Taper Length Drill Bit Chart
Taper Length Drills are designed for general purpose drilling where a length longer than Jobber Length is required.
They come in a wide range of sizes, finishes and materials such as High Speed Steel, Cobalt and Carbide Tipped.
Taper length drill bits' flute length and overall length are dependant on the diamater of the drill bit. See the chart below for these specifications.
Fractional Sizes | Decimal Equivalent (Inches) | Flute Length (Inches) | Overall Length (Inches) |
1/64β | 0.0156 | 5/16β | 1-1/2β |
1/32β | 0.0312 | 3/4β | 2β |
3/64β | 0.0469 | 1-1/8β | 2-1/4β |
1/16β | 0.0625 | 1-3/4β | 3β |
5/64β | 0.0781 | 2β | 3-3/4β |
3/32β | 0.0938 | 2-1/4β | 4-1/4β |
7/64β | 0.1094 | 2-1/2β | 4-5/8β |
1/8β | 0.125 | 2-3/4β | 5-1/8β |
9/64β | 0.1406 | 3β | 5-3/8β |
5/32β | 0.1562 | 3β | 5-3/8β |
11/64β | 0.1719 | 3-3/8β | 5-3/4β |
3/16β | 0.1875 | 3-3/8β | 5-3/4β |
13/64β | 0.2031 | 3-5/8β | 6β |
7/32β | 0.2188 | 3-5/8β | 6β |
15/64β | 0.2344 | 3-3/4β | 6-1/8β |
1/4β | 0.25 | 3-3/4β | 6-1/8β |
17/64β | 0.2656 | 3-7/8β | 6-1/4β |
9/32β | 0.2812 | 3-7/8β | 6-1/4β |
19/64β | 0.2969 | 4β | 6-3/8β |
5/16β | 0.3125 | 4β | 6-3/8β |
21/64β | 0.3281 | 4-1/8β | 6-1/2β |
11/32β | 0.3438 | 4-1/8β | 6-1/2β |
23/64β | 0.3594 | 4-1/4β | 6-3/4β |
3/8β | 0.375 | 4-1/4β | 6-3/4β |
25/64β | 0.3906 | 4-3/8β | 7β |
13/32β | 0.4062 | 4-3/8β | 7β |
27/64β | 0.4219 | 4-5/8β | 7-1/4β |
7/16β | 0.4375 | 4-5/8β | 7-1/4β |
29/64β | 0.4531 | 4-3/4β | 7-1/2β |
15/32β | 0.4688 | 4-3/4β | 7-1/2β |
31/64β | 0.4844 | 4-3/4β | 7-3/4β |
1/2β | 0.5 | 4-3/4β | 7-3/4β |
33/64β | 0.5156 | 4-3/4β | 8β |
17/32β | 0.5312 | 4-3/4β | 8β |
35/64β | 0.5469 | 4-7/8β | 8-1/4β |
9/16β | 0.5625 | 4-7/8β | 8-1/4β |
37/64β | 0.5781 | 4-7/8β | 8-3/4β |
19/32β | 0.5938 | 4-7/8β | 8-3/4β |
39/64β | 0.6094 | 4-7/8β | 8-3/4β |
5/8β | 0.625 | 4-7/8β | 8-3/4β |
41/64β | 0.6406 | 5-1/8β | 9β |
21/32β | 0.6562 | 5-3/8β | 9β |
43/64β | 0.6719 | 5-3/8β | 9-1/4β |
11/16β | 0.6875 | 5-3/8β | 9-1/4β |
45/64β | 0.7031 | 5-5/8β | 9-1/2β |
23/32β | 0.7188 | 5-5/8β | 9-1/2β |
47/64β | 0.7344 | 5-7/8β | 9-3/4β |
3/4β | 0.75 | 5-7/8β | 9-3/4β |
49/64β | 0.7656 | 6β | 9-7/8β |
25/32β | 0.7812 | 6β | 9-7/8β |
51/64β | 0.7969 | 6-1/8β | 10β |
13/16β | 0.8125 | 6-1/8β | 10β |
53/64β | 0.8281 | 6-1/8β | 10β |
27/32β | 0.8438 | 6-1/8β | 10β |
55/64β | 0.8594 | 6-1/8β | 10β |
7/8β | 0.875 | 6-1/8β | 10β |
57/64β | 0.8906 | 6-1/8β | 10β |
29/32β | 0.9062 | 6-1/8β | 10β |
59/64β | 0.9219 | 6-1/8β | 10-3/4β |
15/16β | 0.9375 | 6-1/8β | 10-3/4β |
61/64β | 0.9531 | 6-3/8β | 11β |
31/32β | 0.9688 | 6-3/8β | 11β |
63/64β | 0.9844 | 6-3/8β | 11β |
1β | 1 | 6-3/8β | 11β |
1-1/8β | 1.125 | 7-1/8β | 11-3/4β |
1-1/4β | 1.25 | 7-7/8β | 12-1/2β |
1-3/8β | 1.375 | 8-7/8β | 14-1/2β |
1-1/2β | 1.5 | 9-3/8β | 15β |
Wire Sizes | Decimal Equivalent (Inches) | Flute Length (Inches) | Overall Length (Inches) |
1 | 0.228 | 3-3/4β | 6-1/8β |
2 | 0.221 | 3-5/8β | 6β |
3 | 0.213 | 3-5/8β | 6β |
4 | 0.209 | 3-5/8β | 6β |
5 | 0.2055 | 3-5/8β | 6β |
6 | 0.204 | 3-5/8β | 6β |
7 | 0.201 | 3-5/8β | 6β |
8 | 0.199 | 3-5/8β | 6β |
9 | 0.196 | 3-5/8β | 6β |
10 | 0.1935 | 3-5/8β | 6β |
11 | 0.191 | 3-5/8β | 6β |
12 | 0.189 | 3-5/8β | 6β |
13 | 0.185 | 3-3/8β | 5-3/4β |
14 | 0.182 | 3-3/8β | 5-3/4β |
15 | 0.18 | 3-3/8β | 5-3/4β |
16 | 0.177 | 3-3/8β | 5-3/4β |
17 | 0.173 | 3-3/8β | 5-3/4β |
18 | 0.1695 | 3-3/8β | 5-3/4β |
19 | 0.166 | 3-3/8β | 5-3/4β |
20 | 0.161 | 3-3/8β | 5-3/4β |
21 | 0.159 | 3-3/8β | 5-3/4β |
22 | 0.157 | 3-3/8β | 5-3/4β |
23 | 0.154 | 3β | 5-3/8β |
24 | 0.152 | 3β | 5-3/8β |
25 | 0.1495 | 3β | 5-3/8β |
26 | 0.147 | 3β | 5-3/8β |
27 | 0.144 | 3β | 5-3/8β |
28 | 0.1405 | 3β | 5-3/8β |
29 | 0.136 | 3β | 5-3/8β |
30 | 0.1285 | 3β | 5-3/8β |
31 | 0.12 | 2-3/4β | 5-1/8β |
32 | 0.116 | 2-3/4β | 5-1/8β |
33 | 0.113 | 2-3/4β | 5-1/8β |
34 | 0.111 | 2-3/4β | 5-1/8β |
35 | 0.11 | 2-3/4β | 5-1/8β |
36 | 0.1065 | 2-1/2β | 4-5/8β |
37 | 0.104 | 2-1/2β | 4-5/8β |
38 | 0.1015 | 2-1/2β | 4-5/8β |
39 | 0.0995 | 2-1/2β | 4-5/8β |
40 | 0.098 | 2-1/2β | 4-5/8β |
41 | 0.096 | 2-1/2β | 4-5/8β |
42 | 0.0935 | 2-1/4β | 4-1/4β |
43 | 0.089 | 2-1/4β | 4-1/4β |
44 | 0.086 | 2-1/4β | 4-1/4β |
45 | 0.082 | 2-1/4β | 4-1/4β |
46 | 0.081 | 2-1/4β | 4-1/4β |
47 | 0.0785 | 2-1/4β | 4-1/4β |
48 | 0.076 | 2β | 3-3/4β |
49 | 0.073 | 2β | 3-3/4β |
50 | 0.07 | 2β | 3-3/4β |
51 | 0.067 | 2β | 3-3/4β |
52 | 0.0635 | 2β | 3-3/4β |
53 | 0.0595 | 1-3/4β | 3β |
54 | 0.055 | 1-3/4β | 3β |
55 | 0.052 | 1-3/4β | 3β |
56 | 0.0465 | 1-1/8β | 2-1/4β |
57 | 0.043 | 1-1/8β | 2-1/4β |
58 | 0.042 | 1-1/8β | 2-1/4β |
59 | 0.041 | 1-1/8β | 2-1/4β |
60 | 0.04 | 1-1/8β | 2-1/4β |
43 | |||
61 | 0.039 | 1-1/8β | 2-1/4β |
62 | 0.038 | 3/4β | 2β |
63 | 0.037 | 3/4β | 2β |
64 | 0.036 | 3/4β | 2β |
65 | 0.035 | 3/4β | 2β |
66 | 0.033 | 3/4β | 2β |
67 | 0.032 | 3/4β | 2β |
68 | 0.031 | 3/4β | 2β |
69 | 0.0292 | 3/4β | 2β |
70 | 0.028 | 3/4β | 2β |
71 | 0.026 | 3/4β | 2β |
72 | 0.025 | 5/16β | 1-1/2β |
73 | 0.024 | 5/16β | 1-1/2β |
74 | 0.0225 | 5/16β | 1-1/2β |
75 | 0.021 | 5/16β | 1-1/2β |
76 | 0.02 | 5/16β | 1-1/2β |
77 | 0.018 | 5/16β | 1-1/2β |
78 | 0.016 | 5/16β | 1-1/2β |
79 | 0.0145 | 5/16β | 1-1/2β |
80 | 0.0135 | 5/16β | 1-1/2β |