ND55A
ND55A
DTH Hammer
This Series high air pressure DTH hammer work without foot-valve is designed and developed by our own, which is the one of the most leading DTH hammer in the world.
- Avoid the problem happens on foot valve, fracture, expansion and contraction.
- Lower air comsumption and higher impact frequency. 15-30% higher drilling efficiency than the bit with foot valve.
- Simpler structure and less spare parts, makes easier and cheaper maintenance.
- Heat-hardended spare parts, makes longer serving life and less problem.
- Thread connection for top sub and drive chuck, make easier disassembly.
ND55A Structure
| Ref. | Parts | Weight | Part No. | Ref. | Parts | Weight | Part No. |
|---|---|---|---|---|---|---|---|
| 01 | Top Sub | 14 Kg | 01-ND55A-01 | 08 | Piston Case | 24.2 Kg | 01-ND55A-08 |
| 02 | “O”Ring | 0.01 Kg | 01-ND55A-02 | 9 | Guided Sleeve | 2.64 Kg | 01-ND55A-09 |
| 03 | Check Valve | 0.6 Kg | 01-ND55A-03 | 10 | Retainer Ring | 0.5 Kg | 01-ND55A-10 |
| 04 | Spring | 0.06 Kg | 01-ND55A-04 | 11 | “O”Ring | 0.01 Kg | 01-ND55A-11 |
| 05 | Valve Seat | 2.15 Kg | 01-ND55A-05 | 12 | Drive Chuck | 7 Kg | 01-ND55A-12 |
| 06 | Inner Cylinde | 3.3 Kg | 01-ND55A-06 | 13 | Drill Bit | 01-ND55A-13 | |
| 07 | Piston | 15.5 Kg | 01-ND55A-07 |
Technical Parameter
| Length(Less bit) | Weight | Outer Diameter | Connection Thread | Bit Shank | Hole Range |
|---|---|---|---|---|---|
| 1122mm | 70Kg | φ126mm | API2 3/8″REG | ND55A | φ136-φ155mm |
| Work Pressure | Recommended Rotation Speed | Air Consumption | |||
| 1.0Mpa | 1.5Mpa | ||||
| 1.0-2.5 Mpa | 30-60 r/min | 7m³/min | 13m³/min | ||
Contact us
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Welcome to contact us at any time to get the latest product information and quotations.
Email address
info@rockdrillmaster.com
sales@rockdrillmaster.com
Phone numbers
Mobile : +86 188 2419 8826
Our location
Pingjiang Industrial Park, Yueyang,
Hunan Province, China