RC545 Reverse Circulation Nrc Series Hard Rock Drilling DTH Hammers
NRC series reverse circulation DTH hammer is the latest developed
product of our company. It is mainly used for deep exploration
drilling and core sampling.
| Product name | DTH Hammer |
| Material | Alloy Steel&Tungsten Carbide |
| Use | Underground Mining,Water well,Mining,Quarry etc. |
| Color | Green&Others |
| Heat treatment | Anneal |
| Shank series |
DHD,COP,MISSION, SD, DHD, BR, QL, BR,CIR etc. |
| Application | heavy construction,Ore Drilling, mining, oil and gas, quarries |
Hole |
60-305mm |
| Size | 2/3/4/5/6/7/8/9/10/12/14 inches |
| Advantage | High Performance and factory price |
The Characteristics of RC Hammers
RC series reverse circulation DTH Hammer is the latest developed
product of our company. It is mainly used for deep exploration
drilling and ore grade control.
It has the following characteristics:
1. Based on previous experience of ordinary hammers, combined with
the features of reverse circulation hammer, optimized internal
structure and ideal energy transfer, thus ensuring the series of
hammers drilling with fast, smooth and continuous sampling.
2. The internal structure is very simple with components of high
rigidity, thus ensuring long life and easy maintenance of the
hammer.
3. The collection tube adopts an integrative design and can be
replaced without disassembling the hammer. With carburizing
treatment, it has good abrasive resistance.
4. Equipped with bits designed with patent. Simply by replacing the
drill bit, the same hammer can drill holes of different sizes
ensuring that the sample is not contaminated.
5. In difficult conditions such as loose soil, hard rock and plenty
of water exists, sampling can be done well.
Reverse Circulation Hammers Specification:
| Reverse Circulation Hammers |
| Description | Weight(kg) |
| RC45 | RC55 | RC65 | RC52 |
| 1. Internal Circlip | 0.03 | 0.04 | 0.05 | 0.04 |
| 2. Air Screen | 0.35 | 0.44 | 0.65 | 0.44 |
| 3. Top Sub | 6.50 | 9.65 | 20.00 | 9.65 |
| 4. "O" Ring | 0.01 | 0.02 | 0.02 | 0.02 |
| 5. Sample Tube | 5.10 | 6.72 | 12.50 | 6.75 |
| 6. Check Valve | 0.25 | 0.68 | 0.85 | 0.68 |
| 7. Spring | 0.04 | 0.12 | 0.10 | 0.12 |
| 8. "O" Ring | 0.01 | 0.02 | 0.02 | 0.02 |
| 9. Air Distributor | 0.85 | 1.48 | 3.50 | 1.48 |
| 10. "O" Ring | 0.02 | 0.01 | 0.02 | 0.01 |
| 11. Internal Cylinder | 2.20 | 4.12 | 4.20 | 4.12 |
| 12. Piston | 8.50 | 16.90 | 24.00 | 16.90 |
| 13. External Cylinder | 14.50 | 19.50 | 32.00 | 21.50 |
| 14. Guided Sleeve | 1.20 | 0.90 | 5.50 | 1.90 |
| 15. "O" Ring | - | - | - | 0.02 |
| 16. Stop "O" Ring | - | - | - | 0.01 |
| 17. Stop Ring | - | - | - | 0.32 |
| 18. Shrout | - | - | - | 1.86 |
| 19. Drive Chuck | 3.20 | 5.65 | 6.50 | 4.17 |
| 20. Bit Retaining Pin | 0.01 | 0.15 | 0.30 | - |
| 21. Drill Bit | 10.50 | 15.80 | 31.00 | 11.05 |
| Technical Data | |
| Model | NRC45 | NRC55 | NRC65 | NRC52 |
| Length (Without Bit) | 1020mm | 1111mm | 1250mm | 1208mm |
| Weight (Without Bit) | 94.00kg | 66.50kg | 110.00kg | 70.00kg |
| External Diameter | φ99mm | φ126mm | φ146mm | φ126mm |
| Bit Shank | NRC45 | NRC55 | NRC65 | PR52 |
| Hole Range | φ114 - φ127mm | φ133- φ152mm | φ155- φ190mm | φ133- φ146mm |
| Connection Thread | As required | As required | As required | As required |
| Working Pressure | 1.0 - 3.0 Mpa | 1.5 - 3.5 Mpa | 1.5 - 3.5 Mpa | 1.5 - 3.5 Mpa |
| Impact Rate at 17 Bar | 30HZ | 35HZ | 28HZ | 35HZ |
| Recommended Rotation Speed | 25 - 40 r/min | 25 - 40 r/min | 25 - 40 r/min | 25 - 40 r/min |
| Air Consumption | 1.0Mpa: 8 m³/ min | 1.7Mpa: 16 m³/ min | 1.7Mpa: 20 m³/ min | 1.7Mpa: 16 m³/ min |
| 1.8Mpa: 12 m³/ min | 2.4Mpa: 22 m³/ min | 2.0Mpa: 26 m³/ min | 2.4Mpa: 22 m³/ min |
| 2.4Mpa: 16 m³/ min | 3.0Mpa: 28 m³/ min | 3.0Mpa: 35 m³/ min | 3.0Mpa: 28 m³/ min |
Applications
1. Mine and quarry
2. Road construction for the drilling and blasting work
3. Water well drilling
4. Slope protection
