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
16 75
8 140
8 410 8 355 8 335 8 310 8 325 8 270 8 325 8 410
4 685 4 600 4 570 4 525 4 545 4 450 4 545 4 685
26 150
13 160
83 125
20 160
50 (40) f s 40 (30) f s 30 (25) f s 15 (20) f s 15 (10)
175-225 75 (60) 225-275 60 (50) 275-325 45 (35) 325-375 30 (30) 375-425 20 (20) 220-300 50 300-350 35 350-400 20 250-325 50 200-250 60
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) { Ultra-high-strength steels (not AISI): AMS 6421 (98B37 Mod.), 6422 (98BV40), 6424, 6427, 6428, 6430, 6432, 6433, 6434, 6436, and 6442; 300M, D6ac Maraging steels (not AISI): 18% Ni Grade 200, 250, 300, and 350 Nitriding steels (not AISI): Nitralloy 125, 135, 135 Mod., 225, and 230, Nitralloy N, Nitralloy EZ, Nitrex I
11 50
6 85
19 95
10 135
83 60
20 95
30 20 10 30 40
f s f s f s f s f s
16 75
8 140
26 150
13 160
83 125
20 160
300-350 35 4 525 The two leftmost speed columns in this table contain traditional Handbook speeds for drilling and reaming with HSS steel tools. The section Feed Rates for Drilling and Reaming contains useful information concerning feeds to use in conjunction with these speeds. 20 8 310 HSS Drilling and Reaming: The combined feed/speed data for drilling are based on a 0.60-inch diameter HSS drill with standard drill point geometry (2-flute with 118 ° tip angle). Speed adjustment factors in Table 22 are used to adjust drilling speeds for other feeds and drill diameters. Examples of using this data are given in the text. The given speeds and feeds for reaming are based on an 8-tooth, 25 ∕ 32 -inch diameter, 30 ° lead angle reamer, and a 0.008-inch radial depth of cut. For other feeds, the correct speed can be obtained by interpolation using the given speeds if the desired feed lies in the recommended range (between the given values of optimum and average feed). If a feed lower than the given average value is chosen, the speed should be maintained at the corresponding average speed (i.e., the highest of the two speed values given). The cutting speeds for reaming do not require adjustment for tool diameters for standard ratios of radial depth of cut to reamer diameter (i.e., f d = 1.00). Speed adjustment factors to modify tool life are found in Table 15e.
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