CIR DTH bits (Down-the-Hole drill bits) are specially designed for low-pressure drilling applications. They are widely used in mining, quarrying, water well drilling, and construction projects. Manufactured from premium alloy steel and fitted with high-quality tungsten carbide buttons, CIR DTH bits deliver fast penetration rates, low air consumption, and long service life.
We offers a full range of CIR DTH bits from CIR65 to CIR170, suitable for drilling hard, medium-hard, and soft rock formations.
Key Features
High Efficiency – Optimized internal structure ensures maximum energy transfer and faster drilling speed.
Low Air Consumption – Designed for low-pressure compressors, reducing operation cost.
Durable Materials – Made from superior alloy steel with advanced heat treatment for strength and wear resistance.
Long Service Life – High-grade tungsten carbide buttons resist wear and impact for extended bit life.
Easy Maintenance – Simple structure, easy to disassemble and replace, low failure rate.
Versatile Applications – Suitable for drilling blast holes, anchor holes, foundation projects, and water wells.
CIR DTH Bit Specifications
Model | Head Shape | Diameter (mm) | Shank Length (mm) | Spline | Air Holes | Button Type | Gauge Buttons | Weight (kg) |
CIR65 | Flat Face | 65 / 68 | 105 | 4 | 2 | Spherical | 4 × Ø12 | 1.5–1.6 |
CIR70 | Flat/Convex | 76 / 85 | 111 | 4 | 2 | Spherical | 6 × Ø12 / Ø13 | 2.0–2.3 |
CIR90 | Convex/Concave | 90/110 | 130 | 6 | 2 | Spherical / Ballistic | 6 × Ø14 | 3.75–4.8 |
CIR110 | Concave/Flat Face | 110 / 140 | 140 | 6 | 2 | Ballistic | 6 × Ø14 / 8 × Ø14 | 6.2–8.05 |
CIR150 | Convex | 155 / 178 | 170 | 6 | 3 | Ballistic | 9 × Ø16 | 16.7–17.55 |
CIR170 | Convex | 195 / 203 | 170 | 6 | 3 | Ballistic | 9 × Ø16 | 18.85–26.35 |
Key Notes
Head Shape: Flat / Convex / Concave designs available to match different rock formations.
Button Type: Spherical buttons for higher wear resistance; Ballistic buttons for faster penetration.
Air Holes: 2–3 holes designed to optimize air flow and improve chip removal.
Customization: Special sizes, button shapes, and face designs available upon request.
Recommended Applications
CIR65–CIR90 → Shallow blast holes, quarrying, anchoring.
CIR110–CIR140 → Water well drilling, tunneling, medium-depth construction projects.
CIR150–CIR170 → Large boreholes, foundation projects, deep mining.
Applications
Mining & Quarrying – Blast holes, production drilling.
Construction Projects – Anchor holes, foundation piles, slope stabilization.
Water Well Drilling – Shallow to medium depth boreholes.
Geothermal & Infrastructure – Tunnels, roads, and other engineering projects.
