About Drill Bits
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Drill Bit Decimal Size Equivalents
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Carbide Drill Bits for Hardened Steel
Harder, stronger, and more wear resistant than carbide-tipped steel, solid-carbide bits maintain their sharp edges longer. They require rigid toolholding to prevent breakage and should not be used in hand-held drilling applications. The straight flutes withstand the heavy pressure necessary to penetrate hard steel. A four-facet or split point keeps the bit centered without a pilot hole. These bits are short length, also known as screw machine or stub length, which provides maximum rigidity for drilling straighter holes than jobbers'-length drill bits.
Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated drill bits.
For technical drawings and 3-D models, click on a part number.
Shank | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | No. of Flutes | For Max. Hardness | Point Style | Each | |
Uncoated Carbide | ||||||||||
Inch | ||||||||||
Carbide Shank | ||||||||||
1/16" | 0.0625" | 1 1/2" | 0.3" | Round | 1/16" | 2 | Rockwell C45 | Four Facet | 0000000 | 000000 |
5/64" | 0.0781" | 2" | 0.4" | Round | 5/64" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
3/32" | 0.0938" | 2" | 0.4" | Round | 3/32" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
7/64" | 0.1094" | 2 1/4" | 0.5" | Round | 7/64" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
1/8" | 0.125" | 2 1/4" | 0.5" | Round | 1/8" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
9/64" | 0.1406" | 2 1/2" | 0.5" | Round | 9/64" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
5/32" | 0.1563" | 2 1/2" | 0.6" | Round | 5/32" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
11/64" | 0.1719" | 2 1/2" | 0.6" | Round | 11/64" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
3/16" | 0.1875" | 2 1/2" | 0.6" | Round | 3/16" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
13/64" | 0.2031" | 2 1/2" | 0.8" | Round | 13/64" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
7/32" | 0.2188" | 2 1/2" | 0.8" | Round | 7/32" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
15/64" | 0.2344" | 2 1/2" | 0.8" | Round | 15/64" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
1/4" | 0.25" | 2 1/2" | 0.8" | Round | 1/4" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
17/64" | 0.2656" | 2 1/2" | 0.8" | Round | 17/64" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
9/32" | 0.2813" | 2 1/2" | 0.8" | Round | 9/32" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
5/16" | 0.3125" | 2 1/2" | 1" | Round | 5/16" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
3/8" | 0.375" | 3" | 1" | Round | 3/8" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
7/16" | 0.4375" | 3" | 1" | Round | 7/16" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
1/2" | 0.5" | 3" | 1" | Round | 1/2" | 2 | Rockwell C45 | Four Facet | 0000000 | 000000 |
Wire Gauge | ||||||||||
Carbide Shank | ||||||||||
60 ga. | 0.04" | 1 1/2" | 0.3" | Round | 0.04" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
59 ga. | 0.041" | 1 1/2" | 0.3" | Round | 0.041" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
58 ga. | 0.042" | 1 1/2" | 0.3" | Round | 0.042" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
57 ga. | 0.043" | 1 1/2" | 0.3" | Round | 0.043" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
56 ga. | 0.0465" | 1 1/2" | 0.3" | Round | 0.0465" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
55 ga. | 0.052" | 1 1/2" | 0.3" | Round | 0.052" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
54 ga. | 0.055" | 1 1/2" | 0.3" | Round | 0.055" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
53 ga. | 0.0595" | 1 1/2" | 0.3" | Round | 0.0595" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
52 ga. | 0.0635" | 1 1/2" | 0.3" | Round | 0.0635" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
51 ga. | 0.067" | 1 1/2" | 0.3" | Round | 0.067" | 2 | Rockwell C45 | Four Facet | 000000 | 00000 |
50 ga. | 0.07" | 2" | 0.3" | Round | 0.07" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
49 ga. | 0.073" | 2" | 0.3" | Round | 0.073" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
48 ga. | 0.076" | 2" | 0.4" | Round | 0.076" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
47 ga. | 0.0785" | 2" | 0.4" | Round | 0.0785" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
46 ga. | 0.081" | 2" | 0.4" | Round | 0.081" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
45 ga. | 0.082" | 2" | 0.4" | Round | 0.082" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
44 ga. | 0.086" | 2" | 0.4" | Round | 0.086" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
43 ga. | 0.089" | 2" | 0.4" | Round | 0.089" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
42 ga. | 0.0935" | 2" | 0.4" | Round | 0.0935" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
41 ga. | 0.096" | 2" | 0.4" | Round | 0.096" | 2 | Rockwell C45 | Four Facet | 000000 | 00000 |
40 ga. | 0.098" | 2" | 0.4" | Round | 0.098" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
39 ga. | 0.0995" | 2 1/4" | 0.5" | Round | 0.0995" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
38 ga. | 0.1015" | 2 1/4" | 0.5" | Round | 0.1015" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
37 ga. | 0.104" | 2 1/4" | 0.5" | Round | 0.104" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
36 ga. | 0.1065" | 2 1/4" | 0.5" | Round | 0.1065" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
35 ga. | 0.11" | 2 1/4" | 0.5" | Round | 0.11" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
34 ga. | 0.111" | 2 1/4" | 0.5" | Round | 0.111" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
33 ga. | 0.113" | 2 1/4" | 0.5" | Round | 0.113" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
32 ga. | 0.116" | 2 1/4" | 0.5" | Round | 0.116" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
31 ga. | 0.12" | 2 1/4" | 0.5" | Round | 0.12" | 2 | Rockwell C45 | Four Facet | 000000 | 00000 |
30 ga. | 0.1285" | 2 1/4" | 0.5" | Round | 0.1285" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
29 ga. | 0.136" | 2 1/2" | 0.5" | Round | 0.136" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
28 ga. | 0.1405" | 2 1/2" | 0.5" | Round | 0.1405" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
27 ga. | 0.144" | 2 1/2" | 0.5" | Round | 0.144" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
26 ga. | 0.147" | 2 1/2" | 0.5" | Round | 0.147" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
25 ga. | 0.1495" | 2 1/2" | 0.5" | Round | 0.1495" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
24 ga. | 0.152" | 2 1/2" | 0.5" | Round | 0.152" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
23 ga. | 0.154" | 2 1/2" | 0.5" | Round | 0.154" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
22 ga. | 0.157" | 2 1/2" | 0.6" | Round | 0.157" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
21 ga. | 0.159" | 2 1/2" | 0.6" | Round | 0.159" | 2 | Rockwell C45 | Four Facet | 000000 | 00000 |
20 ga. | 0.161" | 2 1/2" | 0.6" | Round | 0.161" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
19 ga. | 0.166" | 2 1/2" | 0.6" | Round | 0.166" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
18 ga. | 0.1695" | 2 1/2" | 0.6" | Round | 0.1695" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
17 ga. | 0.173" | 2 1/2" | 0.6" | Round | 0.173" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
16 ga. | 0.177" | 2 1/2" | 0.6" | Round | 0.177" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
15 ga. | 0.18" | 2 1/2" | 0.6" | Round | 0.18" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
14 ga. | 0.182" | 2 1/2" | 0.6" | Round | 0.182" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
13 ga. | 0.185" | 2 1/2" | 0.6" | Round | 0.185" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
12 ga. | 0.189" | 2 1/2" | 0.6" | Round | 0.189" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
11 ga. | 0.191" | 2 1/2" | 0.6" | Round | 0.191" | 2 | Rockwell C45 | Four Facet | 000000 | 00000 |
10 ga. | 0.1935" | 2 1/2" | 0.6" | Round | 0.1935" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
9 ga. | 0.196" | 2 1/2" | 0.8" | Round | 0.196" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
8 ga. | 0.199" | 2 1/2" | 0.8" | Round | 0.199" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
7 ga. | 0.201" | 2 1/2" | 0.8" | Round | 0.201" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
6 ga. | 0.204" | 2 1/2" | 0.8" | Round | 0.204" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
5 ga. | 0.2055" | 2 1/2" | 0.8" | Round | 0.2055" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
4 ga. | 0.209" | 2 1/2" | 0.8" | Round | 0.209" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
3 ga. | 0.213" | 2 1/2" | 0.8" | Round | 0.213" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
2 ga. | 0.221" | 2 1/2" | 0.8" | Round | 0.221" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
1 ga. | 0.228" | 2 1/2" | 0.8" | Round | 0.228" | 2 | Rockwell C45 | Four Facet | 000000 | 00000 |
Letter | ||||||||||
Carbide Shank | ||||||||||
A | 0.234" | 2 1/2" | 0.8" | Round | 0.234" | 2 | Rockwell C45 | Four Facet | 00000000 | 00000 |
B | 0.238" | 2 1/2" | 0.8" | Round | 0.238" | 2 | Rockwell C45 | Four Facet | 00000000 | 00000 |