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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
DrillingReaming
HSSHSSCarbide
Free Machining Plain Carbon Steels (Resulphurized)
1212, 1213, 1214100-150HR, A12080400
150-200CD12580350
1108, 1109, 1115, 1117,
1118, 1120, 1126, 1211
100-150HR, A11075375
150-200CD12080350
1132, 1137, 1139, 1140,
1144, 1146, 1151
175-225HR, A, N, CD10065350
275-325Q and T7045250
325-375Q and T4530175
375-425Q and T3520100

Free Machining Plain Carbon Steels (Leaded)
11L17, 11L18, 12L13, 12L14100-150HR, A, N, CD13085400
150-200HR, A, N, CD12080375
200-250N, CD9060275

Plain Carbon Steels
1006, 1008, 1009, 1010, 1012,
1015, 1016, 1017, 1018, 1019,
1020, 1021, 1022, 1023, 1024,
1025, 1026, 1513, 1514
100-125HR, A, N, CD10065300
125-175HR, A, N, CD9060275
175-225HR, N, CD7045200
225-275CD6040175
1027, 1030, 1033, 1035,
1036, 1037, 1038, 1039,

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

1050, 1052, 1524, 1526,
1527, 1541
125-175HR, A, N, CD9060250
175-225HR, A, N, CD7550200
225-275N, CD, Q and T6040150
275-325Q and T5030120
325-375Q and T3520100
375-425Q and T251580
1055, 1060, 1064, 1065,
1070, 1074, 1078, 1080,
1084,1086, 1090,1095,
1548, 1551, 1552, 1561, 1566
125-175HR, A, N, CD8555250
175-225HR, A, N, CD7045200
225-275N, CD, Q and T5030140
275-325Q and T4025110
325-375Q and T302090
375-425Q and T151070

Free Machining Alloy Steels (Resulphurized)
4140, 4150175-200HR, A, N, CD9060250
200-250HR, N, CD8050225
250-300Q and T5530200
300-375Q and T4025150
375-425Q and T3015100

Free Machining Alloy Steels (Leaded)
41L30, 41L40, 41L47, 41L50,
43L47, 51L32, 52L100, 86L20, 86L40
150-200HR, A, N, CD10065285
200-250HR, N, CD9060250
250-300Q and T6540200
300-375Q and T4530150
375-425Q and T3015110

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
125-175HR, A, N, CD8555250
175-225HR, N, CD7045225
225-275CD, N, Q and T5535200
275-325Q and T5030150
325-375Q and T 3525125
375-425Q and T251590
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
175-225HR, A, N, CD7550200
225-275N, CD, Q and T6040175
275-325N, Q and T4530150
325-375N, Q and T3015100
375-425Q and T201580
E51100, E52100175-225HR, A, CD6040200
225-275N, CD, Q and T5030125
275-325N, Q and T3525100
325-375N, Q and T302080
375-425Q and T201050

Ultra High Strength Steels (Not AISI)
AMS6424, AMS6421 (98B37 Mod.), AMS6422 (98BV40),
AMS6427, AMS6428, AMS6430, AMS6432,
AMS6433, AMS6434, AMS6436, AMS6442,
300M, D6ac
220-300A5030180
300-350N3520125
350-400N201090

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

18% Nickel Grade 300, 18% Nickel Grade 350
250-225A5030175

Nitriding Steels
Nitralloy 125, Nitralloy 135, Nitralloy 135 (Mod.), Nitralloy 225,
Nitralloy 230, Nitralloy N, Nitralloy EZ, Nitralloy I
200-250A6040175
250-300N, Q and T3520125
TCT-Reamer-Chart

Recommended material for

Hole DiameterMaterial Left (Diameter)
.090-.170.005-.010
.171-.280.008-.012
.281-.880.010-.016
.881-2.50.015-.030
0500-Drill

Feeds for Drilling

FeedsDiameter
.001-.003 IPR.1250 or less
.002-.006 IPR.1250-.250
.004-.010 IPR.250-.500
.007-.015 IPR.500-1.00
.010-.025 IPR1.00 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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