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These professional-quality, diamond, drill bits are designed for use in drilling asphalt and concrete. They have a total segment height of .320″ (8.128mm), a diamond depth of .250″ (6.350mm) and a segment base of .070 (1.778mm). The standard bit length is 13″ (330.200mm) and the integral thread adapter is 1.25″ – 7 thread.
Be advised that core drill bits have .125″ walls and produce a core 0.25″ smaller than the OD of the drill bit!
Concrete drill bits are for critically hard concrete with heavy, steel reinforcement.
Asphalt drill bits are for asphalt and concrete with soft, abrasive aggregate.
| Size | For Asphalt |
For Concrete |
|
|---|---|---|---|
| In. | mm | ||
| 1 | 25 | HR-2550.1 | HR-2530.1 |
| 1.125 | 29 | HR-2550.1125 | HR-2530.1125 |
| 1.25 | 32 | HR-2550.125 | HR-2530.125 |
| 1.5 | 38 | HR-2550.15 | HR-2530.15 |
| 1.75 | 44 | HR-2550.175 | HR-2530.175 |
| 1.875 | 63 | HR-2550.1875 | HR-2530.1875 |
| 2 | 51 | HR-2550.2 | HR-2530.2 |
| 2.25 | 57 | HR-2550.225 | HR-2530.225 |
| 2.5 | 63 | HR-2550.25 | HR-2530.25 |
| 2.75 | 70 | HR-2550.275 | HR-2530.275 |
| 3 | 76 | HR-2550.3 | HR-2530.3 |
| 3.5 | 89 | HR-2550.35 | HR-2530.35 |
| 4 | 100 | HR-2550.4 | HR-2530.4 |
| 4.25 | 108 | HR-2550.425 | HR-2530.425 |
| 4.5 | 114 | HR-2550.45 | HR-2530.45 |
| 5 | 127 | HR-2550.5 | HR-2530.5 |
| 5.5 | 140 | HR-2550.55 | HR-2530.55 |
| 6 | 152 | HR-2550.6 | HR-2530.6 |
| 6.25 | 159 | HR-2550.625 | HR-2530.625 |
| 7 | 178 | HR-2550.7 | HR-2530.7 |
| 8 | 203 | HR-2550.8 | HR-2530.8 |
| 9 | 230 | HR-2550.9 | HR-2530.9 |
| 10 | 254 | HR-2550.10 | HR-2530.10 |
| 11 | 280 | HR-2550.11 | HR-2530.11 |
| 12 | 305 | HR-2550.12 | HR-2530.12 |
| 13 | 330 | HR-2550.13 | HR-2530.13 |
| 14 | 350 | HR-2550.14 | HR-2530.14 |
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