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YKDrill QL50 Series DTH Drill Bits are specially engineered for medium-to-large diameter drilling in hard, abrasive formations. Compatible with standard QL50 hammers, these bits offer various face configurations (Convex, Flat, Concave) to optimize performance for different ground conditions.
Equipped with Domed and Ballistic Tungsten Carbide Buttons, and featuring a rugged heat-treated alloy steel body, these drill bits deliver high penetration rates, long service life, and excellent hole straightness under high air pressure drilling.
| Head Shape | Head Diameter (mm) | Shank Length (mm) | Spline | Port Holes | Button Type | Gauge Buttons | Front Buttons | Weight (Kg) |
|---|---|---|---|---|---|---|---|---|
| Convex Face | 140 | 240 | 12 | 2 | Domed + Ballistic | 7 × Ø18mm | 4 × Ø15mm + 3 × Ø14mm | 15.3 |
| Flat Face | 146 | 240 | 12 | 2 | Domed + Ballistic | 8 × Ø18mm | 8 × Ø14mm | 16.0 |
| Flat Face | 152 | 240 | 12 | 2 | Domed + Ballistic | 8 × Ø18mm | 8 × Ø14mm | 16.5 |
| Concave Face | 165 | 240 | 12 | 2 | Domed | 8 × Ø18mm | 4 × Ø16mm + 4 × Ø14mm | 18.5 |
| Concave Face | 178 | 240 | 12 | 2 | Domed | 8 × Ø18mm | 6 × Ø16mm + 5 × Ø14mm | 20.0 |
✅ Standard QL50 Shank – Compatible with 5'' high-pressure DTH hammers
✅ Various Face Types – Convex for fast penetration, Flat for balance, Concave for borehole control
✅ Domed & Ballistic Buttons – Excellent for fractured and abrasive rock formations
✅ Heat Treated Alloy Steel – Durable and resistant to deformation
✅ Efficient Air Flushing Design – Dual ports for cooling and cuttings removal
✅ Balanced Button Layout – Stable performance and better hole quality
⛏️ Mining – Bench blasting, production drilling
💧 Water Well Drilling – Medium to deep boreholes
🌡️ Geothermal Projects – Energy well drilling in hard ground
🏗️ Construction & Infrastructure – Foundation piling, ground anchoring
🌍 Exploration – Geological and resource exploration
Packaging: Steel frame or wooden case
Lead Time: 5–10 working days
MOQ: 2 pieces
Shipping Options: By sea, air, or international express (DHL/FedEx)
🏭 Experienced Manufacturer – Over 15 years in DTH drilling tools
🔧 OEM/ODM Support – Button type, face design, flushing can be customized
✅ Strict QC – 100% tested before shipment
🌐 Global Customers – Exported to 40+ countries
💬 Responsive Service – Technical support and fast communication
Need QL50 high-performance DTH bits? Contact YKDrill for reliable supply and competitive pricing!
💼 Company: YKDrill
📧 Email: ykdrill@ykdrill.com
🌐 Website: www.ykdrill.com
