,050 - 2,730 1,790 - 2,390 1,590 - 2,120 1,430 - 1,910 1,150 - 1,530 FC250~FC350 260 90 - 120 f (mm/rev) 0.14 - 0.25 0.16 - 0.31 0.19 - 0.35 0.23 - 0.42 0.26 - 0.47 0.28 - 0.53 0.30 - 0.58 0.36 - 0.70 Drilling FCD400~FCD500 160 60 - 90 n (min-1) 2,390 - 3,580 1,910 - 2,870 1,590 - 2,390 1,360 - 2,050 1,190 - 1,790 1,060 - 1,590 960 - 1,430 760 - 1,150 Nodular f (mm/rev) 0.14 - 0.25 0.16 - 0.30 0.19 - 0.35 0.22 - 0.40 0.24 - 0.45 0.28 - 0.51 0.28 - 0.56 0.34 - 0.67 Cast Iron n (min-1) 1,590 - 2,590 1,270 - 2,070 1,060 - 1,730 910 - 1,480 800 - 1,290 710 - 1,150 640 - 1,040 510 - 830 FCD600~FCD800 250 40 - 65 f (mm/rev) 0.10 - 0.19 0.12 - 0.22 0.14 - 0.25 0.16 - 0.31 0.19 - 0.35 0.23 - 0.51 0.25 - 0.53 0.30 - 0.60 DRA ·As drilling depth increases (3D 5D 8D), feed rates should be reduced. DRC DRX  Reference charts : Workpiece Material Heat treated steel (Hardness 240HB) Vc=80m/min, Wet DRS  Required Power  Torque DRZ 100 DRW 12.0 90 10.0 f=0.45mm/rev 80 [kW] 70 Required Power Ps 8.0 f=0.45mm/rev Torque [N・m] 60 6.0 f=0.35mm/rev 50 40 4.0 30 f=0.25mm/rev f=0.35mm/rev 20 2.0 f=0.25mm/rev f=0.15mm/rev 10 f=0.15mm/rev 0 0 8 10 12 14 16 18 20 22 24 26 8 10 12 14 16 18 20 22 24 26 Drill Dia.IDc [mm] Drill Dia. IDc [mm] K30