SD series DTH hammer
SD series of high pressure wind tunnel DTH hammer without nylon tube
Model：SD4/SD5/SD6/SD8/SD10/SD12
Zhuzhou Changhong Mining Machinery Co.,Ltd. Manufacture high pressure pneumatic down hole impactor products which are widely used in metallurgical mines, address drilling, foundation piles, tunnel boring, rock blasting and other industries.
It is a kind of high air pressure DTH hammer without foot valve,and it is our newest design.It is also one of the most advanced DTH hammers in the world.
The advantage of our SD series DTH hammer:
1.Out of the trouble of foot valve fracture expansion and contraction.
2.Lower energy consumption and higher impact frequency.The drilling speed is 15%-30% higher than the one with foot valve.
3.Simple structure,reliable parts,long life span,easy and cheap maintenance.
4. The components are few, the structure is simple, and all the parts are hardened. Therefore, the working life is long, the failure is few, and the maintenance is convenient.
Specifications of SD series DTH hammer:
SD4 DTH hammer
| Parts | Weight | Part No. | Parts | Weight | Part No. |
| 1.Tub Sub | 8.8 KG | SD4-1 | 7.inner Cylinder | 2.45 KG | SD4-7 |
| 2.“O”Ring | 0.01 KG | SD4-2 | 8.Piston | 9 KG | SD4-8 |
| 3.Check Valve | 0.46 KG | SD4-3 | 9.External Cylinder | 15.6 KG | SD4-9 |
| 4.Spring | 0.04 KG | SD4-4 | 10.Retainer Ring | 0.2 KG | SD4-10 |
| 5.Rubber Buffer | 0.2 KG | SD4-5 | 11.“O”Ring | 0.01 KG | SD4-11 |
| 6.Valve Seat | 2.1 KG | SD4-6 | 12.Driver Chuck | 4 KG | SD4-12 |
| 13.Drill Bit | SD4-13 | ||||
| Specification of SD4 DTH hammer | |||||
| Length (Less bit) |
Weight | Outer diameter | Connection Thread | Bit Shank | Hole Range |
| 1082mm | 43KG | φ99mm | API 2 3/8" REG | SD4 | φ110-135mm |
| Work Pressure | Recommended rotation speed | Air Consumption | |||
| 1.0Mpa | 1.8Mpa | ||||
| 1.0-2.2 Mpa | 30-60 r/min | 5.5m3/min | 10m3/min | ||
SD5 DTH hammer
| Parts | Weight | Part No. | Parts | Weight | Part No. |
| 1.Tub Sub | 14.7 KG | SD5-1 | 7.inner Cylinder | 4.4 KG | SD5-7 |
| 2.“O”Ring | 0.02 KG | SD5-2 | 8.Piston | 17.3 KG | SD5-8 |
| 3.Check Valve | 1 KG | SD5-3 | 9.External Cylinder | 23.5 KG | SD5-9 |
| 4.Spring | 0.06 KG | SD5-4 | 10.Retainer Ring | 0.5 KG | SD5-10 |
| 5.Rubber Buffer | 0.2 KG | SD5-5 | 11.“O”Ring | 0.01 KG | SD5-11 |
| 6.Valve Seat | 4.1 KG | SD5-6 | 12.Driver Chuck | 7.8 KG | SD5-12 |
| 13.Drill Bit | SD5-13 | ||||
| Specification of SD5 DTH hammer | |||||
| Length (Less bit) |
Weight | Outer diameter | Connection Thread | Bit Shank | Hole Range |
| 1178mm | 73.6KG | φ125mm | API 2 3/8" REG | SD5 | φ135-155mm |
| Work Pressure | Recommended rotation speed | Air Consumption | |||
| 1.0Mpa | 1.8Mpa | ||||
| 1.0-2.5 Mpa | 30-60 r/min | 9m3/min | 15m3/min | ||
For Mor information about SD6 SD8 SD10 SD12, please contact us:
Anna Ling
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