APPLICATION MATERIAL GROUPS (AMG) CHART  

Jobber Drills printer friendly version Type of Drill
Heavy Duty General Purpose General Purpose General Purpose General Purpose Heavy Duty Hi Helix Lo Helix NAS 907 NAS 907 Heavy Duty Heavy Duty NAS 907 NAS 907 NAS 907 Wide Land Parabolic Wide Land Parabolic Wide Land Parabolic Wide Land Parabolic EZ Style Parabolic Carbide Tipped Carbide Tipped Wide Land Parabolic
HOW TO USE THIS CHART:
Match Your Workpiece Material
Define Hole Drilling Depth
Identify Drill Options
Determine Surface Feet Per Minute (SFM)
See Catalog Page For Sizes
Determine Feed Rate (see below)
 STARTING POINT FOR APPLICATIONS
BASED UPON DRILLING DEPTH
2X Drill Diameter or Less
4X Drill Diameter or Less
6X Drill Diameter or Less
8X Drill Diameter or Less

Note: Contact Precision Twist Drill
Technical Services for applications not listed.

 Material Group BHN
Hardness 		Normal
Chip Form 		Material Type    Surface Feet Per Minute
 1. Steel
1.1 Magnetic Soft Steel, Leaded Steels 120 Extra Long 1116, 1118, 1212 10L18, 12L13, 12L14 115D 100C 100C 115C 100C 125E -- -- 100C -- -- -- -- -- -- 100C 100C 115C -- 100C --   125
1.2 Structural Steel, Case
Carburizing Steel 		200 Medium/Long 30, 55 70, 100 70D 60C 60C 70C 60C 80E -- -- 60C 60C -- -- -- -- -- 60C 60C 70C -- 60C --   75
1.3 Plain Carbon Steel Low, Medium Carbon 250 Long 1008, 1010, 1020 1040, 1055, 1524 75E 65D 65D 75D 65D 85C -- -- 65D 65D -- -- -- -- -- 65D 70D 75D -- 65D --   80
1.4 Alloyed Steel, Medium Carbon,
Tool Steel, Wrought 		250 Long 4140, 4150, 4340 A2, 01, D2 70D 60C 60C 70C 60C 80C -- -- 60C 60C 60C 70C -- -- -- 60C 60C 70C -- 60C --   75
1.5 Alloyed Steel, Hardened and
Tempered Steel, Tool Steel 		250
350 		Long 01, L6, D3, A2, 4140 4150, 4340, 8620, 8630 55C 45B 45B 55B 45B 60C -- -- 45B 45B 45B 55B -- -- -- 45B 45B 55B -- 45B --   60
1.6 Alloyed Steel, Hardened and
Tempered Steel, Tool Steel 		350
400 		Long 01, L6 D3, A2, 4140 4150, 4340, 8620, 8630 -- -- -- -- -- -- -- -- -- -- -- -- 20A 20A 20A -- -- -- 20A -- --   --
 2. Stainless Steel
2.1 Free Machining Stainless Steel 250 Medium 303, 416 430F, 440F 105E 90D 90D 105D 90D 115C -- -- 90D 90D 90D 105D 95D 95D 105D 90D 90D 105D 95D 90D --   115
2.2 Austenitic 250 Long 304, 310, 316 321, Nitronic 50 60D 50C 50C 60C 50C 65C -- -- 50C 50C 50C 60C 55C 55C 60C 50C 50C 60C 55C 45C --   65
2.3 Ferritic + Austenitic, Ferritic,
Martensitic 		300 Long 409, 430, 436 304, 440A, 440C 55C 50B 50B 60B 50B 60B -- -- 50B 50B 50B 60B 55B 55B 60B 50B 50B 60B 55B 50B --   65
2.4 Precipitation Hardened 300 Long 15-5PH Custom 450 17-4PH -- -- -- -- -- -- -- -- -- -- -- -- 30B 30B 30B -- -- -- 30B -- --   --
 3. Cast Iron
3.1 Soft Gray Cast, Ferritic 150 Extra Short ASTM A48 Class 20, 40 G3000 170F 150D 150D 170D 150D 185E -- -- 150D 150D 150D 170D 160D 160D 170D 150D 150D 170D 160D 150D 300D   185
3.2 Soft Gray Cast, Pearlitic > 150
260 		Extra Short ASTM A48 Class 40, 60 G3500, G4000 90E 80D 80D 90D 80D 100B -- -- 80D 80D 80D 90D 85D 85D 90D 80D 80D 90D 85D 80D 300D   65
3.3 Nodular Graphite,
Malleable Cast Iron 		> 150
250 		Medium/Short ASTM A220 Grade 40010
SAE J158 Grade M4504 		ASTM A602 Grade M4504 95D 80C 80C 95C 80C 105B -- -- 80C 80C 80C 95C 85C 85C 95C 80C 85C 95C 85C 80C 225C   105
3.4 Nodular Graphite,
Malleable Cast Iron 		> 250
320 		Medium/Short ASTM A220 Grade 80002
ASTM A602 Grade M8501 		ASTM A220 Grade 90001 60C -- -- 60B -- 65B -- -- 55B 55B 55B 60B 55B 55B 60B -- -- 60B 55B -- 200B   65
 4. Titanium
4.1 Titanium, Unalloyed 200 Extra Long Commercially Pure 99.0   95D 90D 90D -- 90D 105C -- -- -- -- -- -- -- -- -- 90D 95D -- -- 90D --   --
4.2 Titanium Alloy, Cast 270 Medium/Short ASTM B367 Grades C-1 - C-7A 75D 50C 50C -- 50C 85B -- -- -- 50C 50C -- -- -- -- 50C 50C -- -- 50C --   --
4.3 Titanium Alloys > 270
350 		Medium/Short T16AL4V
T16AL6V2SN 		  -- -- -- -- -- -- -- -- -- -- -- -- 20B 20B 20B -- -- -- 20B -- --   --
 5. Nickel
5.1 Nickel, Unalloyed 150 Extra Long Nickel 200, Nickel 230   60D 50C 50C 60C 50C 65C -- -- 50C 50C 50C 60C -- -- -- 50C 50C 60D -- 50C --   65
5.2 Nickel Alloys > 150
240 		Long Nimonic 75
Monel 400 		Hastelloy C
Inconel 600 		-- -- -- -- -- -- -- -- -- -- -- -- 20A 20A 20A -- -- -- 20A -- --   --
5.3 Nickel Alloys >240
400 		Long Nimonic 80
Inconel 718 		Inconel 825 -- -- -- -- -- -- -- -- -- -- -- -- 15A 15A 20A -- -- -- 10A --     --
Carbide Recommended Above 275 BHN
 6. Copper
6.1 Copper Alloys, Wrought 100Rb Extra Long 101, 130, 170 630, 725 -- 90E -- 100E 90E -- 90E -- -- -- -- -- -- -- -- 90E -- 100E -- 90E     110
6.2 Brass, Bronze 200Rh Medium/Short ASTM B30   -- 80D -- 90D 80D -- -- 80D -- -- -- -- -- -- -- 80D -- 90D -- 85D     100
6.3 Brass 200Rh Long ASTM B367   -- 75D -- 85D 75D -- -- 75D -- -- -- -- -- -- -- 80D -- 90D -- 80B     100
6.4 High Strength Bronze 470Rf Short Phosphor Bronze   -- -- -- 90D -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --   --
 7. Aluminum
7.1 Al, MG, Unalloyed 100kg Extra Long EC, 1060 1100 -- -- -- -- -- -- 350D 350D -- -- -- -- -- -- -- 350D -- 400D -- 350D