Table 19. Speeds and Feeds for Drilling, Reaming, and Threading Stainless 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
15 25 15 20
7 45 7 40
8 320 8 250
4 540 4 425
24 50 24 40
12 50 12 40
83 40 83 35
20 51 20 45
f s f s
Free-machining stainless steels (Ferritic): 430F, 430FSe (Austenitic): 203EZ, 303, 303Se, 303MA, 303Pb, 303Cu, 303 Plus X
135-185 90
60 55 45 60 45 25 10 45 35 30 30 50 45 25 15 30 25 15 30 25 10 30 25 20
{ 135-185 85 225-275 70
135-185 90 185-240 70 275-325 40 375-425 20 135-185 65
(Martensitic): 416, 416Se, 416 Plus X, 420F, 420FSe, 440F, 440FSe {
15 25
7 45
8 320
4 540
24 50
12 50
83 40
20 51
f s
Stainless steels (Ferritic): 405, 409, 429, 430, 434 (Austenitic): 201, 202, 301, 302, 304, 304L, 305, 308, 321, 347, 348 (Austenitic): 302B, 309, 309S, 310, 310S, 314, 316
{ 135-185 55 225-275 50 135-185 50 135-175 75
f s
15 20
7 40
8 250
4 425
24 40
12 40
83 35
20 45
175-225 65 275-325 40 375-425 25 225-275 50 275-325 40 375-425 25 225-275 45 275-325 40 375-425 20 150-200 50 275-325 45 325-375 35 375-450 20
(Martensitic): 403, 410, 420, 501
{
(Martensitic): 414, 431, Greek Ascoloy
{
(Martensitic): 440A, 440B, 440C
{
f s
15 20
7 40
8 250
4 425
24 40
12 40
83 35
20 45
(Precipitation hardening): 15-5PH, 17-4PH, 17-7PH, AF-71, 17-14CuMo, AFC-77, AM-350, AM-355, AM-362, Custom 455, HNM, PH13-8, PH14-8Mo, PH15-7Mo, Stainless W {
10 See the footnote to Table 17 for instructions concerning the use of this table. The combined feed/speed data in this table are based on tool grades (identified in Table 16) as follows: coated carbide = 10.
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