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DHD350A Shank DTH Drill Bits from YKDrill are engineered for heavy-duty drilling in medium to hard rock formations. Available in convex, flat, and concave face designs, these bits combine spherical and ballistic carbide buttons to achieve faster penetration, superior wear resistance, and extended service life.
With diameters ranging from 140mm to 178mm, the DHD350A series is widely applied in mining, quarrying, water well drilling, geothermal energy, and civil engineering projects.
| Head Shape | Head Diameter (mm) | Shank Length (mm) | Spline | Port Holes | Button Type | Gauge Buttons | Front Buttons | Weight (Kg) |
|---|---|---|---|---|---|---|---|---|
| Convex Face | 140 | 260 | 8 | 2 | Spherical + Ballistic | 7 × Ø18mm | 4 × Ø15mm + 3 × Ø14mm | 15.8 |
| Flat Face | 146 | 260 | 8 | 2 | Spherical + Ballistic | 8 × Ø18mm | 8 × Ø14mm | 16.5 |
| Flat Face | 152 | 260 | 8 | 2 | Spherical + Ballistic | 8 × Ø18mm | 8 × Ø14mm | 17 |
| Concave Face | 165 | 260 | 8 | 2 | Spherical | 8 × Ø18mm | 4 × Ø16mm + 4 × Ø14mm | 18.9 |
| Concave Face | 178 | 260 | 8 | 2 | Spherical | 8 × Ø18mm | 6 × Ø16mm + 5 × Ø14mm | 20.4 |
✅ DHD350A Shank – Compatible with most DHD350A series hammers
✅ Convex Face Design – Optimized for fast penetration in hard rock
✅ Spherical + Ballistic Buttons – Balance between durability and cutting speed
✅ Dual Air Flushing Ports – Ensures better cleaning and cooling efficiency
✅ High-Strength Alloy Steel – Heat-treated for extended service life
✅ Precision Machining – Improves energy transfer and borehole straightness
⛏️ Mining & Quarrying – Blast holes and bench drilling
💧 Water Well Drilling – Reliable in small-to-medium borehole drilling
🌡️ Geothermal Energy – Adapted for hot, abrasive conditions
🏗️ Civil Construction – Foundation piling and ground reinforcement
📦 Packaging: Wooden case or steel rack
📌 MOQ: 2 pieces
⏱️ Lead Time: 5–10 working days
🚢 Shipping: By sea, air, or express
🏭 Direct Manufacturer – 15+ years in DTH drilling tools
📐 Customization – Face type, button shape, flushing holes available
🔍 Strict QC – 100% inspection before delivery
🌍 Global Supply – Exported to 40+ countries
💬 Fast Support – Quick technical and after-sales assistance
Looking for durable and high-performance DHD350A DTH drill bits? Contact YKDrill today for competitive pricing and reliable supply.
💼 Company: YKDrill
📧 Email: ykdrill@ykdrill.com
🌐 Website: www.ykdrill.com
