SD12 DTH Drill Bit – 12 Inch Large Hole Mining DTH Button Bit for 305-500mm Well Drilling (Down the Hole Hammer Bit)
Price:
$3900
MOQ:
1
Delivery Time:
20-30
Brand:
MIROC
Product Description
SD12 DTH Drill Bit – 12 Inch Large Hole Mining DTH Button Bit
Professional 12-inch DTH (Down-The-Hole) drill bit designed for 305-500mm well drilling applications in demanding mining and construction environments.
High-Performance DTH Drill Bits for Deep Hole Drilling
Engineered for high-pressure drilling operations, our 12-inch DTH drill bits deliver consistent penetration rates even in deep holes. Direct piston-to-bit contact minimizes energy loss, ensuring efficient rock fragmentation across long borehole lengths.
Available Options
- Colors: Green, Blue, or custom requirements
- Customization: Match bits to your hammer by hole diameter and spline configuration
- Custom Features: Tungsten carbide insert profile, face profile, and flushing hole design
Insert Profile Selection Guide
Ballistic Inserts
- Best for: Soft and medium compact, low abrasive rocks
- Produces: Large cuttings
- Not suitable for: Badly fractured rocks
Domed Inserts
- Best for: Very hard, abrasive rocks and deep hole drilling
- Features: Strong, rugged shape for high performance and long service life in all conditions
Semi-Ballistic Inserts
- Best for: All soft and medium rock conditions, including fractured and fissured rocks
Face Profile Selection Guide
| Face Type | Best Rock Conditions | Key Benefit |
|---|---|---|
| Flat Face | All conditions, especially fractured/fissured rocks & changing formations | Reliable, alternative design |
| Concave | All conditions, especially deep hole drilling | Inverted pilot improves hole alignment |
| Convex | All conditions, especially hard abrasive rock | Balances fast drilling with long service life |
Key Features & Technical Specifications
- Direct piston-to-bit contact for minimal energy loss
- Nearly constant penetration rate regardless of hole length
- Medium to large drilling diameters
- Works in high-pressure range for deep hole lengths
- High-grade tungsten carbide inserts
- Bit bodies: high-grade steel with CNC machining and advanced heat treatment
Technical Specifications Table
| Head Shape | Head Diameter (mm) | Shank Length (mm) | Spline | Port holes | Button Type | Gauge Buttons | Front buttons | Weight (Kg) |
|---|---|---|---|---|---|---|---|---|
| Convex-Concave Face | 305 | 470 | 8 | 3 | Spherical | 15XΦ20 | 27XΦ18+8XΦ16 | 146.5 |
| Convex-Concave Face | 311 | 470 | 8 | 3 | Spherical | 15XΦ20 | 27XΦ18+8XΦ16 | 147 |
| Convex-Concave Face | 325 | 470 | 8 | 3 | Spherical | 15XΦ20 | 27XΦ18+9XΦ16 | 156 |
| Convex-Concave Face | 350 | 470 | 8 | 4 | Spherical | 16XΦ20 | 32XΦ18+13XΦ16 | 166 |
| Convex-Concave Face | 381 | 470 | 8 | 4 | Spherical | 16XΦ20 | 36XΦ18+18XΦ16 | 184 |
| Convex-Concave Face | 400 | 470 | 8 | 4 | Spherical | 16XΦ20 | 40XΦ18+28XΦ16 | 199 |
| Convex-Concave Face | 445 | 470 | 8 | 4 | Spherical | 20XΦ20 | 48XΦ18+25XΦ16 | 237.5 |
| Convex-Concave Face | 500 | 470 | 8 | 4 | Spherical | 24XΦ20 | 90XΦ18 | 293 |
Applications
Underground mining
Tunneling
Quarry benching operations
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