Table 1. Cutting Speeds and Feeds for Turning Plain Carbon and Alloy Steels Table 1. (Continued) Cutting Speeds and Feeds for Turning Plain Carbon and Alloy Steels
Tool Material Coated Carbide
Uncoated Carbide
Ceramic
HSS
Hard
Tough
Hard
Tough
Hard
Tough
Cermet
Brinell Hardness Number a
f = feed (0.001 in/rev), s = speed (ft/min) Metric Units: f 3 25.4 = mm/rev, s 3 0.3048 = m/min Opt. Avg. Opt. Avg. Opt. Avg. Opt. Avg. Opt. Avg. Opt. Avg. Opt. Avg.
Material AISI/SAE Designation
Speed (fpm)
f s f s
17 730 17 615
8 990 8 815
36 300 36 300
17 430 17 405
17 1090
8 1410
28 780 28 755
13 1105
15 1610 13 1400
8 2780 7 1965
15 1345 13 1170
8 2005 7 1640
7 1355 7 1355
3 1695 3 1695
150-200 120 200-250 100
17 865
8 960
13 960
Free-machining alloy steels: (leaded): 41L30, 41L40, 41L47, 41L50, 43L47, 51L32, 52L100, 86L20, 86L40
250-300 300-375 375-425
75 55 50
f s
17 515
8 685
36 235
17 340
17 720
8 805
28 650
13 810
10 1430
5 1745
10 1070
5 1305
125-175 100
17 525 17 355 17 330 17 330 17 525 17 355 17 330 17 330
8 705 8 445 8 440 8 440 8 705 8 445 8 440 8 440
36 235 36 140 36 135 36 125 36 235 36 140 36 135 36 125
17 320 17 200 17 190 17 175 17 320 17 200 17 190 17 175
17 505 17 630 17 585 17 585 17 505 17 630 17 585 17 585
8 525 8 850 8 790 8 790 8 525 8 850 8 790 8 790
28 685 28 455 28 240 28 125 28 685 28 455 28 240 28 125
13 960 13 650 13 350 13 220 13 960 13 650 13 350 13 220
15 1490 10 1230 9 1230 8 1200 15 1490 10 1230 9 1230 8 1200
8 2220 5 1510 5 1430 4 1320 8 2220 5 1510 5 1430 4 1320
15 1190
8 1780 5 1210 5 1150 4 1060 8 1780 5 1210 5 1150 4 1060
7 1040
3 1310
f s f s f s f s
175-225 225-275 275-325 325-35
90 70 60 50
Alloy steels: 4012, 4023, 4024, 4028, 4118, 4320, 4419, 4422, 4427, 4615, 4620, 4621, 4626, 4718, 4720, 4815, 4817, 4820, 5015, 5117, 5120, 6118, 8115, 8615, 8617, 8620, 8622, 8625, 8627, 8720, 8822, 94B17
10 990 8 990 8 960
7 715 7 655 7 575
3 915 3 840 3 740
375-425 30 (20)
Alloy steels: 1330, 1335, 1340, 1345, 4032, 4037, 4042, 4047, 4130, 4135, 4137, 4140, 4142, 4145, 4147, 4150, 4161, 4337, 4340, 50B44, 50B46, 50B50, 50B60, 5130, 5132, 5140, 5145, 5147, 5150, 5160, 51B60, 6150, 81B45, 8630, 8635, 8637, 8640, 8642, 8645, 8650, 8655, 8660, 8740, 9254, 9255, 9260, 9262, 94B30 E51100, E52100 use (HSS Speeds)
175-225 85 (70) f s 225-275 70 (65) f s 275-325 60 (50) f s
15 1190 10 990 8 990
7 1020 7 715 7 655
3 1310 3 915 3 840
325-375 40 (30) 375-425 30 (20)
f s
8 960
7 575
3 740
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