Straight shank countersink drill bit specification table 180 degrees Specification Small Diameter Large Diameter Overall Length Small Diameter Blade Length Shank Diameter M3 3.4 6.5 65 13 6.5 M4 4.5 8.0 75 18 8 M5 5.5 9.5 85 22 9.5 M6 6.6 11.0 90 25 11 M8 9.0 14.0 100 28 12 M10 11.0 17.5 […]
| 180 degrees | |||||
| Specification | Small Diameter | Large Diameter | Overall Length | Small Diameter Blade Length | Shank Diameter |
| M3 | 3.4 | 6.5 | 65 | 13 | 6.5 |
| M4 | 4.5 | 8.0 | 75 | 18 | 8 |
| M5 | 5.5 | 9.5 | 85 | 22 | 9.5 |
| M6 | 6.6 | 11.0 | 90 | 25 | 11 |
| M8 | 9.0 | 14.0 | 100 | 28 | 12 |
| M10 | 11.0 | 17.5 | 110 | 30 | 12 |
| M12 | 14.0 | 20.0 | 115 | 32 | 12 |
| 1/4 | 6.85 | 11.0 | 90 | 25 | 11 |
| 5/16 | 8.55 | 14.0 | 100 | 28 | 12 |
| 3/8 | 10.1 | 15.0 | 110 | 30 | 12 |
| 1/2 | 13.5 | 20.0 | 115 | 32 | 12 |
| 90 degrees | |||||
| Specification | Small Diameter | Large Diameter | Overall Length | Small Diameter Blade Length | Shank Diameter |
| M3 | 3.4 | 6.4 | 65 | 35 | 6.4 |
| M4 | 4.5 | 8.4 | 75 | 42 | 8.4 |
| M5 | 5.5 | 10.4 | 85 | 50 | 10.4 |
| M6 | 6.6 | 12.5 | 90 | 53 | 12.0 |
| M8 | 9.0 | 16.5 | 100 | 53 | 12.0 |
| Blade diameter (d) | Blade diameter tolerance | Blade length (L2) | Shank diameter (D) | Overall length (L) |
| 0.4 | 0.05 -0.05 | 0.5 | 3.0 | 31 |
| 0.5 | 0.05 -0.05 | 0.6 | 3.0 | 31 |
| 0.6 | 0.05 -0.05 | 0.7 | 3.5 | 36 |
| 0.7 | 0.05 -0.05 | 0.8 | 3.5 | 36 |
| 0.8 | 0.05 -0.05 | 0.9 | 4.0 | 36 |
| 0.9 | 0.05 -0.05 | 1.0 | 4.0 | 36 |
| 1.0 | 0.05 -0.05 | 1.2 | 4.0 | 36 |
| 1.2 | 4.0 | 100 | ||
| 1.2 | 0.05 -0.05 | 1.4 | 5.0 | 42 |
| 1.5 | 0.05 -0.05 | 1.8 | 5.0 | 42 |
| 1.8 | 5.0 | 100 | ||
| 1.8 | 5.0 | 150 | ||
| 1.8 | 5.0 | 200 | ||
| 2.0 | 0.08 -0.08 | 2.4 | 5.0 | 42 |
| 2.4 | 6.0 | 100 | ||
| 2.4 | 6.0 | 150 | ||
| 2.4 | 6.0 | 200 | ||
| 2.5 | 0.08 -0.08 | 3.0 | 6.0 | 47 |
| 3.0 | 8.0 | 100 | ||
| 3.0 | 8.0 | 150 | ||
| 3.0 | 8.0 | 200 | ||
| 3.0 | 0.08 -0.08 | 3.6 | 7.7 | 57 |
| 3.6 | 10.0 | 100 | ||
| 3.6 | 10.0 | 150 | ||
| 3.6 | 10.0 | 200 | ||
| 3.2 | 0.08 -0.08 | 3.8 | 7.7 | 57 |
| 4.0 | 0.08 -0.08 | 4.8 | 10.0 | 69 |
| 4.8 | 10.0 | 100 | ||
| 4.8 | 10.0 | 150 | ||
| 4.8 | 10.0 | 200 | ||
| 5.0 | 0.12 -0.12 | 6.0 | 11.0 | 69 |
| 6.0 | 12.0 | 100 | ||
| 6.0 | 12.0 | 150 | ||
| 6.0 | 12.0 | 200 | ||
| 6.0 | 0.12 -0.12 | 8.0 | 16.0 | 90 |
| 8.0 | 0.12 -0.12 | 10.0 | 18.0 | 100 |
| 10.0 | 0.12 -0.12 | 12.0 | 18.0 | 100 |
| 12.0 | 0.12 -0.12 | 15.0 | 22.0 | 110 |
| Code | inch | mm |
| #1 | 0.228 | 5.79 |
| #2 | 0.221 | 5.61 |
| #3 | 0.213 | 5.41 |
| #4 | 0.209 | 5.31 |
| #5 | 0.2055 | 5.22 |
| #6 | 0.204 | 5.18 |
| #7 | 0.201 | 5.11 |
| #8 | 0.199 | 5.05 |
| #9 | 0.196 | 4.98 |
| #10 | 0.1935 | 4.91 |
| #11 | 0.191 | 4.85 |
| #12 | 0.189 | 4.80 |
| #13 | 0.185 | 4.70 |
| #14 | 0.182 | 4.62 |
| #15 | 0.18 | 4.57 |
| #16 | 0.177 | 4.50 |
| #17 | 0.173 | 4.39 |
| #18 | 0.1695 | 4.31 |
| #19 | 0.166 | 4.22 |
| #20 | 0.161 | 4.09 |
| #21 | 0.159 | 4.04 |
| #22 | 0.157 | 3.99 |
| #23 | 0.154 | 3.91 |
| #24 | 0.152 | 3.86 |
| #25 | 0.1495 | 3.80 |
| #26 | 0.147 | 3.73 |
| #27 | 0.144 | 3.66 |
| #28 | 0.1405 | 3.57 |
| #29 | 0.136 | 3.45 |
| #30 | 0.1285 | 3.26 |
| #31 | 0.12 | 3.05 |
| #32 | 0.116 | 2.95 |
| #33 | 0.113 | 2.87 |
| #34 | 0.111 | 2.82 |
| #35 | 0.11 | 2.79 |
| #36 | 0.1065 | 2.71 |
| #37 | 0.104 | 2.64 |
| #38 | 0.1015 | 2.58 |
| #39 | 0.0995 | 2.53 |
| #40 | 0.098 | 2.49 |
| #41 | 0.096 | 2.44 |
| #42 | 0.0935 | 2.37 |
| #43 | 0.089 | 2.26 |
| #44 | 0.086 | 2.18 |
| #45 | 0.082 | 2.08 |
| #46 | 0.081 | 2.06 |
| #47 | 0.0785 | 1.99 |
| #48 | 0.076 | 1.93 |
| #49 | 0.073 | 1.85 |
| #50 | 0.07 | 1.78 |
| #51 | 0.067 | 1.70 |
| #52 | 0.0635 | 1.61 |
| #53 | 0.0595 | 1.51 |
| #54 | 0.055 | 1.40 |
| #55 | 0.052 | 1.32 |
| #56 | 0.0465 | 1.18 |
| #57 | 0.043 | 1.09 |
| #58 | 0.042 | 1.07 |
| #59 | 0.041 | 1.04 |
| #60 | 0.04 | 1.02 |
| Code | inch | mm |
| #A | 0.234 | 5.94 |
| #B | 0.238 | 6.05 |
| #C | 0.242 | 6.15 |
| #D | 0.246 | 6.25 |
| #E | 0.25 | 6.35 |
| #F | 0.257 | 6.53 |
| #G | 0.261 | 6.63 |
| #H | 0.266 | 6.76 |
| #I | 0.272 | 6.91 |
| #J | 0.277 | 7.04 |
| #K | 0.281 | 7.14 |
| #L | 0.29 | 7.37 |
| #M | 0.295 | 7.49 |
| #N | 0.302 | 7.67 |
| #O | 0.316 | 8.03 |
| #P | 0.326 | 8.28 |
| #Q | 0.332 | 8.43 |
| #R | 0.339 | 8.61 |
| #S | 0.348 | 8.84 |
| #T | 0.358 | 9.09 |
| #U | 0.368 | 9.35 |
| #V | 0.377 | 9.58 |
| #W | 0.386 | 9.80 |
| #X | 0.397 | 10.08 |
| #Y | 0.404 | 10.26 |
| #Z | 0.413 | 10.49 |
| Code | inch | mm |
| 1/16. | 0.0625 | 1.59 |
| 5/64. | 0.0781 | 1.98 |
| 3/32. | 0.0938 | 2.38 |
| 7/64. | 0.1094 | 2.78 |
| 1/8. | 0.125 | 3.18 |
| 9/64. | 0.1406 | 3.57 |
| 5/32. | 0.1563 | 3.97 |
| 11/64. | 0.1719 | 4.37 |
| 3/16. | 0.1875 | 4.76 |
| 13/64. | 0.2031 | 5.16 |
| 7/32. | 0.2188 | 5.56 |
| 15/64. | 0.2344 | 5.95 |
| 1/4. | 0.25 | 6.35 |
| 17/64. | 0.2656 | 6.75 |
| 9/32. | 0.2812 | 7.14 |
| 19/64. | 0.2969 | 7.54 |
| 5/16. | 0.3125 | 7.94 |
| 21/64 | 0.3281 | 8.33 |
| 11/32. | 0.3438 | 8.73 |
| 23/64. | 0.3594 | 9.13 |
| 3/8. | 0.375 | 9.53 |
| 25/64. | 0.3906 | 9.92 |
| 13/32. | 0.4063 | 10.32 |
| 27/64. | 0.4219 | 10.72 |
| 7/16. | 0.4375 | 11.11 |
| 29/64. | 0.4531 | 11.51 |
| 15/32. | 0.4688 | 11.91 |
| 31/64. | 0.4844 | 12.3 |
| 1/2. | 0.5 | 12.7 |
As the founder of MachineMFG, I have dedicated over a decade of my career to the metalworking industry. My extensive experience has allowed me to become an expert in the fields of sheet metal fabrication, machining, mechanical engineering, and machine tools for metals. I am constantly thinking, reading, and writing about these subjects, constantly striving to stay at the forefront of my field. Let my knowledge and expertise be an asset to your business.
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