CIR Series DTH drill bits are designed for reliable performance in low-pressure down-the-hole drilling systems. Compatible with CIR hammers, these bits deliver efficient rock penetration, stable hole quality, and long service life in water well drilling, mining exploration, quarrying, and construction applications. With optimized button layout and durable materials, CIR bits help improve drilling productivity while reducing operational costs.
Overview & Core Advantages
CIR Series DTH drill bits are low-air-pressure down-the-hole drilling tools designed to work with CIR series DTH hammers. They are widely used for drilling holes with diameters ranging from 50 mm to 200 mm, delivering stable drilling performance in soft to medium-hard rock formations.
These low-pressure DTH bits transfer impact energy directly from the hammer to the rock surface, enabling efficient rock fragmentation and consistent hole quality.
CIR shank systems are widely used in regional markets and smaller drilling rigs. Compared with high-pressure DTH systems, CIR bits feature a simpler and more cost-efficient design, while still delivering reliable performance within their intended pressure range.
Typical drilling applications include blast hole drilling, quarrying, anchoring, infrastructure construction, geothermal drilling, and water well drilling.
Key Features & Core Advantages
High Drilling Efficiency
Optimized carbide button layout improves rock fragmentation and penetration rates in soft to medium-hard formations.
Extended Service Life
Improved steel grade with advanced heat treatment enhances fatigue resistance and increases the operational lifespan of the drill bit.
Stable Hole Quality
Balanced bit design helps maintain hole straightness and reduces deviation during drilling.
Cost-Effective Drilling Solution
Designed for low-pressure drilling systems, CIR DTH bits reduce compressor requirements and overall drilling costs.
More Parameters
| CIR Series | Nominal Dia. (mm) |
Side Teeth QTY*Dia. |
Middle Teeth QTY*Dia. |
Connection with DTH Hammer |
Weight (kg) |
Specification |
 |
φ50 | 3×φ10 | 2xφ10 | CIR50 | 1 | KQZ50P |
| φ65 | 4×φ12 | 3xφ12 | CIR60/CIR65 | 1.5 | KQZ65P | |
| φ76 | 5×φ12 | 3xφ12 | CIR70 | 2.5 | KQZ76P | |
| φ80 | 6×φ12 | 3xφ12 | CIR70 | 3 | KQZ80P | |
| φ90 | 6×φ14 | 4xφ12 | CIR90 | 3.6 | KQZ90P | |
| φ100 | 6×φ14 | 4xφ12 | CIR90 | 4 | KQZ100T | |
| φ105 | 8×φ14 | 2xφ12 | CIR90 | 4.2 | KQZ105T | |
| φ110 | 6×φ14 | 5xφ12 | CIR110 | 6.1 | KQZ110P | |
| φ115 | 6×φ14 | 5xφ12 | CIR110 | 6.3 | KQZ115P | |
| φ120 | 6×φ14 | 6xφ12 | CIR110 | 7 | KQZ120P | |
| φ125 | 6×φ14 | 7xφ12 | CIR110 | 7.1 | KQZ125P | |
| φ130 | 6×φ14 | 7xφ12 | CIR110 | 7.3 | KQZ130P | |
| φ130 | 8×φ14 | 3xφ12 | CIR110 | 6.8 | KQZ130T | |
| φ135 | 6×φ14 | 7xφ12 | CIR110 | 8 | KQZ135P | |
| φ140 | 6×φ14 | 8xφ12 | CIR110 | 8.2 | KQZ140P | |
| φ150 | 6×4φ14 | 9xφ12 | CIR110 | 9 | KQZ150P | |
| φ155 | 14×φ16 | 4xφ14 | CIR130 | 16.3 | KQZ155P | |
| φ165 | 14×φ16 | 5xφ14 | CIR130 | 17.3 | KQZ165P | |
| φ180 | 15×φ16 | 8xφ14 | CIR130 | 19.6 | KQZ180P | |
| φ200 | 18×φ16 | 3xφ14 | CIR130 | 23 | KQZ200P | |
| φ175 | 15×φ16 | 8xφ14 | CIR150 | 22.8 | KQZ175P | |
| φ185 | 15×φ16 | 8xφ14 | CIR150 | 23.2 | KQZ185P | |
| φ190 | 9×φ16 | 13xφ14 | CIR150 | 23.5 | KQZ190P | |
| φ195 | 9×φ16 | 13xφ14 | CIR150 | 24 | KQZ195P | |
| φ200 | 18×φ16 | 5xφ14 | CIR150 | 25.8 | KQZ200P |
|
Specification Item |
Details |
|
Bit Diameter Range |
50mm –200 mm |
|
Face Types |
Flat Face, Concave Face, Convex Face |
|
Button Types |
Spherical (Domed), Ballistic, Semi-Ballistic |
|
Flushing Holes |
Optimized flushing hole design for efficient cuttings removal |
|
Carbide Button Material |
High-grade tungsten carbide inserts |
|
Bit Body Material |
Premium alloy steel |
|
Heat Treatment |
Advanced heat treatment for enhanced wear resistance and fatigue strength |
We provide customized CIR DTH drill bits based on project requirements, including:
- Bit diameter
- Button configuration
- Face design
- Rock formation conditions
- Drilling depth requirements
OEM manufacturing and custom branding services are available.
Can't find the parameters you want? Please get in touch with us!
Download BrochureApplications & Selection Guide
Applications
CIR Series DTH bits are widely used across multiple drilling industries.✔ Blast Hole Drilling
Efficient drilling for mining and quarry blasting operations.
✔ Quarrying Operations
Reliable performance in limestone, marble, and basalt quarry drilling.
✔ Water Well Drilling
Suitable for groundwater exploration in soft to medium formations.
✔ Infrastructure & Foundation Construction
Used for anchoring holes, foundation drilling, and geotechnical projects.
✔ Geothermal Drilling
Applicable in geothermal hole drilling requiring stable and reliable penetration.
How to Select the Right CIR DTH Bit
Confirm Hammer Compatibility
Ensure the drill bit matches your CIR hammer model (such as CIR90, CIR100, or CIR110).
2.Choose the Right Button Type
- Spherical buttons – suitable for hard and abrasive rock formations
- Ballistic buttons – suitable for soft to medium formations with faster penetration
3.Select the Appropriate Face Design
CIR drill bits are available in three basic face designs, allowing adaptation to different geological conditions.
- Flat face – for hard rock drilling
- Concave face – improved hole straightness
- Convex face – higher penetration in softer rock formations
4.Match Air Pressure & Compressor Capacity
Ensure the drilling rig provides sufficient air pressure and air volume to maintain efficient hammer performance and proper cuttings removal.
Quality Assurance
Our Manufacturing Advantages
- Improved steel grade for better fatigue resistance
- Advanced CNC machining for precise manufacturing
- Professional heat treatment process for durability
- Strict raw material inspection and quality control
- Full product inspection before shipment
- Stable large-scale production capacity
Reliable Performance for Global Drilling Projects
Our CIR Series DTH drill bits are used by customers in mining, quarrying, water well drilling, and construction projects worldwide. Each drill bit is designed to deliver stable performance, long service life, and efficient drilling productivity across various geological conditions.
Get Expert Support for Your Drilling Project
Tell us your drilling requirements, including:
- Hammer model
- Hole diameter
- Rock formation type
- Air pressure and compressor specifications
Our technical experts will recommend the most suitable CIR Series DTH drill bit for your drilling project.
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