The 5D Ultra-Hard Internal Cooling Tungsten Carbide Drill Bit (Size Range: 8.1–10.0mm, D10 Shank, 61mm flute length, 103mm overall length) is specially engineered for high-performance, high-efficiency deep-hole drilling in tough materials. Featuring a 60° center outlet and unique "fried dough twists" spiral flute geometry, this drill ensures fast chip evacuation, excellent centering, and minimal tool wear even in demanding conditions.

Crafted from ultra-fine grain tungsten carbide and enhanced with internal coolant channels, this drill delivers superior hardness, thermal resistance, and prolonged cutting life — ideal for automated CNC machining centers and precision metal drilling applications.

Key Features

• Ultra-Hard Tungsten Carbide: Offers exceptional hardness and wear resistance for long tool life.

• Internal Coolant Design: Dual internal channels for efficient cooling, reducing heat buildup and tool wear.

• Fried Dough Twists Helix Flute: Innovative twisted flute design enhances chip evacuation and minimizes clogging.

• 60° Center Outlet Tip: Promotes accurate centering and reduced deflection in deep-hole drilling.

• 5D Depth Ratio: Capable of drilling to 5 times the diameter, ideal for deeper hole applications.

• Precision Ground Shank (D10): Ensures optimal alignment and vibration reduction during high-speed operation.

Applications

• Automotive Industry: Precision drilling of hardened steel components and engine blocks.

• Mold & Die Manufacturing: High-accuracy hole making in alloyed tool steels.

• Aerospace Components: Drilling structural parts with strict tolerance requirements.

• CNC Machining Centers: Continuous, automated high-speed drilling with reliable tool life.

• General Engineering: Deep-hole drilling in stainless steel, carbon steel, and composite alloys.