Metal drilling speeds

Drilling speeds

Charts with recommended speeds for metal drilling. Whenever two different rpm values are shown for the same drill size / metal combination, they represent the recommended speed range.

DRILL SIZES 1 - 10MM	1	2	3	4	5	6	7	8	9	10
Free machining plain carbon steel (resulfurized) 1212, 1213, 1215	11660 12150	5820 6060	3880 4040	2910 3030	2330 2420	1940 2020	1660 1730	1450 1510	1290 1350	1160 1210
Free machining plain carbon steel 1108, 1109, 1115, 1117, 1118, 1120, 1126, 1211	9720 11660	4850 5820	3230 3880	2420 2910	1940 2330	1610 1940	1380 1660	1210 1450	1080 1290	970 1160
Free machining plain carbon steel 1132, 1137, 1139, 1140, 1144, 1146, 1151	3400 6800	1700 3400	1130 2260	850 1700	680 1360	560 1120	480 960	420 840	380 760	340 680
Free machining plain carbon steel (leaded) 11L17, 11L18, 12L13, 12L14	8750 12630	4370 6310	2910 4200	2180 3150	1750 2520	1450 2100	1250 1800	1090 1570	970 1400	870 1260
Plain carbon steel 1006, 1008, 1009, 1010, 1012, 1015, 1016, 1017, 1018, 1019, 1020, 1021, 1022, 1023, 1024, 1025, 1026, 1513, 1514	5830 9720	2910 4850	1940 3230	1450 2420	1160 1940	970 1610	830 1380	730 1210	650 1080	580 970
Plain carbon steel 1027, 1030, 1033, 1035, 1036, 1037, 1038, 1039, 1040, 1041, 1042, 1043, 1045, 1046, 1048, 1049, 1050, 1052, 1524, 1526, 1527, 1541	2430 8750	1210 4370	800 2910	600 2180	480 1750	400 1450	350 1250	300 1090	270 970	240 870
Free machining alloy steel (resulfurized) 4140, 4150	2910 8750	1450 4370	970 2910	720 2180	580 1750	480 1450	410 1250	360 1090	320 970	290 870
Water hardening tool steel W1, W2, W5	8260	4120	2750	2060	1650	1370	1180	1030	910	820
Cold work, oil hardening tool steel O1, O2, O6, O7	4370	2180	1450	1090	870	730	620	540	480	430
Cold work, air hardening tool steel A2, A3, A4, A6, A7, A8, A9, A10	2910 4860	1450 2430	970 1610	720 1210	580 970	480 810	410 690	360 600	320 540	290 480
Stainless steel 201, 202, 301, 302, 304, 304L, 305, 308, 321, 347, 348	4860 5340	2430 2670	1610 1780	1210 1330	970 1070	810 890	690 760	600 670	540 590	480 530
Cast Iron ASTM Class 20, 25, 30, 35, 40	7770 9720	3880 4850	2580 3230	1940 2420	1550 1940	1290 1610	1110 1380	970 1210	860 1080	770 970
Brass C35600, C37700, C36000, C33200, C34200, C35300, C48500, C34000	15550 17000	7760 8490	5170 5660	3880 4240	3100 3400	2580 2830	2210 2420	1940 2120	1720 1880	1550 1700
Bronze C65500, C22600, C65100, C67500	11660 13600	5820 6790	3880 4530	2910 3390	2330 2710	1940 2260	1660 1940	1450 1700	1290 1510	1160 1360
Aluminium 6061-T6, 5000, 6000, and 7000 series, casting alloys	34020 38870	16990 19410	11320 12930	8490 9700	6790 7760	5660 6470	4850 5540	4240 4850	3770 4310	3390 3880

DRILL SIZES 11 - 25MM	11	12	13	14	15	16	18	20	22	25
Free machining plain carbon steel (resulfurized) 1212, 1213, 1215	1050 1100	970 1010	890 930	830 860	770 810	720 760	640 670	580 600	520 550	460 480
Free machining plain carbon steel 1108, 1109, 1115, 1117, 1118, 1120, 1126, 1211	880 1050	810 970	740 890	690 830	640 770	600 720	540 640	480 580	440 520	390 460
Free machining plain carbon steel 1132, 1137, 1139, 1140, 1144, 1146, 1151	310 620	280 560	260 520	240 480	220 440	210 420	190 380	170 340	150 300	130 260
Free machining plain carbon steel (leaded) 11L17, 11L18, 12L13, 12L14	790 1150	730 1050	670 970	620 900	580 840	540 780	480 700	430 630	390 570	350 500
Plain carbon steel 1006, 1008, 1009, 1010, 1012, 1015, 1016, 1017, 1018, 1019, 1020, 1021, 1022, 1023, 1024, 1025, 1026, 1513, 1514	530 880	480 810	450 740	410 690	390 640	360 600	320 540	290 480	260 440	230 390
Plain carbon steel 1027, 1030, 1033, 1035, 1036, 1037, 1038, 1039, 1040, 1041, 1042, 1043, 1045, 1046, 1048, 1049, 1050, 1052, 1524, 1526, 1527, 1541	220 790	200 730	180 670	170 620	160 580	150 540	130 480	120 430	110 390	90 350
Free machining alloy steel (resulfurized) 4140, 4150	260 790	240 730	220 670	210 620	190 580	180 540	160 480	140 430	130 390	110 350
Water hardening tool steel W1, W2, W5	750	690	630	590	550	510	460	410	370	330
Cold work, oil hardening tool steel O1, O2, O6, O7	400	360	330	310	290	270	240	220	200	170
Cold work, air hardening tool steel A2, A3, A4, A6, A7, A8, A9, A10	260 440	240 400	220 370	210 350	190 320	180 300	160 270	140 240	130 220	110 190
Stainless steel 201, 202, 301, 302, 304, 304L, 305, 308, 321, 347, 348	440 480	400 440	370 410	350 380	320 350	300 330	270 290	240 260	220 240	190 210
Cast Iron ASTM Class 20, 25, 30, 35, 40	700 880	650 810	600 740	550 690	510 640	480 600	430 540	390 480	350 440	310 390
Brass C35600, C37700, C36000, C33200, C34200, C35300, C48500, C34000	1410 1540	1290 1410	1190 1300	1110 1210	1030 1130	970 1060	860 940	770 850	700 770	620 680
Bronze C65500, C22600, C65100, C67500	1050 1230	970 1130	890 1040	830 970	770 900	720 850	640 750	580 680	520 610	460 540
Aluminium 6061-T6, 5000, 6000, and 7000 series, casting alloys	3090 3530	2830 3230	2610 2980	2420 2770	2260 2580	2120 2420	1880 2150	1700 1940	1540 1760	1360 1550