ND25A
ND25A
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.
ND25A Structure
| Ref. | Parts | Weight | Part No. | Ref. | Parts | Weight | Part No. |
|---|---|---|---|---|---|---|---|
| 01 | Top Sub | 3.5 Kg | 01-ND25A-01 | 08 | Piston Case | 4.5 Kg | 01-ND25A-08 |
| 02 | “O”Ring | 0.01 Kg | 01-ND25A-02 | 09 | Guided Sleeve | 0.7 Kg | 01-ND25A-09 |
| 03 | Check Valve | 0.13 Ko | 01-ND25A-03 | 10 | Retainer Ring | 0.1 Kg | 01-ND25A-10 |
| 04 | Sprinc | 0.02 Kg | 01-ND25A-04 | 11 | “0”Ring | 0.01 Kg | 01-ND25A-11 |
| 05 | Valve Seat | 0.56 Kg | 01-ND25A-05 | 12 | Drive Chuck | 1.5 Kg | 01-ND25A-12 |
| 06 | Inner Cylinder | 11 Kg | 01-ND25A-06 | 13 | Drill Bit | 01-ND25A-13 | |
| 07 | Piston | 3.8 Kg | 01-ND25A-07 |
Technical Parameter
| Length(Less bit) | Weight | Outer Diameter | Connection Thread | Bit Shank | Hole Range |
|---|---|---|---|---|---|
| 872mm | 16Kg | φ71mm | T48*10*1.5 | ND25A | φ76-φ90mm |
| Work Pressure | Recommended Rotation Speed | Air Consumption | |||
| 1.0Mpa | 1.5Mpa | ||||
| 1.0-1.7 Mpa | 30-50 r/min | 3m³/min | 4.5m³/min | ||
Contact us
Request A Quote
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