Table 18. Speeds and Feeds for Drilling, Reaming, and Threading Tool Steels
Drilling Reaming
Drilling
Reaming
Threading
Indexable Insert Uncoated 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
Water hardening: W1, W2, W5 Shock resisting: S1, S2, S5, S6, S7
150-200 85 175-225 50 175-225 45 200-250 50 200-250 45 225-275 30 150-200 60 200-250 50 325-375 30 150-200 55 200-250 40 150-200 45 200-250 35 150-200 60 100-150 75 150-200 60 200-250 45
55 35 30 20 35 30 20 40 30 20 35 25 30 20 40 50 40 30 20
Cold-work (oil hardening): O1, O2, O6, O7
(High carbon, high chromium): D2, D3, D4, D5, D7 { 200-250 30
f s
15 45
7 85
8 360
4 605
24 90
12 95
83 75
20 95
(Air hardening): A2, A3, A8, A9, A10
A4, A6
A7
Hot-work (chromium type): H10, H11, H12, H13, H14, H19
{
8 270
4 450
f s
(Tungsten type): H21, H22, H23, H24, H25, H26
{
(Molybdenum type): H41, H42, H43 Special-purpose, low alloy: L2, L3, L6 Mold steel: P2, P3, P4, P5, P6P20, P21
{
f s
15 45
7 85
8 360
4 605
24 90
12 95
83 75
20 95
High-speed steel: M1, M2, M6, M10, T1, T2, T6 M3-1, M4, M7, M30, M33, M34, M36, M41, M42, M43, M44, M46, M47, T5, T8
{ 225-275 35
T15, M3-2 15 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. 225-275 25
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