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