The drill rod threads are tested by special thread gauge, and the thread part is specially strengthened.
The drill rods have consistent concentricity & straghtness, and its precision and mechanical properties reach the international advanced level.
Standard | OD (mm) | ID (mm) | Wall Thickness (mm) | TPI | Pin Thread Length(mm) | Weight (kg/m) |
BC | 55.7 | 46.1 | 4.8 | 3.0 | 44.45 | 6.03 |
NC | 70.5 | 60.3 | 5.1 | 3.0 | 44.45 | 8.08 |
HC | 89.0 | 77.8 | 5.6 | 3.0 | 44.45 | 11.52 |
PC | 114.3 | 101.9 | 6.2 | 2.5 | 63.50 | 16.53 |
SC | 139.7 | 125.5 | 7.1 | 2.5 | 62.80 | 23.22 |