Product selling point
Main features:
1. Drill bit don't need foot valve, so avoid troubles happen of foot valve fracture, damage and expansion and contraction.
2. Lower energy consumption and higher impact frequency. The drilling speed is 15%-30% higher than DTH hammer with foot valve.
3. Simple structure, less spare parts, easy and cheap maintenance.
4. Internal parts are hardened, long working life and less failure.
5. The top sub and the drive chuck are connected with the external cylinder by thread, which is easy to disassemble.
Item Description
| Item Description | SD4A | SD5A | SD6A | SD8A | SD10A | SD12A |
| 1. Top Sub | 6.50 | 13.70 | 20.00 | 34.00 | 59.00 | 70.00 |
| 2. “O” Ring of Top Sub | 0.10 | 0.015 | 0.015 | 0.015 | 0.03 | 0.04 |
| 3. Breakout Ring | - | - | - | 0.30 | 0.50 | 0.80 |
| 4. Check Valve | 0.35 | 0.70 | 0.70 | 1.20 | 1.40 | 2.00 |
| 5. Spring | 0.05 | 0.10 | 0.10 | 0.10 | 0.30 | 0.10 |
| 6. Air Distributor | 1.50 | 2.00 | 3.50 | 6.00 | 10.50 | 16.00 |
| 7. Internal Cylinder | 2.10 | 2.80 | 4.20 | 6.50 | 12.50 | 25.00 |
| 8. Piston | 8.50 | 15.00 | 23.00 | 42.50 | 77.00 | 113.00 |
| 9. External Cylinder | 15.30 | 24.00 | 28.00 | 59.00 | 110.00 | 175.00 |
| 10. Guided Sleeve | 1.30 | 2.60 | 2.50 | 6.00 | 11.50 | 25.00 |
| 11. “O” Ring of Stop Ring | 0.005 | 0.01 | 0.01 | 0.01 | 0.01 | - |
| 12. Stop Ring | 0.20 | 0.50 | 0.50 | 1.20 | 1.50 | 4.50 |
| 13. Breakout Ring | - | - | - | 0.30 | 0.50 | 0.08 |
| 14. Drive Chuck | 4.00 | 7.50 | 7.50 | 16.00 | 31.50 | 48.00 |
| 15. Drill Bit | - | - | - | - | - | - |
Technical Parameters
Technical Parameters | SD4A | SD5A | SD6A | SD8A | SD10A | SD12A |
Length (Without Bit) | 1012mm | 1090mm | 1011mm | 986mm | 1110mm | 1110mm |
Weight (Without Bit) | 40kg | 70kg | 43.2kg | 37kg | 69kg | 66kg |
Outer Diameter | Ø99mm | Ø126mm | Ø146mm | Ø180mm | Ø226mm | Ø275mm |
Connection Thread | API2 3/8" REG | API2 3/8" REG | API3 1/2" REG | API4 1/2" REG | API6 5/8" REG | API6 5/8" REG |
Bit Shank | SD4 | SD5 | SD6 | SD8 | SD10 | SD12 |
Hole Range | Ø110-Ø135mm | Ø155-Ø190mm | Ø155-Ø203mm | Ø195-Ø254mm | Ø254-Ø311mm | Ø305-Ø445mm |
Working Pressure | 1.2-2.0Mpa | 1.3-2.3Mpa | 1.5-2.5Mpa | 1.5-3.0Mpa | 2.0-3.5Mpa | 2.0-3.5Mpa |
Recommended Rotation Speed | 25-40r/min | 20-35r/min | 20-30r/min | 15-25r/min | 20-30r/min | 15-25r/min |
Air Consumption | 1.0Mpa: 6m³/min | 1.0Mpa: 7m³/min | 1.0Mpa: 9m³/min | 1.0Mpa: 12m³/min | 1.8Mpa: 14m³/min | 1.0Mpa: 28m³/min |
DTH hammer SD4A/SD5A/SD6A/SD8A/SD10A/SD12A
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Contact Us
E-mail: zyzcjx@163.com
Add: No.11 Tongyang East Road,Jingzhang Olympic Park Area, Xuanhua District, Zhangjiakou City, Hebei, China
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