Description
Supplied either as steel tooth bits or as tungsten carbide insert bits to suit various rock types. Regular fluid circulation, jet or air-blast types are available. Large diameter refurbished rock bits may also available at reduced prices.
| Rock bit size and connection type |
| Diameter
Inches |
API Reg.
Pin Size |
Diameter
Inches |
API Reg.
Pin Size |
| 27/8 ʺ | N rod | 63/4 – 67/8 ʺ | 31/2 ʺ |
| 27/8 – 3 ʺ | N rod | 73/8 ʺ | 31/2 ʺ |
| 31/8 – 31/4 ʺ | N rod | 75/8 ʺ | 41/2 ʺ |
| 31/2 – 35/8 ʺ | 23/8 ʺ | 77/8 – 8 ʺ | 41/2 ʺ |
| 33/4 ʺ | 23/8 ʺ | 81/2 – 85/8 ʺ | 41/2 ʺ |
| 37/8 – 4 ʺ | 23/8 ʺ | 83/4 ʺ | 41/2 ʺ |
| 41/4 – 43/8 ʺ | 23/8 ʺ | 9 ʺ | 41/2 ʺ |
| 41/2 – 45/8 ʺ | 23/8 ʺ | 95/8 ʺ | 65/8 ʺ |
| 43/4 – 47/8 ʺ | 27/8 ʺ | 97/8 ʺ | 65/8 ʺ |
| 5ʺ | 27/8 ʺ | 105/8 ʺ | 65/8 ʺ |
| 51/8 – 51/4 ʺ | 27/8 ʺ | 11 ʺ | 65/8 ʺ |
| 51/2 ʺ | 31/2“ | 121/4 “ | 65/8 ʺ |
| 55/8 – 53/4 ʺ | 31/2“ | 133/4 ʺ | 65/8 ʺ |
| 57/8 ʺ | 31/2“ | 143/4 ʺ | 65/8 ʺ |
| 6 – 61/8ʺ | 31/2“ | 16″ | 65/8 ʺ |
| 61/4 ʺ | 31/2“ | 171/2 ʺ | 65/8 ʺ |