High Quality DHD350A 222mm DTH Hammer Bit For Hard Rock Mining Water Well Drilling Tool
Price:
＄550
MOQ:
1
Delivery Time:
Negotiable
Brand:
MIROC
Product Description
DHD350A 222mm DTH Hammer Bit for Hard Rock Mining & Water Well Drilling
Product Overview
The DHD350A 222mm DTH hammer bit is a premium-grade down-the-hole drilling tool engineered for demanding hard rock mining, water well drilling, quarrying, and construction applications. Featuring the DHD350A shank configuration with a valveless air distribution design, this bit delivers exceptional penetration rates, superior wear resistance, and reliable performance in the most challenging geological conditions.
The DHD350A is the without foot valve version of the DHD350 series, designed for high air pressure operation (1.0-2.5 MPa), offering simpler internal structure, longer service life, and easier maintenance compared to valved designs.
DHD350 High Air Pressure DTH Bit Specifications
| Diameter (mm/in) | Buttons and Size (mm) | Flushing Hole | Weight (kg) | Part Number |
|---|---|---|---|---|
| DHD350 Ballistic button/Concave face | ||||
| 130 / 5 1/8 | 4×14,3×14 | 8×16 | 15 | 4148301310 |
| 133 / 5 1/4 | 4×14,3×14 | 8×16 | 15 | 4148301311 |
| 140 / 5 1/2 | 4×14,4×14 | 8×16 | 16 | 4148301312 |
| 146 / 5 3/4 | 4×14,4×14 | 8×16 | 18 | 4148301313 |
| 152 / 6 | 4×16,4×16 | 8×18 | 20 | 4148301314 |
| DHD350 Spherical button/Concave face | ||||
| 130 / 5 1/8 | 4×14,3×14 | 8×16 | 15 | 4148301315 |
| 133 / 5 1/4 | 4×14,3×14 | 8×16 | 15 | 4148301316 |
| 140 / 5 1/2 | 4×14,4×14 | 8×16 | 16 | 4148301317 |
| 146 / 5 3/4 | 4×14,4×14 | 8×16 | 18 | 4148301318 |
| 152 / 6 | 4×16,4×16 | 8×18 | 20 | 4148301319 |
| DHD350 Ballistic button/Convex face | ||||
| 130 / 5 1/8 | 3×14,4×14 | 9×16 | 15 | 4148301320 |
| 133 / 5 1/4 | 3×14,4×14 | 9×16 | 15 | 4148301321 |
| 140 / 5 1/2 | 3×16,4×16 | 9×16 | 16 | 4148301322 |
| 146 / 5 3/4 | 3×16,4×16 | 9×16 | 18 | 4148301323 |
| 152 / 6 | 3×16,5×16 | 9×18 | 20 | 4148301324 |
| DHD350 Spherical button/Flat face | ||||
| 130 / 5 1/8 | 7×14 | 8×16 | 15 | 4148301325 |
| 133 / 5 1/4 | 7×14 | 8×16 | 15 | 4148301326 |
| 140 / 5 1/2 | 7×14 | 7×18 | 16 | 4148301327 |
| 140 / 5 1/2 | 8×14 | 9×16 | 16 | 4148301328 |
| 146 / 5 3/4 | 8×14 | 9×16 | 18 | 4148301329 |
| 152 / 6 | 8×16 | 9×18 | 20 | 4148301330 |
Design Features
| Feature | Description | Benefit |
|---|---|---|
| Valveless Distribution | No foot valve design, air distributed directly | More reliable, fewer internal parts |
| Optimized Flushing | Strategically positioned air holes | Efficient cuttings removal, prevents bit balling |
| Multiple Head Profiles | Concave / Flat / Convex options | Adaptable to different rock conditions |
| Premium Carbide Buttons | Spherical and ballistic button configurations | Superior wear resistance and fast penetration |
Head Profile Options
| Profile | Best For | Key Benefit |
|---|---|---|
| Concave | Hard, abrasive rock | Shearing action, prevents bit balling |
| Flat | Medium-hard rock | Balanced cutting, versatile |
| Convex | Extremely hard rock | Concentrates impact energy in center |
Applications
| Industry | Application |
|---|---|
| Mining | Blast hole drilling, ore extraction |
| Water Well | Large diameter water well construction |
| Quarrying | Aggregate production, dimension stone |
| Construction | Foundation drilling, piling |
| Geothermal | Geothermal well drilling |
Quality Assurance
- 100% Dimensional Inspection - Guarantees precise fit with DHD350A hammers
- Hardness Testing - Ensures consistent material properties
- Button Integrity Check - Verifies secure brazing and proper seating
- ISO 9001 Certified - Manufactured under strict quality management systems
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
KSQ Technologies (Beijing) Co. Ltd
Location
Room9-616, No. 10 Zhenxing Road (MDW Plaza), Changping District, 102200 Beijing, China
Contact Person
Yingkai Zhang