Application Guide

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Drills - Technical Info
Drills
- Tech Info
Spotting for
HSS/Cobalt Drills
Spotting for
Carbide Drill
Spotting for
HSS/Cobalt Drills
Spotting for
Carbide Drill
Selecting the Correct Spotting Drill
Select a spotting drill with a point
angle = to or > Greater than the final
drill point angle.
The spot drill diameter should be
30% less than your drill diameter.
Select a spotting drill with a point
angle < Less than the final drill point
angle.
The spot drill diameter should be
30% less than your drill diameter.
Spotting for Carbide Drills Spotting for HSS/Cobalt Drills
N/C Spotting Drills Speeds & Feeds
Material Grades SFM
Tool Diameter (IPR)
1/8 3/16 1/4 3/8 1/2 5/8 3/4
(.1250) (.1875) (.2500) (.3750) (.5000) (.6250) (.7500)
P - Steels
High Strength Tool Steel A2, D2, P20, H11, H13, S2, 01 80-175 .0008-.0.0030 .0020-.0040 .0020-.0050 .0030-.0060 .0030-.0060 .0040-.0080 .0050-.0100
Low Carbon
A36, 12L14, 12L15, 1005, 1018,
1020, 1108-1119, 1213-1215, 1513-
1518, 4012, 5015, 9310
100-175 .0010-.0030 .0020-.0040 .0025-.0050 .0030-.0080 .0040-.0100 .0050-.0120 .0060-.0130
Medium Carbon
1040-1095, 1140-1151, 1330-1345,
520-1572, 4023-4063, 4120-4161,
4330-4340, 4620-4640, 8620-8660,
8740-8750, 6150, 51000, 52100
100-175 .0010-.0030 .0020-.0040 .0025-.0050 .0030-.0080 .0040-.0100 .0050-.0120 .0060-.0130
M - Stainless Steels
Austenitic 301-304L, 310, 316L, 321, 347 80-175 .0008-.0030 .0020-.0040 .0020-.0070 .0030-.0070 .0040-.0080 .0040-.0100 .0050-.0110
Martensitic 403, 410, 416, 420, 430, 431, 440 80-150 .0008-.0030 .0016-.0040 .0020-.0040 .0020-.0070 .0030-.0080 .0040-.0100 .0050-.0110
Precipitation Hardening
12/8, 15/5, 17/4, AM-350/355/363,
PH13-8MO, PH14-8/MO
80-175 .0008-.0030 .0016-.0040 .0020-.0040 .0020-.0070 .0030-.0080 .0040-.0100 .0050-.0110
K - Cast Irons
Ductile A536, J434, 60-40-18 125-200 .0020-.0040 .0020-.0050 .0030-.0060 .0040-.0060 .0050-.0080 .0060-.0100 .0070-0120
Gray A48, A436, A319, Class 20, G4000 100-200 .0020-.0040 .0020-.0050 .0030-.0060 .0040-.0060 .0050-.0080 .0060-.0100 .0070-0120
Malleable A220, A602, J158 125-175 .0016-.0030 .0020-.0040 .0020-.0040 .0030-.0060 .0040-.0080 .0050-.0100 .0060-.0120
N - Non-Ferrous
Aluminum Alloys 2014, 2024, 6061, 7075 250-500 .0020-.0040 .0030-.0060 .0035-.0080 .0040-.0100 .0060-.0120 .0070-.0140 .0080-.0150
Aluminum High Silicon A380, A390 175-300 .0015-.0030 .0020-.0050 .0030-.0070 .0030-.0080 .0050-.0100 .0060-.0120 .0070-.0130
Brass/Bronze
Aluminum Bronze, Low Silicon
Bronze
125-300 .0016-.0040 .0020-.0050 .0025-.0060 .0030-.0070 .0040-.0080 .0050-.0100 .0060-.0110
Composites
G-10, Fiberglass, Graphite, Graphite
Epoxy, Plastics
150-300 .0020-.0040 .0020-.0050 .0020-.0060 .0030-.0070 .0050-.0080 .0060-.0100 .0070-.0120
Copper 150-300 .0020-.0040 .0020-.0050 .0020-.0060 .0030-.0070 .0050-.0080 .0060-.0100 .0070-.0120
Magnesium 200-500 .0020-.0040 .0020-.0050 .0020-.0060 .0030-.0070 .0050-.0080 .0060-.0100 .0070-.0120
Titanium
Commercially Pure, 6Al-4V, ASTM
1/2/3, 6Al-25N-4Zr-2Mo-Si, Ti-8Al-
1Mo, Ti-8Al-4Mo
150-200 .0016-.0030 .0018-.0032 .0020-.0040 .0030-.0060 .0040-.0080 .0050-.0100 .0060-.0110
S - High Temp Alloys
Cobalt Base
Stellite, HS-21, Haynes 25/188, X40,
L605
80-150 .0008-.0020 .0009-.0025 .0010-.0040 .0020-.0050 .0030-.0080 .0040-.0100 .0050-.0120
Iron Base
Incoloy 800-802, Multmet N-155,
Timkin 16-25-6, Carpenter 22-b3
150-200 .0010-.0030 .0020-.0040 .0025-.0050 .0030-.0080 .0040-.0100 .0050-.0120 .0060-.0130
Nickel Base
Inconel 625/718, Inco 700, 713C,
718, Monel 400-401, 404, K401,
Rene, Rene 41 & 95 Hastelloy, Wasp-
oloy, Udimet 500 & 700
100-150 .0016-.0030 .0018-.0035 .0020-.0040 .0030-.0070 .0040-.0100 .0050-.0120 .0060-.0130
NOTE: Speeds and Feeds listed are estimated and will vary by application.
These tools can be found on pages 224-225.