DHD DTH drill bits are a down-the-hole drilling bit designed to work with DHD series DTH hammers, widely used in mining, water well drilling, quarrying, and construction projects.
It transfers impact energy directly to the rock bottom, achieving high drilling efficiency and accurate hole alignment.
Optimized button layout ensures efficient rock breaking and faster drilling speed.
Premium carbide buttons and advanced heat treatment reduce wear and breakage.
Balanced bit structure minimizes deviation and improves drilling accuracy.
Compatible with standard DHD hammers from major brands.
Longer lifespan and stable performance help reduce overall drilling cost.
| DHD Series | Typical Hole Diameter |
| DHD 3.5 | 90–105 mm |
| DHD 340 | 105–130 mm |
| DHD 350 | 130–152 mm |
| DHD 360 | 152–203 mm |
| DHD 380 | 203–305 mm |
| DHD Series | Nominal Dia. (mm) |
Side Teeth QTY*Dia. |
Middle Teeth QTY*Dia. |
Connection with DTH Hammer |
Weight (kg) |
Specification |
 |
φ90 | 6×φ14 | 2xφ12+2×φ13 | DHD3.5/IR3.5/HD35A | 4.5 | KQZG90T |
| φ90 | 6×φ14 | 4xφ12 | DHD3.5/IR3.5/HD35A | 4.5 | KQZG90P | |
| φ95 | 6×φ14 | 2xφ13+2×φ13 | DHD3.5/IR3.5/HD35A | 4.6 | KQZG95T | |
| φ100 | 6×φ14 | 2xφ13+3×φ13 | DHD3.5/IR3.5/HD35A | 4.8 | KQZG100T | |
| φ105 | 6×φ14 | 2xφ13+3×φ13 | DHD3.5/IR3.5/HD35A | 5.0 | KQZG105T | |
| φ105 | 8×φ13 | 6×φ12 | DHD3.5/IR3.5/HD35A | 5.0 | KQZG105P | |
| φ115 | 7×φ16 | 2xφ14+4×414 | DHD340/HD45 | 8.2 | KQZG115T | |
| φ125 | 8×φ14 | 3xφ13+4×φ14 | DHD340/HD45 | 8.8 | KQZG125T | |
| φ127 | 8×φ14 | 7×φ13 | DHD340/HD45 | 8.9 | KQZG127P | |
| φ130 | 8×4φ14 | 7×414 | DHD340/HD45 | 9.1 | KQZG130P | |
| φ140 | 7×φ18 | 3xφ14+4×φ15 | DHD350/HD55 | 15.3 | KQZG140T | |
| φ140 | 8×φ16 | 8×φ14 | DHD350/HD55 | 15.5 | KQZG140P | |
| φ146 | 8×φ18 | 8×φ15 | DHD350/HD55 | 16.1 | KQZG146P | |
| φ146 | 8×φ18 | 4xφ15+3×φ14 | DHD350/HD55 | 16.0 | KQZG146A | |
| φ152 | 8×φ18 | 8×φ15 | DHD350/HD55 | 16.6 | KQZG152P | |
| φ152 | 8×φ18 | 4xφ16+4×φ14 | DHD350/HD55 | 16.4 | KQZG152A | |
| φ165 | 8×φ18 | 8×φ16 | DHD360/HD65 | 24.6 | KQZG165P | |
| φ165 | 8×φ18 | 4xφ16+4×φ16 | DHD360/HD65 | 24.4 | KQZG165T | |
| φ165 | 8×φ18 | 4xφ16+4×φ15 | DHD360/HD65 | 24.1 | KQZG165A | |
| φ171 | 8×φ18 | 6xφ16+4×φ16 | DHD360/HD65 | 24.8 | KQZG171A | |
| φ178 | 8×φ18 | 6xφ16+4×φ16 | DHD360/HD65 | 25.4 | KQZG178A | |
| φ190 | 10×φ18 | 8xφ16+5×φ16 | DHD360/HD65 | 26.9 | KQZG190A | |
| φ203 | 10×φ18 | 8×φ18+5×φ16 | DHD380/HD85 | 47.0 | KQZG203A | |
| φ216 | 10×φ18 | 8×φ18+6×φ16 | DHD380/HD85 | 51.2 | KQZG216A | |
| φ219 | 10×φ18 | 8×φ18+6×φ16 | DHD380/HD85 | 51.7 | KQZG219A | |
| φ229 | 12×φ18 | 12×φ16+7×φ16 | DHD380/HD85 | 53.3 | KQZG229A | |
| φ235 | 12×φ18 | 12×φ16+7×φ16 | DHD380/HD85 | 54.3 | KQZG235A | |
| φ245 | 12×φ19 | 12×φ16+8×φ16 | DHD380/HD85 | 58.4 | KQZG245A |
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Download BrochureChoosing the right DHD DTH drill bit is critical to achieving high penetration rates, long service life, and stable hole quality.
The correct selection depends on DTH hammer compatibility, hole diameter, rock formation, and operating conditions.
The first and most important step is to ensure full compatibility between the drill bit and the DHD hammer. Each DHD DTH drill bit is designed to match a specific DTH hammer.
| Hammer Model | Matching DHD DTH Drill Bit |
| DHD 3.5 | DHD 3.5 drill bit |
| DHD 340 | DHD 340 drill bit |
| DHD 350 | DHD 350 drill bit |
| DHD 360 | DHD 360 drill bit |
| DHD 380 | DHD 380 drill bit |
DHD DTH drill bits are available in a wide range of hole diameters.
Choosing the correct diameter depends on project requirements and drilling application.
Tip: Always confirm the recommended hole diameter range for your specific DHD hammer model.
Button design plays a decisive role in drilling performance and bit life.
Spherical Buttons
Best for: Medium-hard rock with high abrasiveness
Advantages:
Ballistic (Semi-Ballistic) Buttons
Best for: Medium-hard rock that is relatively brittle but not highly abrasive
Advantages:
Beyond hardness, rock abrasiveness significantly affects bit performance.
Highly abrasive formations require:
High-impact conditions require:
Tip: In highly abrasive conditions, prioritize durability over penetration speed.
DHD DTH drill bits perform best when matched with the correct air pressure and air volume.
Recommended practice:
For projects where hole straightness and accuracy are critical (such as foundation drilling or controlled blasting):
Choose bits with:
This helps reduce hole deviation and improves overall drilling accuracy.
If your project involves challenging formations or special requirements, standard DHD DTH drill bits may not be optimal.
Customization options include:
Tip: Customized DHD DTH drill bits often deliver better performance and lower cost per meter in complex conditions.
An experienced manufacturer can help you:
Our drill bits are use:
Kelleg’s DHD DTH bits are designed to be fully compatible with standard DHD hammer connections and popular rig makes.
We ensure:
Choose from a complete range of DHD DTH bit models, including:
Kelleg implements rigorous quality processes:
Kelleg doesn’t just sell bits—we support your drilling success:
Through rigorous quality control at every stage, Kelleg guarantees that our drill bits and other rock drilling tools meet the highest industry standards, delivering exceptional performance, reliability, and durability to our customers.
