B46 Impregnated Diamond Core Bit
| Size | B46 | Design | Metric |
| Outer diameter MAX (mm) | 46.18 | Outer diameter MAX (in) | 1.818 |
| Outer diameter MIN (mm) | 45.92 | Outer diameter MIN (in) | 1.808 |
| Inner diameter MAX (mm) | 31.82 | Inner diameter MAX (in) | 1.253 |
| Inner diameter MIN (mm) | 31.57 | Inner diameter MIN (in) | 1.243 |
| Hole diameter (mm) | 46.5 | Hole diameter (in) | 1.82 |
| Core diameter (mm) | 37.1 | Core diameter (in) | 1.25 |
| Hole area (cm2) | 16.8 | Hole area (in2) | 2.6 |
| Core area (cm2) | 7.9 | Core area (in2) | 1.22 |
