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| Workpiece material | Hard- ness | Cutting | conditions n (min-1) | Drill dia. | DC (mm) | marks | ||||||||
| (HB) | Vc (m/min) | ø8 | ø10 | ø12 | ø14 | ø16 | ø | 18 | ø20 | ø | 25 | Re | ||
| f (mm/rev) | ||||||||||||||
| 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 steel | 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 | |
| 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) | 300 | 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 - 0.19 | 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 | ||||
| Ald | 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 | |
| (nneae) | - | 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 | ||
| All tl | 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 | |||
| oy see Ht ttd | 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 | |
| (ea reae) | - | 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 | lant | |
| 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 | Coo | |||
| 350 | 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 | 0.28 | - 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 | |
| Stil tl 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 | ||
| aness see SUS630 | 300 | 50 70 | 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 | |
| - | 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 | |||
| 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 | ||||
| Gray 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 | |
| cast iron FC250FC350 | 260 | 90 120 | 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 | |
| ~ | - | 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 | ||
| 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 cast FCD400~FCD500 | 160 | 60 -90 | 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 | |
| iron FCD600~FCD800 | 250 | 40 -65 | 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 | |
| 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 |
As drilling depth increases (3D 5D 8D), feed rates should be reduced.
Cutting conditions: Workpiece material heat treated steel (Hardness 240HB) Vc = 80 m/min, wet
100 12.0 90
| 10.0 | f=0.45mm/rev 80 |
| 70 | |
| 8.0 | f=0.45mm/rev |
| 60 | |
| 6.0 | f=0.35mm/rev 50 |
| 40 | |
| 4.0 |
| f=0.25mm/rev | 30 | f=0.35mm/rev | ||
| 20 | ||||
| 2.0 | f=0.25mm/rev |
f=0.15mm/rev 10 f=0.15mm/rev
Drill dia. DC [mm] Drill dia. DC [mm]