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.
Contact us today to get expert advice, competitive pricing, and the right CIR90 drill bit solution for your project.
Compared with general low-pressure DTH bits, CIR90 bits are designed to provide stable drilling performance while keeping operational costs low.
CIR90 bits are engineered to maximize drilling efficiency through optimized face structure, flushing channels, and carbide button distribution.
| 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 |
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.
Explore the full range of CIR90 bit sizes, face designs, and button configurations to match your rock formation and drilling requirements.
| 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 |
| 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 |
CIR90 bits are widely used in general rock drilling operations that rely on low-pressure DTH hammers.
Suitable for groundwater exploration in shallow to medium depth wells.
Suitable for construction foundations, slope anchoring, and infrastructure drilling where a consistent hole diameter is required.
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.
To maximize the service life and drilling efficiency of a CIR90 DTH bit, consider the following operational factors
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These processes help ensure the bit can withstand repeated impact loads in down-the-hole drilling operations.
We provide stable production capacity and fast delivery for CIR90 DTH drill bits.
Available customization options include:
Get reliable CIR90 DTH drill bits tailored to your drilling conditions. Contact us today for technical support, fast delivery, and competitive pricing.
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.
Selecting the correct bit configuration can significantly improve drilling efficiency and reduce operating costs.
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.
