DTH Drill Bits Suppliers In South Africa
What are ‘Down-the-Hole’ (DTH) Drill Bits and how are they used? Down-the-hole drill bits are used with down-the-hole hammers for drilling holes through a wide range of rock types. Our drill bits are designed with a splined drive for rotating the bit in the ground.
DTH Drill Bits Suppliers In South Africa
DTH Hammer with Foot Valve type is the most popular type of High Air Pressure DTH Hammer. It is widely used in well drilling, pile foundations, and engineering projects. GMD has rich experience in manufacturing High-Quality DTH Hammer without Foot valves.
High Air Pressure DTH Hammer Available For the Bit Without Foot Valve
It has the following characteristics:
1, Out of the trouble of foot valve fracture and expansion and contraction.
2, Lower energy consumption and higher impact frequency.
The drilling speed is 15-30 higher than the one with the foot valve
3, Simple structure, reliable parts, long life, easy and cheap maintenance.
4, Lower air and oil consumption. The oil consumption is about 10% lower than the one with foot valve.
| High Air Pressure DTH Hammer (without foot valve) Technical Data | ||||||
| DHD/COP series DTH HAMMERS | ||||||
| DTH hammer type | DHD35 | DHD340 | DHD350 | DHD360 | DHD380 | DHD1120 |
| Bit shank | IR3.5 | COP44 DHD340 | COP54 DHD350R | COP64 DHD360 | COP84 DHD380 | DHD1120 |
| Hole range(mm) | Φ90-115 | Φ110-135 | Φ135-155 | Φ155-203 | Φ195-254 | Φ305-445 |
| Connection thread | API 2 3/8” Reg. | API 2 3/8″Reg | API 2 3/8″Reg | API 3 1/2″Reg | API 4 1/2″Reg | API 6 5/8″Reg |
| API 3 1/2″Reg | ||||||
| Working pressure | 1.0-1.5Mpa | 1.0-2.5Mpa | 1.0-2.5Mpa | 1.0-2.5Mpa | 1.0-2.5Mpa | 1.0-2.5Mpa |
| QL series DTH HAMMER | ||||||
| DTH hammer type | QL40 | QL50 | QL60 | QL80 | ||
| Bit shank | QL40 | QL50 | QL60 | QL80 | ||
| Hole range(mm) | Φ110-135 | Φ135-155 | Φ155-203 | Φ195-254 | ||
| Connection thread | API 2 3/8″Reg | API 2 3/8″Reg | API 3 1/2″Reg | API 4 1/2″Reg | ||
| API 3 1/2″Reg | ||||||
| Working pressure | 1.0-2.5Mpa | 1.0-2.5Mpa | 1.0-2.5Mpa | 1.0-2.5Mpa | ||
| SD series DTH HAMMER | ||||||
| DTH hammer type | SD4 | SD5 | SD6 | SD8 | SD10 | SD12 |
| Bit shank | SD4 | SD5 | SD6 | SD8 | SD10 | SD12 |
| Hole range(mm) | Φ110-135 | Φ135-155 | Φ155-203 | Φ195-254 | Φ254-311 | Φ305-445 |
| Connection thread | API 2 3/8″Reg | API 2 3/8″Reg | API 3 1/2″Reg | API 4 1/2″Reg | API 6 5/8″Reg | API 6 5/8″Reg |
| API 3 1/2″Reg | ||||||
| Working pressure | 1.5-2.0Mpa | 1.0-2.5Mpa | 1.0-2.5Mpa | 1.0-2.5Mpa | 1.0-2.5Mpa | 1.0-2.5Mpa |
| MISSION series DTH HAMMER | ||||||
| DTH hammer type | MISSION4 | MISSION5 | MISSION6 | MISSION8 | ||
| Bit shank | MISSION4 | MISSION5 | MISSION6 | MISSION8 | ||
| Hole range(mm) | Φ110-135 | Φ155-190 | Φ155-203 | Φ195-254 | ||
| Connection thread | API 2 3/8″Reg | API 2 3/8″Reg | API 2 7/8″Reg | API 4 1/2″Reg | ||
| API 3 1/2″Reg | API 3 1/2″Reg | |||||
| API 2 7/8″Reg | 2 7/8″IF | |||||
| Working pressure | 1.2-2.0Mpa | 1.3-2.3Mpa | 1.5-2.5Mpa | 1.5-3.0Mpa | ||
| NUMA series DTH HAMMER | ||||||
| DTH hammer type | NUMA100 | NUMA120 | NUMA125 | |||
| Bit shank | NUMA100 | NUMA120 | NUMA125 | |||
| Hole range(mm) | Φ254-311 | Φ305-445 | Φ305-445 | |||
| Connection thread | API 6 5/8″Reg | API 6 5/8″Reg | API 6 5/8″Reg | |||
| Working pressure | 1.0-2.5Mpa | 1.0-2.5Mpa | 1.0-2.5Mpa | |||