Table 17. Speeds and Feeds for Drilling, Reaming, and Threading Plain Carbon and Alloy Steels Table 17. (Continued) Speeds and Feeds for Drilling, Reaming, and Threading Plain Carbon and Alloy Steels
Drilling Reaming
Drilling
Reaming
Threading
Indexable Insert Coated Carbide
HSS
HSS
HSS
HSS
Brinell Hardness Number
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.
Speed (fpm)
Material
125-175 85 175-225 70 225-275 50 275-325 40 325-375 30 375-425 15 175-200 90 200-250 80 250-300 55 300-375 40 375-425 30 150-200 100 200-250 90 250-300 65 300-375 45 375-425 30 125-175 85 175-225 70 225-275 55 275-325 50 325-375 35 375-425 25
55 45 30 25 20 10 60 50 30 25 15 65 60 40 30 15 55 45 35 30 25 15
f s f s
16 50
8 95
8 370 8 365
4 740 4 735
27 105
14 115
83 90
20 115
Plain carbon steels (Continued): 1055, 1060, 1064, 1065, 1070, 1074, 1078, 1080, 1084, 1086, 1090, 1095, 1548, 1551, 1552, 1561, 1566
{
16 75
8 140
8 410 8 355 8 310 8 370 8 365 8 410 8 355 8 335 8 310
4 685 4 600 4 525 4 740 4 735 4 685 4 600 4 570 4 525
26 150
13 160
83 125
20 160
f s f s f s f s f s f s f s f s f s
Free-machining alloy steels (Resulfurized): 4140, 4150
{
16 50
8 95
27 105
14 115
83 90
20 115
(Leaded): 41L30, 41L40, 41L47, 41L50, 43L47, 51L32, 52L100, 86L20, 86L40
{
16 75
8 140
26 150
13 160
83 125
20 160
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
{
11 50
6 85
19 95
10 135
83 60
20 95
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