CNC Deep Hole Tungsten Carbide Twist Drill Bit

Description Of CNC Deep Hole Tungsten Carbide Twist Drill Bit

CNC Deep Hole Tungsten Carbide Twist Drill Bit is a precision rotary cutting tool manufactured from ultra-fine grain tungsten carbide (WC) with a metallic cobalt binder through advanced powder metallurgy and HIP (Hot Isostatic Pressing) sintering processes. These drills are specifically designed for deep hole drilling on CNC machining centers, where length-to-diameter ratios typically exceed 5×D and can reach up to 30×D.

Deep hole drilling presents unique challenges: chip evacuation becomes difficult, heat accumulates rapidly, and the drill tends to wander or break due to high length-to-diameter ratios. Conventional high-speed steel (HSS) drills wear quickly and cannot maintain accuracy under these conditions. Tungsten carbide deep hole drills address these challenges through their extreme hardness (HRA 91–94), high rigidity, and internal coolant hole design.

The internal coolant holes (available in single or double configurations) deliver high-pressure coolant directly to the cutting edges, efficiently flushing chips out of the hole and dissipating heat. This ensures stable drilling, improved hole quality, and extended tool life. The 140° point angle provides excellent centering and reduces thrust force, while the 30° helix angle promotes efficient chip evacuation.

CNC deep hole tungsten carbide twist drill bits are available in a wide range of diameters and length-to-diameter ratios to suit different deep hole drilling applications. They are suitable for drilling steel, stainless steel, cast iron, aluminum alloys, titanium alloys, and high-temperature alloys.

Features Of CNC Deep Hole Tungsten Carbide Twist Drill Bit

Ultra-Fine Grain Carbide: Grain size 0.2–0.8 μm provides higher hardness, better edge retention, and improved surface finish.

Extreme Hardness: Hardness of HRA 91–94 enables high-speed drilling in hard materials with excellent wear resistance.

Internal Coolant Holes: Single or double coolant holes deliver high-pressure coolant directly to the cutting edges, ensuring efficient chip evacuation and heat dissipation.

Optimized Geometry: 140° point angle for excellent centering and reduced thrust; 30° helix angle for efficient chip evacuation.

Wide Range of Length-to-Diameter Ratios: Available in 3×D, 5×D, 8×D, 12×D, 15×D, 20×D, 25×D, and 30×D to suit different deep hole depths.

Precision Ground: Tight tolerances ensure accurate hole dimensions, roundness, and surface finish.

Coatings Available: TiAlN, TiCN, and DLC coatings for extended tool life and reduced friction.

100% Virgin Raw Materials: Manufactured from 100% virgin tungsten carbide powder, ensuring consistent quality and superior performance.

HIP Sintering Process: Advanced HIP sintering produces drills with uniform microstructure, minimal porosity, and superior mechanical properties.

Specifications Of CNC Deep Hole Tungsten Carbide Twist Drill Bit