Tungsten Carbide Drill Bits: Technical Mastery for Industrial Precision | Shanghai Easydrill

Technical Specifications of Tungsten Carbide Drill Bits

1. Material Composition

• Core Structure: Tungsten carbide (WC) particles (85–95%) bonded with cobalt (Co) or nickel (Ni), offering a hardness of 1,500–2,200 HV (Vickers Hardness) .

• Coatings: Advanced coatings like Titanium Nitride (TiN), Titanium Aluminum Nitride (TiAlN), and Diamond-Like Carbon (DLC) enhance wear resistance and reduce friction by up to 45% .

• Grades: Industry-specific grades such as K10 (general-purpose) and K20 (abrasion-resistant) cater to diverse materials, from aluminum to hardened steels .

2. Design Innovations

• Flute Geometry: Spiral flutes with polished surfaces ensure efficient chip evacuation, critical for deep-hole drilling (up to 10× diameter) in stainless steel and titanium .

• Point Angles: Split-point designs (135°–140°) minimize walking and improve accuracy in CNC machining .

• Coolant Channels: Internal coolant systems reduce heat buildup, extending tool life during high-speed operations (up to 250 m/min) .

3. Performance Metrics

• Cutting Speeds:

• Stainless Steel: 70–120 m/min

• Aluminum: 200–300 m/min

• Cast Iron: 80–150 m/min

• Tolerances: Precision-ground tips achieve hole tolerances of ±0.01 mm for critical aerospace components .

Key Applications Across Industries

1. Aerospace

• Drilling turbine blades, engine housings, and composite materials requiring burr-free finishes and tight tolerances.

• Example: Tools with TiAlN coatings withstand temperatures up to 900°C in Inconel alloys .

2. Automotive

• High-volume production of engine blocks, transmission gears, and brake systems.

• Innovation: Multi-material bits drill through layered composites (steel + aluminum) without tool changes .

3. Oil & Gas

• Deep-hole drilling in pipelines and valve components, often in abrasive or corrosive environments.

• Specialized Tools: Ultra-long drills (20× diameter) with through-coolant systems .

4. Electronics

• Micro-drilling (0.1–3 mm diameter) for circuit boards and semiconductor components, ensuring minimal thermal distortion.

Advantages of Tungsten Carbide Drill Bits

1. Exceptional Hardness

• 3× harder than HSS, enabling machining of hardened steels (up to 60 HRC) and exotic alloys .

2. Heat and Wear Resistance

• Maintains integrity at 1,000°C, outperforming cobalt and HSS in high-speed applications .

• Coatings like DLC extend tool life by 400% in abrasive materials .

3. Cost Efficiency

• Reduced downtime and longer lifespan lower per-hole costs, ideal for large-scale production.

4. Versatility

• Suitable for ISO material groups:

• P (Steel)

• M (Stainless Steel)

• K (Cast Iron)

• N (Non-Ferrous Metals)

5. Superior Surface Finish

• Precision-ground edges and optimized geometries eliminate secondary finishing steps.