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CHIP CLASS MATERIAL BEING MACHINED MATERIAL EXAMPLES BRINELL HARDNESS CHIP DESCRIPTION TOOL APPLICATION CUTTING SPEED (SFM)
STARTING RANGE*		 FEED RATE (INCHES PER REVOLUTION)
HOLE DIAMETER IN INCHES
GENERAL PURPOSE
G.P.		 COOLANT FED
C.F.		 1/8 1/4 3/8 1/2 5/8 3/4 1 1 1/4 1 1/2
G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F.
20 ALUMINUM ALLOY
     CAST AND WROUGHT		 308.0, 356.0, 360.0, 380.0, 383.0, 390.0,
2024, 3003, 4032, 5052, 6061, 7075		 30-150
(500 kg)		 DISCONTINUOUS FLAKY OR
LONG STRINGY		 DRILL 250-350 375-550 .003 – .005 .004 .007 .005 .008 .006 .010 .006 .011 .007 .014 .009 .017 – .019 –
REAM 150-250 200-300 .004 – .006 .008 .008 .010 .011 .013 .012 .015 .013 .017 .016 .021 .019 .022 .020 .024
COPPER ALLOY
     TOUGH		 101,110, 115 120, 130, 142, 155, 170, 172, 175,
195, 425, 610, 630, 655, 725, 805, 826, 910		 40-200
(500 kg)		 LONG CONTINUOUS DRILL 125-190 225-300 .002 – .005 .004 .007 .005 .008 .006 .009 .007 .010 .008 .012 .010 .014 – .016 –
REAM 50-90 70-105 .005 – .006 .008 .008 .010 .010 .013 .011 .014 .012 .016 .014 .018 .016 .019 .017 .020
LEAD ALLOY Alloys 7, 8, 13, 15
lSb, 4Sb, 6Sb, BSb, 9Sb		 10-20
(500 kg)		 DISCONTINUOUS
TIGHTLY CURLED		 DRILL 350-450 400-500 .003 – .005 .004 .006 .006 .007 .007 .008 .008 .009 .009 .013 .013 .015 – .017 –
REAM 150-250 200-300 .002 – .006 .008 .008 .010 .012 .016 .014 .017 .015 .018 .018 .022 .021 .024 .022 .026
PLASTIC ABS, Acrylic, Allyl, Bakelite, Epoxy, Furan,
Nylon, Polyethylene, Polystyrene, PVC		 – CONTINUOUS DRILL 175-450 – .002 – .004 – .005 – .005 – .006 – .008 – .009 – .010 – .012 –
REAM 90-250 125-300 .004 – .005 .006 .007 .008 .008 .009 .009 .010 .012 .014 .014 .016 .016 .018 .018 .020
ZINC ALLOY AC41 A, AG40A, AMS4803,11 7RO 12,
ZDC NO. 7, GRADES 903,925		 80-100 LONG TIGHTLY CURLED DRILL 300-400 400-500 .003 – .005 .004 .007 .005 .009 .006 .011 .008 .012 .009 .014 .010 .016 – .018 –
REAM 140-210 170-240 .005 – .007 .009 .008 .011 .010 .013 .011 .014 .012 .016 .015 .020 .018 .022 .020 .025
CHIP CLASS MATERIAL BEING MACHINED MATERIAL EXAMPLES BRINELL HARDNESS CHIP DESCRIPTION TOOL APPLICATION CUTTING SPEED (SFM)
STARTING RANGE*		 FEED RATE (INCHES PER REVOLUTION)
HOLE DIAMETER IN INCHES
GENERAL PURPOSE
G.P.		 COOLANT FED
C.F.		 1/8 1/4 3/8 1/2 5/8 3/4 1 1 1/4 1 1/2
G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F.
40 ALUMINUM BRONZE 614, 952-958 40-175 SHORT LOOSELY CURLED DRILL 125-190 200-300 .002 – .005 .004 .007 .005 .008 .006 .009 .007 .010 .008 .012 .010 .014 – .016 –
REAM 50-90 70-105 .004 – .006 .008 .010 .013 .012 .015 .014 .016 .016 .018 .018 .021 .020 .024 .022 .028
COPPER ALLOY / BRASS / BRONZE
     FREE MACHINING		 268, 270, 314, 332, 335, 340, 342, 353
356, 360, 370, 464-467, 485, 838, 945		 10-100 Rb FLAT SMALL DRILL 225-400 300.45 .003 – .005 .004 .007 .005 .008 .006 .009 .007 .010 .008 .012 .010 .014 – .016 –
REAM 100-250 125-300 .005 – .008 .010 .011 .014 .015 .020 .017 .022 .018 .024 .020 .026 .022 .028 .025 .032
MAGNESIUM ALLOY AM60A, AZ21A, AZ91B-C,
HM31A, K1A, ZE41A, ZK40A		 50-90
(500 kg)		 FLAT SMALL DRILL 300-400 450-550 .003 – .005 .005 .006 .006 .007 .007 .008 .008 .009 .009 .013 .013 .015 – .016 –
REAM 130-190 150-250 .005 – .010 .012 .012 .015 .015 .018 .016 .019 .017 .020 .020 .024 .022 .026 .025 .028
NICKEL SILVER 745, 752, 754, 757, 770, 973-978 10-100 Rb LOOSELY CURLED DRILL 125-190 225-300 .002 – .005 .004 .007 .005 .008 .006 .009 .007 .010 .008 .012 .010 .014 – .016 –
REAM 50-90 70-105 .005 – .006 .008 .008 .010 .010 .013 .011 .014 .012 .016 .014 .018 .016 .019 .017 .020
CHIP CLASS MATERIAL BEING MACHINED MATERIAL EXAMPLES BRINELL HARDNESS CHIP DESCRIPTION TOOL APPLICATION CUTTING SPEED (SFM)
STARTING RANGE*		 FEED RATE (INCHES PER REVOLUTION)
HOLE DIAMETER IN INCHES
GENERAL PURPOSE
G.P.		 COOLANT FED
C.F.		 1/8 1/4 3/8 1/2 5/8 3/4 1 1 1/4 1 1/2
G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F.
60 CAST IRON-DUCTILE
     AUSTENITIC (NI-RESIST)		 TYPES D-2, D-2B, D-2C, D-2M,
D-3, D-3A, D-4, D-5, D-5B		 120-275 DISCONTINUOUS
TIGHTLY CURLED		 DRILL – – – – – – – – – – – – – – – – – – – –
REAM 45-70 65-100 .004 – .006 .008 .007 .009 .008 .011 .010 .014 .013 .016 .015 .018 .018 .020 .020 .025
CAST IRON-DUCTILE
     FERRITIC & FERRITIC-PEARLITIC		 GRADES 60-40-18, 65-45-12, 80-55-06,
D4018, D4512, D5506		 140-270 DISCONTINUOUS
TIGHTLY CURLED		 DRILL 150-225 200-250 .002 – .004 .004 .006 .005 .008 .006 .010 .007 .012 .008 .014 .010 .016 – .018 –
REAM 50-90 70-105 .004 – .005 .007 .008 .010 .010 .012 .012 .015 .014 .017 .017 .022 .020 .024 .023 .027
CAST IRON-DUCTILE
     MARTENSITIC & PEARLITIC-MARTENSITIC		 GRADES 100-70-03, 120-90-02,
D7003, DQ&T		 270-400 DISCONTINUOUS
TIGHTLY CURLED		 DRILL – 200-250 – – – .004 – .005 – .006 – .007 – .008 – .010 – – – –
REAM 35-60 50-85 .004 – .006 .008 .007 .009 .008 .010 .009 .011 .010 .013 .012 .014 .014 .017 .016 .019
CAST IRON-GRAY
     FERRITIC & FERRITIC-PEARLITIC		 CLASSES 20, 25, 30, 35, 40
GRADES G1800, G2500, G3000		 120-220 DISCONTINUOUS DRILL 175-300 240-400 .002 – .005 .004 .007 .006 .009 .008 .010 .010 .014 .012 .017 .015 .018 – .019 –
REAM 65-135 95-190 .005 – .008 .010 .010 .013 .011 .014 .013 .017 .016 .020 .020 .024 .022 .028 .025 .030
CAST IRON-GRAY
     PEARLITIC		 CLASSES 45, 50, 55, 60
GRADES G3500, G4000		 220-320 DISCONTINUOUS DRILL 130-225 225-325 .002 – .004 .004 .006 .006 .007 .008 .009 .010 .010 .012 .013 .015 .016 – .018 –
REAM 45-70 55-100 .004 – .006 .008 .008 .010 .009 .012 .010 .014 .012 .015 .014 .018 .018 .020 .020 .026
CAST IRON-MALLEABLE
     FERRITIC & PEARLITIC		 GRADES 32510, 35018, 40010, 45008
GRADES M3210, M4504, M5003		 110-240 DISCONTINUOUS DRILL 125-190 200-250 .002 – .005 .004 .008 .006 .009 .008 .010 .008 .011 .008 .012 .010 .014 – .016 –
REAM 60-120 70-105 .004 – .006 .007 .010 .012 .011 .014 .012 .014 .013 .014 .014 .017 .016 .020 .018 .022
CAST IRON-MALLEABLE
     TEMPERED MARTENSITE		 GRADES 60004, 70003, 80002
GRADES M5003, M8501		 200-320 DISCONTINUOUS DRILL 100-150 200-250 .002 – .004 .004 .006 .005 .007 .006 .008 .007 .010 .008 .012 .010 .014 – .016 –
REAM 45-70 65-100 .004 – .006 .008 .008 .010 .010 .012 .012 .014 .013 .015 .015 .020 .018 .023 .025 .030
CHIP CLASS MATERIAL BEING MACHINED MATERIAL EXAMPLES BRINELL HARDNESS CHIP DESCRIPTION TOOL APPLICATION CUTTING SPEED (SFM)
STARTING RANGE*		 FEED RATE (INCHES PER REVOLUTION)
HOLE DIAMETER IN INCHES
GENERAL PURPOSE
G.P.		 COOLANT FED
C.F.		 1/8 1/4 3/8 1/2 5/8 3/4 1 1 1/4 1 1/2
G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F.
80 STEEL-LOW & MEDIUM STRENGTH
     FREE MACHINING		 1108-1119, 1132-1151, 10LI 7, 10L18,
10L5O, 11L44, 12Ll3, 12L14, 12L15		 100-250 DISCONTINUOUS
LOOSELY CURLED		 DRILL 125-175 150-250 .003 – .004 .005 .008 .006 .010 .008 .012 .009 .014 .010 .017 .012 .018 – .019 –
REAM 70-100 100-150 .005 – .008 .012 .010 .014 .012 .016 .014 .018 .015 .020 .020 .025 .025 .030 .030 .035
STEEL-LOW & MEDIUM STRENGTH
     WROUGHT		 1005-1029, 1030-1050,
1513, 1518, 1524, 1552		 100-375 CONTINUOUS STRINGY DRILL – – – – – – – – – – – – – – – – – – – –
REAM 30-85 40-110 .004 – .008 .009 .009 .011 .011 .013 .013 .015 .015 .017 .018 .022 .020 .024 .022 .026
CHIP CLASS MATERIAL BEING MACHINED MATERIAL EXAMPLES BRINELL HARDNESS CHIP DESCRIPTION TOOL APPLICATION CUTTING SPEED (SFM)
STARTING RANGE*		 FEED RATE (INCHES PER REVOLUTION)
HOLE DIAMETER IN INCHES
GENERAL PURPOSE
G.P.		 COOLANT FED
C.F.		 1/8 1/4 3/8 1/2 5/8 3/4 1 1 1/4 1 1/2
G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F.
100 ALLOY STEEL-LOW & MEDIUM STRENGTH
     FREE MACHINING		 41L30, 41L40, 41L50, 86L20,
4142Se, 4145Te		 100-275 DISCONTINUOUS
TIGHTLY CURLED		 DRILL – 100-220 – – – .005 – .006 – .007 – .008 – .010 – .012 – – – –
REAM 65-100 90-135 .005 – .008 .010 .010 .012 .015 .018 .017 .020 .018 .022 .022 .025 .025 .027 .027 .030
ALLOY STEEL-LOW & MEDIUM STRENGTH 1330, 1345, 1515, 4012, 4130, 4140, 4150, 4320,
4340, 4620, 5130, 8620, 8630, 8645, 9310		 85-375 LOOSELY CURLED DRILL – 100-150 – – – .005 – .006 – .007 – .008 – .010 – .012 – – – –
REAM 40-85 65-100 .005 – .010 .012 .012 .015 .015 .018 .018 .022 .020 .024 .025 .028 .027 .030 .030 .033
STAINLESS STEEL 400 SERIES 409, 410, 414, 420,
430, 436, 442, 446		 135-325 DISCONTINUOUS
TIGHTLY CURLED		 DRILL – 110-150 – – – .004 – .005 – .006 – .007 – .008 – .010 – – – –
REAM 40-90 50-100 .003 – .005 .007 .006 .007 .007 .008 .008 .009 .008 .009 .010 .012 .011 .014 .012 .015
STAINLESS STEEL
     FREE MACHINING		 203 EZ, 303, 303MA, 303Pb, 303 PLUS X,
303Se, 416, 416Se, 420F, 430F, 440F		 135-275 SHORT TIGHTLY CURLED DRILL 100-150 125-190 .002 – .004 .004 .005 .005 .006 .006 .007 .007 .008 .007 .010 .008 .012 – .014 –
REAM 65-100 90-135 .004 – .006 .008 .007 .009 .008 .010 .009 .011 .009 .012 .010 .013 .011 .013 .012 .014
CHIP CLASS MATERIAL BEING MACHINED MATERIAL EXAMPLES BRINELL HARDNESS CHIP DESCRIPTION TOOL APPLICATION CUTTING SPEED (SFM)
STARTING RANGE*		 FEED RATE (INCHES PER REVOLUTION)
HOLE DIAMETER IN INCHES
GENERAL PURPOSE
G.P.		 COOLANT FED
C.F.		 1/8 1/4 3/8 1/2 5/8 3/4 1 1 1/4 1 1/2
G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F.
120 ALLOY STEEL – HIGH STRENGTH, MARAGING
STEEL, NITRIDING STEEL, TOOL STEEL		 50100, 51100, 52100, GRADES 200-350, Nitralloy,
SERIES A2, D2, H13, M50, P20, S7, W1		 175-400 CONTINUOUS WIRY DRILL – 100-150 – – – .004 – .006 – .007 – .008 – .010 – .012 – – – –
REAM 35-70 50-100 .004 – .006 .007 .007 .008 .008 .009 .009 .011 .010 .012 .011 .014 .012 .015 .013 .016
CHIP CLASS MATERIAL BEING MACHINED MATERIAL EXAMPLES BRINELL HARDNESS CHIP DESCRIPTION TOOL APPLICATION CUTTING SPEED (SFM)
STARTING RANGE*		 FEED RATE (INCHES PER REVOLUTION)
HOLE DIAMETER IN INCHES
GENERAL PURPOSE
G.P.		 COOLANT FED
C.F.		 1/8 1/4 3/8 1/2 5/8 3/4 1 1 1/4 1 1/2
G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F. G.P. C.F.
140 HIGH TEMP ALLOY
     NICKEL & IRON		 A-286; Hastelloy C; Inconel 600, 625, 718, 825;
Monel 400; Nimonic 75, 80; Rene 41; Waspaloy		 140-300 CONTINUOUS WIRY DRILL – 60-115 – – – .002 – .003 – .004 – .005 – .006 – .007 – – – –
REAM 15-85 20-115 .003 – .005 .006 .005 .007 .005 .007 .006 .008 .007 .008 .008 .010 .010 .012 .012 .015
STAINLESS STEEL 300 SERIES 301, 302, 304, 309, 314, 316, 321, 330, 347, 385,
Nitronic 32, 33, 40, 50, 60		 135-375 WIRY LOOSELY CURLED DRILL – 70-105 – – – .003 – .004 – .005 – .006 – .007 – .008 – – – –
REAM 40-75 60-90 .003 – .004 .006 .005 .007 .006 .008 .006 .008 .007 .009 .008 .010 .009 .011 .010 .012
STAINLESS STEEL PH SERIES 13-8 Mo, 15-5PH, 16-6PH, 17-4PH,
17-7PH, AM-350, AM-335		 150-440 WIRY LOOSELY CURLED DRILL – 65-100 – – – .002 – .003 – .004 – .005 – .006 – .007 – – – –
REAM 35-70 50-90 .003 – .004 .006 .004 .006 .005 .007 .006 .008 .007 .009 .008 .010 .009 .012 .010 .014
TITANIUM ALLOY 98.9, 99.0, 99.2, 99.5, Ti-6Al-4V,
Ti-6Al-6V2Sn, Ti-8Mn, Ti-10v-2Fe-3Al		 110-380 CONTINUOUS WIRY DRILL – 65-100 – – – .002 – .003 – .004 – .005 – .006 – .007 – – – –
REAM 30-45 40-60 .004 – .006 .008 .008 .010 .010 .013 .011 .014 .011 .014 .012 .016 .013 .016 .014 .018
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