Speed & Feed Rates

Recommended Cutting Speeds in Feet per Minute for Drilling and Reaming Plain Carbon and Alloy Steels

Material

AISI and SAE Steels
Hardness, HB* Material
Condition*
Cutting Speed, fpm
Drilling Reaming
HSS HSS Carbide
Free Machining Plain Carbon Steels (Resulphurized)
1212, 1213, 1214 100-150 HR, A 120 80 400
150-200 CD 125 80 350
1108, 1109, 1115, 1117,
1118, 1120, 1126, 1211
100-150 HR, A 110 75 375
150-200 CD 120 80 350
1132, 1137, 1139, 1140,
1144, 1146, 1151
175-225 HR, A, N, CD 100 65 350
275-325 Q and T 70 45 250
325-375 Q and T 45 30 175
375-425 Q and T 35 20 100

Free Machining Plain Carbon Steels (Leaded)
11L17, 11L18, 12L13, 12L14 100-150 HR, A, N, CD 130 85 400
150-200 HR, A, N, CD 120 80 375
200-250 N, CD 90 60 275

Plain Carbon Steels
1006, 1008, 1009, 1010, 1012,
1015, 1016, 1017, 1018, 1019,
1020, 1021, 1022, 1023, 1024,
1025, 1026, 1513, 1514
100-125 HR, A, N, CD 100 65 300
125-175 HR, A, N, CD 90 60 275
175-225 HR, N, CD 70 45 200
225-275 CD 60 40 175
1027, 1030, 1033, 1035,
1036, 1037, 1038, 1039,

1040, 1041, 1042, 1043,
1045, 1046, 1048, 1049,

1050, 1052, 1524, 1526,
1527, 1541
125-175 HR, A, N, CD 90 60 250
175-225 HR, A, N, CD 75 50 200
225-275 N, CD, Q and T 60 40 150
275-325 Q and T 50 30 120
325-375 Q and T 35 20 100
375-425 Q and T 25 15 80
1055, 1060, 1064, 1065,
1070, 1074, 1078, 1080,
1084,1086, 1090,1095,
1548, 1551, 1552, 1561, 1566
125-175 HR, A, N, CD 85 55 250
175-225 HR, A, N, CD 70 45 200
225-275 N, CD, Q and T 50 30 140
275-325 Q and T 40 25 110
325-375 Q and T 30 20 90
375-425 Q and T 15 10 70

Free Machining Alloy Steels (Resulphurized)
4140, 4150 175-200 HR, A, N, CD 90 60 250
200-250 HR, N, CD 80 50 225
250-300 Q and T 55 30 200
300-375 Q and T 40 25 150
375-425 Q and T 30 15 100

Free Machining Alloy Steels (Leaded)
41L30, 41L40, 41L47, 41L50,
43L47, 51L32, 52L100, 86L20, 86L40
150-200 HR, A, N, CD 100 65 285
200-250 HR, N, CD 90 60 250
250-300 Q and T 65 40 200
300-375 Q and T 45 30 150
375-425 Q and T 30 15 110

Alloy Steels
4012, 4023, 4024, 4028, 4118,
4120, 4419, 4422, 4427, 4615,
4620, 4621, 4626, 4718, 4720,
4815, 4817, 4820, 5015. 5017,
5020, 6118, 8115, 8615, 8617,
8620, 8622, 8625, 8627, 8620, 8822, 94B17
125-175 HR, A, N, CD 85 55 250
175-225 HR, N, CD 70 45 225
225-275 CD, N, Q and T 55 35 200
275-325 Q and T 50 30 150
325-375 Q and T 35 25 125
375-425 Q and T 25 15 90
1330, 1335, 1340, 1345, 4032,
4037, 4042, 4047, 4130, 4135,
4137, 4140, 4142, 4145, 4147,
4150, 4160, 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
175-225 HR, A, N, CD 75 50 200
225-275 N, CD, Q and T 60 40 175
275-325 N, Q and T 45 30 150
325-375 N, Q and T 30 15 100
375-425 Q and T 20 15 80
E51100, E52100 175-225 HR, A, CD 60 40 200
225-275 N, CD, Q and T 50 30 125
275-325 N, Q and T 35 25 100
325-375 N, Q and T 30 20 80
375-425 Q and T 20 10 50

Ultra High Strength Steels (Not AISI)
AMS6424, AMS6421 (98B37 Mod.), AMS6422 (98BV40),
AMS6427, AMS6428, AMS6430, AMS6432,
AMS6433, AMS6434, AMS6436, AMS6442,
300M, D6ac
220-300 A 50 30 180
300-350 N 35 20 125
350-400 N 20 10 90

Maraging Steels (Not AISI)
18% Nickel Grade 200, 18% Nickel Grade 250,

18% Nickel Grade 300, 18% Nickel Grade 350
250-225 A 50 30 175

Nitriding Steels
Nitralloy 125, Nitralloy 135, Nitralloy 135 (Mod.), Nitralloy 225,
Nitralloy 230, Nitralloy N, Nitralloy EZ, Nitralloy I
200-250 A 60 40 175
250-300 N, Q and T 35 20 125
TCT-Reamer-Chart

Recommended material for

Hole Diameter Material Left (Diameter)
.090-.170 .005-.010
.171-.280 .008-.012
.281-.880 .010-.016
.881-2.50 .015-.030
0500-Drill

Feeds for Drilling

Feeds Diameter
.001-.003 IPR .1250 or less
.002-.006 IPR .1250-.250
.004-.010 IPR .250-.500
.007-.015 IPR .500-1.00
.010-.025 IPR 1.00 and up

Metric-to-Standard Conversion Formula (millimeters to inches)
mm 4 25.4 = inches
Example:
12.70 mm 4 25.4 = .500 inches

Calculating Revolutions Per Minute (RPM) from Surface Footage (SFPM) Diameter
12 x SFPM = RPM
p x diameter

Speeds and Feeds
.002 – .003 per flute per revolution
.0025 x number of flutes
= inches per revolution

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