Product Overview
SD4 DTH drill bit delivers reliable penetration performance and excellent durability in medium-diameter drilling operations.
Widely used in mining, quarrying, water well drilling, geothermal drilling, and infrastructure projects, SD4 bits provide stable drilling efficiency in medium to hard rock formations such as granite, basalt, limestone, and marble.
Manufactured with high-strength alloy steel and premium tungsten carbide buttons, SD4 DTH bits help improve drilling productivity while reducing operational downtime and bit replacement costs.
Key Highlights
- Optimized button layout for faster penetration rates and more efficient energy transfer
- Suitable for medium-diameter drilling applications
- Available Profiles: Concave, Convex, Flat, Drop Center
- Stable drilling performance in hard rock conditions
- Long service life and reduced drilling costs
Looking for a Reliable SD4 DTH Bit for Your Drilling Project?
Choosing the right DTH drill bit can significantly improve drilling efficiency, reduce downtime, and lower overall operating costs. Explore the key advantages of our SD4 DTH drill bits and find the ideal solution for your rock drilling applications.
Why Choose SD4 DTH Drill Bits?
SD4 DTH drill bits are engineered to provide a balance of drilling speed, durability, and hole quality in demanding drilling environments.
Faster Rock Drilling
Optimized button layout for efficient rock fragmentation.
Benefits
SD4 Bit Features
SD4 DTH drill bits are designed with optimized structures to improve drilling efficiency and durability in various geological conditions.
High Penetration Rate
Increased Button Count + Optimized Design
Excellent Adaptability
Multiple Face Profiles to Suit Diverse Geological Conditions
Extended Service Life
Premium Materials + Precision Insertion Process
High Cost-Effectiveness
Reduces Tool Consumption and Minimizes Downtime
Ready to Match the Right QL60 Bit to Your Drilling Needs?
Different bit structures and designs directly impact drilling efficiency and cost per meter. Let our team help you select the optimal QL60 size and configuration based on your hole diameter, rock formation, and project requirements.
SD4 Available Sizes & Specifications
Available SD4 Size Ranges
| Nominal diameter (mm) | Side teeth | Middle teeth | Connection with DTH Hammer | Weight (kg) | KELLEG P/N |
| φ115 | 7×φ16 | 2xφ14+4×φ14 | SD4 | 9.0 | KQZG115T-SD4 |
| φ125 | 8×φ14 | 3xφ13+4×φ14 | SD4 | 9.6 | KQZG125T-SD4 |
| φ127 | 8×φ14 | 7×φ13 | SD4 | 9.7 | KQZG127P-SD4 |
| φ130 | 8×φ14 | 7×φ14 | SD4 | 9.9 | KQZG130P-SD4 |
General Technical Specifications
| Parameter | Specification |
| Shank Type | SD4 |
| Hole Diameter Range | 115–130 mm |
| Applicable Wind Pressure（MPa） | 1.6-2.5 |
| Button Material | Tungsten Carbide |
| Skirt Body Material | High-strength alloy steel |
| Face Design Options | Flat / Concave / Convex / Drop Center |
| Button Types Options | Spherical (Domed)/ Ballistic/ Semi-Ballistic |
| Flushing Holes | Optimized flushing hole design for efficient cuttings removal |
| Heat Treatment | Advanced heat treatment for enhanced wear resistance and fatigue strength |
| Suitable Rock Formations | Medium to Hard Rock |
Looking for Better Drilling Efficiency?
Our SD4 DTH drill bits are optimized for different rock formations and drilling conditions.
Contact us for customized recommendations to improve penetration rate and reduce drilling costs.
Applications of SD4 DTH Drill Bits
SD4 DTH bits are widely used in projects requiring reliable medium-diameter rock drilling performance.
SD4 DTH Drill Bit Selection Guide for Different Drilling Conditions
Choose According to Rock Formation
Hard abrasive rock → Flat face + spherical buttons
Medium formations → Concave face + semi-ballistic buttons
Softer formations → Convex face + ballistic buttons
Match Air Pressure & Hammer Performance
Ensure sufficient air pressure and airflow for efficient hammer operation and cutting removal.
Confirm Hole Diameter Requirement
Select the appropriate bit diameter according to project specifications and drilling rig capability.
Consider Drilling Depth
Deep drilling projects may require enhanced face designs for improved hole stability.
Why Customers Work With Us
Reliable Quality and Stable Supply for Drilling Projects Worldwide
Every SD4 DTH drill bit is produced under strict manufacturing standards to ensure:
- Stable drilling performance
- Reliable wear resistance
- Accurate dimensional consistency
- Long operational lifespan
Advanced CNC machining and controlled heat treatment processes help maintain product reliability in demanding drilling environments.
We maintain reliable production capacity to support:
- Standard product orders
- Bulk quantity requirements
- Urgent project deliveries
- Long-term distributor cooperation
Our team works closely with logistics partners to ensure efficient global shipping and on-time delivery.
Different formations require different drilling solutions.
Our technical team can help recommend suitable:
- Bit face designs
- Button configurations
- Hole diameter options
- Drilling parameter adjustments
This helps customers improve penetration rate and reduce drilling costs.
We support customized drilling solutions based on project and market requirements, including:
- Custom bit diameters
- Face structure optimization
- Private label branding
Packaging customization
Our goal is to provide SD4 DTH drill bits that deliver reliable quality, stable supply, and dependable drilling performance for mining, quarrying, water well, and construction projects worldwide.
Trusted Manufacturing & Global Supply Support
We understand that drilling contractors and distributors need more than just drilling tools — they need a supplier capable of delivering consistent quality, stable production capacity, and responsive technical support.
Our SD4 DTH drill bits are manufactured using carefully controlled production processes to ensure reliable drilling performance across different geological conditions and project requirements.
Need a Reliable SD4 DTH Bit Supplier for Your Next Project?
We will recommend the most suitable SD4 DTH drill bit solution based on your drilling application.
Frequently Asked Questions About
SD4 DTH Drill Bits
SD4 DTH drill bits are used for medium-diameter drilling applications in mining, quarrying, water well drilling, and construction projects.
SD4 bits are specifically designed for SD4 DTH hammer series.
SD4 bits perform well in granite, basalt, limestone, marble, and other medium to hard rock formations.
SD4 bits are commonly available in hole diameters ranging from 105 mm to 130 mm.
Selection depends on rock hardness, drilling depth, air pressure, and required penetration rate.
Yes. We provide custom diameters, face designs, button configurations, and OEM branding services.
Get a Tailored SD4 Drilling Solution
Every drilling project is different.
Send us your requirements, and we will provide a custom SD4 DTH bit solution optimized for your rock conditions and drilling goals.
Provide us with the following information:
- DTH hammer model
- Required hole diameter
- Rock formation
- Compressor pressure and air volume
Our technical team will recommend the most suitable SD4 DTH drill bit configuration for your drilling project.
Send us your requirements through the contact form to receive expert advice and a quotation.
