4 inch DTH Hammer DHD340 Cop44 Mission40 SD4 Ql40
Product Specifications
| Attribute | Value |
| Manufacturing Process | Forging |
| Material | Alloy Steel |
| Connection Thread | API 3 1/2" Reg |
| Hole Range | Dia 155 - 190 mm |
| Working Pressure | 1.0 - 2.5MPa |
| Compatible Bit Shank | Mission60 / Cm60A |
| Transport Package | Ply-Wooden Cases for Exporting |
| Specification | 2 inch to 12 inch |
| Trademark | Super Diamond |
| Origin | China |
| HS Code | 8207199000 |
Product Advantages
- 95% compatibility with original products
- High quality raw materials with premium hardening for extended lifespan
- Full production chain ensures stable and prompt delivery
- Experienced technicians and engineers with extensive industry knowledge
- Customization options with efficient service
- Competitive pricing compared to major brands while maintaining superior quality
- Global reputation with satisfied customers in France, Spain, Italy, South Africa, Australia, Iran, Malaysia, and more
Advantages of Hammers Without Foot Valve
- Eliminates concerns about foot valve breakage, distortion, or expansion
- 15-30% higher drilling speed with lower energy consumption
- Simplified design with reliable components for longer lifespan
- Reduced air and oil consumption (approximately 10% less oil)
- Easier and more cost-effective maintenance
Product Photos
Technical Specifications
| Hammers | Bit Shank | Connection Thread | Suitable Bit | Working Pressure | Air Consumption |
| 1-3" Middle-low pressure DTH hammers | BR1 | RD40 box | 64-76mm | 0.7-1.75Mpa | 4.5m³/min |
| 3" hammers | DHD3.5 | API 2 3/8"Reg | 90-110mm | 1.0-1.5Mpa | 4.5m³/min |
| 4" hammers | DHD340 | API 2 3/8"Reg | 105-130mm | 1.0-2.5Mpa | 6m³/min |
| 5" hammers | DHD350 | API 2 3/8"Reg/API 3 1/2"Reg | 130-156mm | 1.0-2.5Mpa | 9m³/min |
| 6" hammers | DHD360 | API 3 1/2"Reg | 152-203mm | 1.0-2.5Mpa | 10m³/min |
| 8" hammers | DHD380 | API 4 1/2"Reg | 200-279mm | 1.0-2.5Mpa | 15m³/min |
| 10" hammers | SD10 | API 6 5/8"Reg | 254-330mm | 1.0-2.5Mpa | 22m³/min |
| 12" hammers | DHD1120 | API 6 5/8"Reg | 305-381mm | 1.0-2.5Mpa | 30m³/min |
Production Process
Company Overview
We are a leading manufacturer of rock drilling tools, including DTH hammers and bits, RC hammers and bits, top hammer button bits, and ODEX systems. Our 26,600 square meter facility in LiuYang city, HuNan province, China includes 22,000 square meters of production space.
With premium quality, professional service, and competitive pricing, we've earned an excellent reputation among domestic and international customers in Brazil, Peru, South Africa, Australia, Turkey, Russia, Ukraine, Korea, and more.
Factory Overview
Our Team
Certifications
Quality Warranty
All products are manufactured using high-quality steel with strict inspection of spare parts before shipping. We provide quick responses to any complaints or suggestions.
Packaging & Shipping
Frequently Asked Questions
1. Are you a manufacturer or a trade company?
We are a manufacturer of rock drilling equipment and pneumatic tools in China.
2. How many workers in your factory and what is your company scale?
We have over 100 employees across production, sales, quality control, R&D, and management. Our 26,600 m² facility includes 22,000 m² of workshop space with 400+ advanced equipment sets. 50-70% of production is exported globally.
3. Where is your company located?
Located in Changsha city, Hunan province, 1.5 hours from Huanghua International Airport and 2.5 hours by express train from Guangzhou.
4. Why choose CJG DRILL?
- 17+ years of experience in R&D, manufacturing, and exporting
- High quality compatible with major brands
- Competitive pricing
- Excellent service
5. Which port do you ship from?
Primarily Shanghai port, with Guangzhou port also available.
6. Do you accept OEM & ODM?
Yes, both OEM and ODM services are available.
7. What is your minimum order quantity?
MOQ is 1 piece or 1 complete set, with pricing based on order quantity.
8. What payment terms do you accept?
T/T, L/C at sight, Western Union, and cash payments.
9. What is your typical delivery time?
Approximately one month, regardless of season.
10. Can we schedule a factory visit?
Absolutely. We can arrange hotel reservations, airport/train station pickup, and full hosting services for visiting customers.
We welcome all customers to visit our factory and explore our extensive product range!
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