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YKDrill SD Shank DTH Bits in 203mm–305mm range are specially engineered for large-diameter, deep-hole drilling in hard and abrasive rock formations. Featuring concave and convex-concave face designs and spherical tungsten carbide buttons, these drill bits provide superior wear resistance, borehole control, and impact energy transfer in high-pressure drilling conditions.
Ideal for mining blast holes, water well drilling, piling, geothermal wells, and deep civil construction.
| Head Shape | Head Diameter (mm) | Shank Length (mm) | Spline | Port Holes | Button Type | Gauge Buttons | Front Buttons | Weight (Kg) |
|---|---|---|---|---|---|---|---|---|
| Concave Face | 203 | 321 | 8 | 2 | Spherical | 10 × Ø18mm | 4 × Ø18mm + 10 × Ø16mm | 41.3 |
| Concave Face | 216 | 321 | 8 | 2 | Spherical | 10 × Ø18mm | 4 × Ø18mm + 10 × Ø16mm | 45.0 |
| Concave Face | 230 | 321 | 8 | 2 | Spherical | 12 × Ø18mm | 12 × Ø18mm + 6 × Ø16mm | 47.8 |
| Concave Face | 235 | 321 | 8 | 2 | Spherical | 12 × Ø18mm | 12 × Ø18mm + 6 × Ø16mm | 48.4 |
| Concave Face | 254 | 321 | 8 | 2 | Spherical | 12 × Ø18mm | 12 × Ø18mm + 8 × Ø16mm | 55.3 |
| Convex-Concave Face | 275 | 321 | 8 | 2 | Spherical | 12 × Ø18mm | 27 × Ø16mm | 62.0 |
| Convex-Concave Face | 305 | 321 | 8 | 3 | Spherical | 15 × Ø18mm | 35 × Ø16mm | 70.5 |
✅ Large Diameter Range – From Ø203mm up to Ø305mm
✅ SD Shank – Compatible with SD-class high-pressure DTH hammers
✅ Spherical Buttons – Maximum durability and stability in fractured rock
✅ Concave / Convex-Concave Face Design – Better borehole guidance and rock breaking balance
✅ Heavy-Duty Structure – Thick steel body with heat treatment for harsh conditions
✅ Enhanced Flushing System – Up to 3 air holes for clean and efficient drilling
⛏️ Mining Industry – Large blast holes and production drilling
💧 Water Wells & Boreholes – Deep well drilling in hard formations
🏗️ Foundation Piling – Construction of bridges, highways, and industrial bases
🌡️ Geothermal Energy – High-depth geothermal well drilling
🌍 Infrastructure Projects – Subway, tunnels, dams, slope reinforcement
Packaging: Strong wooden crates
Lead Time: 5–15 working days based on quantity
MOQ: 1–2 pieces depending on diameter
Shipping: Sea, air, or express (UPS/FedEx/DHL)
🏭 15+ Years Manufacturer – Professional focus on DTH drill bits
🧪 ISO & CE Certified – High quality, stable performance
🎯 Customizable Design – Face style, button shape, flushing pattern
🌍 Global Customers – Trusted in 40+ countries worldwide
🔧 After-Sales Support – Fast response team for technical guidance
Looking for large-diameter DTH drill bits with reliable strength and efficiency? Talk to our team for technical support and best price now!
💼 Company: YKDrill
📧 Email: ykdrill@ykdrill.com
🌐 Website: www.ykdrill.com
