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ANSI B94.11M  straight shank twist drills  

 

 
Manufacturing process: rolled, milled or fully ground

Material: HSS (HSS-E are available)
Point angle: 118<or 135º split point Flute type: N
Finish: black oxide, bright, polished, or Ti-coated 
Diameter: 1/64--11/16inch, 3/64-23/32inch, A-Z

JOBBER

Diameter L2 L1 Diameter L2 L1 Diameter L2 L1
Inch No./Ltr Dec. Equiv.  Inch No./Ltr Dec. Equiv.  Inch No./Ltr Dec. Equiv. 
- 90 0.221 2 19 - - 1.35 22 48 - 30 3.264 41 70
- 89 0.231 2 19 - 54 1.397 22 48 - - 3.3 44 73
- 88 0.241 2 19 - - 1.4 22 48 - - 3.4 44 73
- 87 0.254 2 19 - - 1.45 22 48 - 29 3.454 44 73
- 86 0.267 2.5 19 - - 1.5 22 48 - - 3.5 44 73
- 85 0.28 2.5 19 - 53 1.511 22 48 - 28 3.569 44 73
- 84 0.292 2.5 19 - - 1.55 22 48 9/64 - 3.571 44 73
- 83 0.305 2.5 19 1/16" - 1.588 22 48 - - 3.6 48 76
- 82 0.318 2.5 19 - 52 1.6 22 48 - 27 3.658 48 76
- 81 0.33 2.5 19 - - 1.613 22 48 - - 3.7 48 76
- 80 0.343 3 19 - - 1.65 25 51 - 26 3.734 48 76
- 79 0.368 3 19 - - 1.7 25 51 - 25 3.797 48 76
1/64 - 0.396 5 19 - 51 1.702 25 51 - - 3.8 48 76
- - 0.4 5 19 - - 1.75 25 51 - 24 3.861 51 79
- 78 0.406 5 22 - - 1.778 25 51 - - 3.9 51 79
- - 0.42 5 22 - - 1.8 25 51 - 23 3.912 51 79
- - 0.45 5 22 - - 1.85 25 51 5/32 - 3.967 51 79
- 77 0.457 5 22 - 49 1.859 25 51 - 22 3.988 51 79
- - 0.48 5 22 - - 1.9 25 51 - - 4 54 83
- - 0.505 5 22 - 48 1.93 25 51 - 21 4.039 54 83
- 76 0.508 5 22 - - 1.95 25 51 - 20 4.089 54 83
- 75 0.533 6 25 5/64 - 1.984 25 51 - - 4.1 54 83
- - 0.55 6 25 - 47 1.994 25 51 - - 4.2 54 83
- 74 0.572 6 25 - - 2 25 51 - 19 4.216 54 83
- - 0.6 8 29 - - 2.05 29 54 - - 4.3 54 83
- 73 0.61 8 29 - 46 2.057 29 54 - 18 4.305 54 83
- 72 0.635 8 29 - 45 2.083 29 54 11/64 - 4.366 54 83
- - 0.65 10 32 - - 2.1 29 54 - 17 4.394 56 86
- 71 0.66 10 32 - - 2.15 29 54 - - 4.4 56 86
- - 0.7 10 32 - 44 2.184 29 54 - 16 4.496 56 86
- 70 0.711 10 32 - - 2.2 32 57 - - 4.5 56 86
- 69 0.742 13 35 - - 2.25 32 57 - 15 4.572 56 86
- - 0.75 13 35 - 43 2.261 32 57 - - 4.6 56 86
- 68 0.787 13 35 - - 2.3 32 57 - 14 4.632 56 86
1/32 - 0.792 13 35 - - 2.35 32 57 - 13 4.7 59 89
- - 0.8 13 35 - 42 2.375 32 57 3/16" - 4.762 59 89
- 67 0.813 13 35 3/32 - 2.383 32 57 - 12 4.8 59 89
- 66 0.838 13 35 - - 2.4 35 60 - 11 4.851 59 89
- - 0.85 16 38 - 41 2.438 35 60 - - 4.9 62 92
- 65 0.889 16 38 - - 2.45 35 60 - 10 4.915 62 92
- - 0.889 16 38 - 40 2.489 35 60 - 9 4.978 62 92
- 64 0.914 16 38 - - 2.5 35 60 - - 5 62 92
- 63 0.94 16 38 - 39 2.527 35 60 - 8 5.045 62 92
- - 0.95 16 38 - 38 2.578 37 64 - - 5.1 62 92
- 62 0.965 16 38 - - 2.6 37 64 - 7 5.105 62 92
- 61 0.991 17 41 - 37 2.642 37 64 13/64 - 5.159 62 92
- - 1 17 41 - - 2.7 37 64 - 6 5.182 64 95
- 60 1.016 17 41 - 36 2.705 37 64 - - 5.2 64 95
- 59 1.041 17 41 7/64 - 2.779 38 67 - 5 5.22 64 95
- - 1.05 17 41 - 35 2.794 38 67 - - 5.3 64 95
- 58 1.067 17 41 - - 2.8 38 67 - 4 5.309 64 95
- 57 1.092 19 44 - 34 2.819 38 67 - - 5.4 64 95
- - 1.1 19 44 - 33 2.87 38 67 - 3 5.41 64 95
- - 1.15 19 44 - - 2.9 41 70 - - 5.5 64 95
- 56 1.181 19 44 - 32 2.946 41 70 7/32 - 5.558 64 95
3/64 - 1.191 19 44 - - 3 41 70 - - 5.6 67 98
- - 1.2 22 48 - 31 3.048 41 70 - 2 5.613 67 98
- - 1.25 22 48 - - 3.1 41 70 - - 5.7 67 98
- 55 1.3 22 48  1/8 - 3.175 41 70 - 1 5.791 67 98
- - 1.321 22 48 - - 3.2 41 70          

FRACTIONAL

D L2 L1 D L2 L1
3/64" 1/2" 1-3/8"  25/64" 1-7/8" 3-1/4"
1/16" 5/8" 1-5/8"  13/32" 1-15/16" 3-5/16"
5/64" 11/16" 1-11/16"  27/64" 2" 3-3/8"
3/32" 3/4" 1-3/4"  7/16" 2-1/16" 3-7/16"
7/64" 13/16" 1-13/16"  29/64" 2-1/8" 3-9/16"
1/8" 7/8" 1-7/8"  15/32" 2-1/8" 3-5/8"
9/64" 15/16" 1-15/16"  31/64" 2-3/16"  3-11/16"
5/32" 1" 2-1/16"  1/2" 2-1/4"  3-3/4"
11/64" 1-1/16" 2-1/8" 33/64" 2-3/8" 3-7/8"
3/16" 1-1/8" 2-3/16" 17/32" 2-3/8" 3-7/8"
13/64" 1-3/16" 2-1/4" 35/64" 2-1/2" 4"
7/32" 1-1/4" 2-3/8" 9/16" 2-1/2" 4"
15/64" 1-5/16" 2-7/16" 37/64" 2-5/8" 4-1/8"
1/4" 1-3/8" 2-1/2" 19/32" 2-5/8" 4-1/8"
17/64" 1-7/16" 2-5/8" 39/64" 2-3/4" 4-1/4"
9/32" 1-1/2" 2-11/16" 5/8" 2-3/4" 4-1/4"
 19/64" 1-9/16" 2-3/4" 41/64" 2-7/8" 4-1/2"
 5/16" 1-5/8" 2-13/16" 21/32" 2-7/8" 4-1/2"
 21/64" 1-11/16" 2-15/16" 43/64" 2-7/8" 4-5/8"
 11/32" 1-11/16" 3" 11/16" 2-7/8" 4-5/8"
 23/64" 1-3/4" 3-1/16" 46/64" 3" 4-3/4"
 3/8" 1-13/16" 3-1/8" 23/32" 3" 4-3/4"

LETTER

D Dec. Equiv. L1 L2 D Dec. Equiv. L1 L2
A 0.234 3-7/8" 37384 N 0.302 4-3/8" 3-1/16"
B 0.238 4" 2-3/8" O 0.316 4-1/2" 3-1/16"
C 0.242 4" 2-3/4" P 0.323 4-5/8" 3-5/16"
D 0.246 4" 2-3/4" Q 0.332 4-3/4" 3-7/16"
E 0.25 4" 2-3/4" R 0.339 4-3/4" 3-7/16"
F 0.257 4-1/8" 2-7/8" S 0.348 4-7/8" 3-1/2"
G 0.261 4-1/8" 2-7/8" T 0.358 4-7/8" 3-1/2"
H 0.266 4-1/8" 2-7/8" U 0.368 5" 3-5/8"
I 0.272 4-1/8" 2-7/8" V 0.377 5" 3-5/8"
J 0.277 4-1/8" 2-7/8" W 0.386 5-1/8" 3-3/4"
K 0.281 4-1/4" 2-15/16" X 0.397 5-1/8" 3-3/4"
L 0.29 4-1/4" 2-15/16" Y 0.404 5-1/4" 3-7/8"
M 0.295 4-3/8" 3-1/16" Z 0.413 5-1/4" 3-7/8"

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