1. Designed for CIR90 DTH hammer systems
2. Suitable for 90–130 mm drilling diameter
3. Reliable performance in granite, basalt, and limestone
4. Multiple button configurations for different rock conditions
The CIR90 DTH drill bit is designed for low-pressure down-the-hole drilling systems, providing stable penetration and reliable performance in medium to hard rock formations.
Compatible with CIR90 DTH hammers, it is widely used for quarry blasting, foundation drilling, water well drilling, and small-diameter mining holes.
Engineered with high-strength alloy steel and optimized button layouts, CIR90 bits deliver long service life, consistent hole quality, and cost-efficient drilling performance.
Request Technical Details for CIR90 DTH Bit
Contact us today to get expert advice, competitive pricing, and the right CIR90 drill bit solution for your project.
What Makes CIR90 DTH Bits Different
Compared with general low-pressure DTH bits, CIR90 bits are designed to provide stable drilling performance while keeping operational costs low.
CIR90 Bit Design & Structure
CIR90 bits are engineered to maximize drilling efficiency through optimized face structure, flushing channels, and carbide button distribution.
Main Structural Components
- Skirt body
- Tungsten carbide buttons
- Air flushing channels
- Shank connection interface
- Wear protective surfaces
Available Face Designs
| Face Type | Best Application |
| Flat Face | Hard rock, stable formations |
| Concave Face | Medium to hard rock drilling |
| Convex Face | Faster penetration in medium formations |
| Drop Center | Improved hole stability |
| Deep Concave | Deep hole drilling stability |
Need Help Choosing the Right CIR90 Bit Design?
Not sure which face design or button configuration fits your drilling conditions? Share your rock type and project details, and our experts will recommend the optimal CIR90 bit setup for maximum performance.
CIR90 Available Sizes & Specifications
Explore the full range of CIR90 bit sizes, face designs, and button configurations to match your rock formation and drilling requirements.
Available CIR90 Size Ranges
| Nominal diameter (mm) | Side teeth | Middle teeth | Connection with DTH Hammer | Weight (kg) | Specification |
| φ90 | 6×φ14 | 4xφ12 | CIR90 | 3.6 | KQZ90P |
| φ100 | 6×φ14 | 4xφ12 | CIR90 | 4.0 | KQZ100T |
| φ105 | 8×φ14 | 2xφ12 | CIR90 | 4.2 | KQZ105T |
General Technical Specifications
| Parameter | Specification |
| Bit Type | Low-pressure DTH bit |
| Shank Type | CIR90 |
| Hole Diameter Range | 90 mm – 130 mm |
| 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 |
| Rock Hardness | Medium to Hard Rock |
| Recommended Air Pressure | 0.5 – 1.3MPa |
Typical Applications of CIR90 DTH Bits
CIR90 bits are widely used in general rock drilling operations that rely on low-pressure DTH hammers.
Water Well Drilling
Suitable for groundwater exploration in shallow to medium depth wells.
Foundation & Anchoring Projects
Suitable for construction foundations, slope anchoring, and infrastructure drilling where a consistent hole diameter is required.
Find the Right CIR90 Bit for Your Application
Different drilling applications require different bit configurations. Tell us your project type, hole size, and formation, and we’ll help you select the most suitable CIR90 DTH drill bit.
How to Select the Right CIR90 Bit？
To maximize the service life and drilling efficiency of a CIR90 DTH bit, consider the following operational factors
Rock Formation
Medium rock → Concave face
Hard rock → Flat face
Hole Diameter Requirement
Compressor Capacity
Button Shape Selection
Ballistic buttons are designed for use in medium formations.
Parabolic buttons offer balanced performance across a variety of rock conditions.
Manufacturing & Quality Control
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Quality Control Highlights
- High-strength alloy steel forging
- Precision CNC machining
- High-temperature heat treatment
- Carbide buttonquality inspection
- Strict dimensional tolerance control
- Bit hardness and fatigue testing
- Final dimensional inspection before shipment
These processes help ensure the bit can withstand repeated impact loads in down-the-hole drilling operations.
Reliable Supply for Global Drilling Projects
We provide stable production capacity and fast delivery for CIR90 DTH drill bits.
Available customization options include:
- Custom button layouts
- Special face designs
- Bit diameter adjustments
- Private label manufacturing
Ready to Improve Your Drilling Performance?
Get reliable CIR90 DTH drill bits tailored to your drilling conditions. Contact us today for technical support, fast delivery, and competitive pricing.
Frequently Asked Questions About CIR90 DTH Drill Bits
Find answers to the most common inquiries about hole diameter, rock compatibility, air pressure requirements, and bit selection. Our FAQ helps you choose the right CIR90 bit quickly and ensures efficient, cost-effective drilling. Don’t see your question? Contact our experts for personalized advice and recommendations.
A CIR90 DTH drill bit is a low-pressure down-the-hole drill bit designed to work with a CIR90 hammer, typically used for hole diameters between 90 mm and 130 mm.
CIR90 bits can drill granite, basalt, limestone, marble, and other medium-to-hard rock formations.
CIR90 hammers usually operate with 0.5–1.3 MPa air pressure, depending on the compressor capacity and drilling conditions.
CIR bits are designed for low-pressure compressors, while high-pressure bits such as DHD or COP series require higher air pressure but offer faster penetration in deep drilling operations.
The service life depends on rock hardness, drilling parameters, and button type, but high-quality CIR90 bits typically provide long drilling life and stable wear resistance.
Need Help Selecting the Right CIR90 Bit?
Selecting the correct bit configuration can significantly improve drilling efficiency and reduce operating costs.
Provide us with the following information:
- DTHhammer model
- Required hole diameter
- Rock formation
- Compressor pressure and air volume
Our technical team will recommend the most suitable CIR90 DTH drill bit configuration for your drilling project.
Send us your requirements through the contact form to receive expert advice and a quotation.
