Contact Platform Support
Help CenterTungsten Carbide Drill Bits
Product Spotlights
Related Products
Tungsten Carbide Drill Bits
Tungsten carbide drill bits are mainly made of tungsten carbide (WC) with cobalt (Co) as binder via powder metallurgy process. They feature ultra-high hardness, excellent wear resistance and heat resistance, ideal for drilling hard materials and machining high-precision holes, widely used in CNC machining, mold manufacturing, auto parts, aerospace and other industries.
1. Core Performance (vs HSS Drill Bits)
Hardness: HRA 90–93 (equivalent to HRC 78–82), capable of drilling hardened steel up to HRC 60+
Service Life: 5–10 times longer than HSS bits, cost-effective for mass production
Heat Resistance: Maintain cutting performance at 800–1000℃, suitable for high-speed machining
Precision: High rigidity with low runout, ensuring high hole accuracy and smooth finish, mostly no secondary finishing needed
Drawbacks: High brittleness, vulnerable to impact; strict requirements on machine tools and clamping; higher cost, professional grinding equipment required for resharpening
2. Main Types & Features
Solid Tungsten Carbide Drill Bits (Most Popular)
Integrally made of carbide with fine-grain material and TiAlN coating.Advantages: supreme rigidity, good self-centering, high precision and smooth chip removal, fit for deep hole and precision machining.Application: CNC machining centers, high-speed machine tools; carbon steel, stainless steel, hardened steel, cast iron, etc.
Brazed Carbide Drill Bits
Steel body welded with carbide cutting head, balancing toughness and hardness.Advantages: lower cost than solid carbide bits, good rigidity, optional internal cooling.Application: medium-load stable cutting; steel, cast iron and non-ferrous metals.
Replaceable Head Drill Bits
Steel drill body with interchangeable carbide heads for repeated use of shank.Advantages: low long-term cost, quick head replacement, precision close to brazed type.Application: large-batch fixed-diameter drilling; CNC machining centers and lathes.
Indexable Insert Drill Bits
Steel holder fitted with indexable carbide inserts, directly replace worn inserts.Advantages: economical, fast tool change, wide applicable aperture range (2D–5D).Application: lathes and general machine tools; rough machining of mild steel, cast iron and aluminum.
3. Key Parameters & Selection Guide
Point Angle: Standard 118° for general use; 135° for stainless steel & hard materials for better centering
Helix Angle: 30°–35° for common steel; 40°–45° for aluminum & copper for better chip removal; 15°–20° for hard materials to enhance rigidity
Coatings: TiN (golden, wear-resistant); TiAlN (purple-black, heat-resistant, preferred choice); AlTiN (super-hard, high temperature resistance)
Cooling Mode: Internal cooling is preferred to deliver coolant directly to cutting area and prevent edge chipping; sufficient external coolant flow is necessary if internal cooling is unavailable
Clamping Requirement: Total runout ≤0.02mm, ≤0.01mm for small diameter bits; hydraulic or heat-shrink tool holders are recommended
4. Applicable Materials & Machining Scope
✅ Recommended materials: carbon steel, alloy steel, mold steel, hardened steel (HRC 50–68), stainless steel, cast iron, ductile iron, aluminum alloy, titanium alloy❌ Not recommended: pure copper (easy to cause built-up edge), soft wood, plastic (easy thermal melting), working conditions with severe impact load such as hand-held electric hammers
5. Operation Tips (Prevent Edge Chipping & Extend Service Life)
Adopt high-rigidity machine tools and high rotating speed (≥8000rpm), avoid outdated equipment
Speed & feed rate: low speed & medium feed for hard/hardened steel; high speed & large feed for aluminum and mild steel
Keep flute unobstructed for smooth chip removal; retract drill bit to remove chips when drilling holes deeper than 3 times diameter
Resharpen worn bits with professional tools instead of manual grinding to avoid edge damage
6. Performance Comparison Chart
| Properties | Tungsten Carbide Drill Bit | HSS Drill Bit |
|---|---|---|
| Hardness | HRA 90–93 | HRC 62–68 |
| Service Life | Long | Short |
| Applicable Speed | High (8000–30000rpm) | Low (≤3000rpm) |
| Price | Higher | Economical |
| Toughness | Poor, impact-sensitive | Good |
7. Common Specifications
Diameter: 1–20mm (common size), max up to 50mm
Shank Type: straight shank (≤12mm), taper shank (≥12mm), internal cooling shank
Length: standard length (3D–5D), extended length (8D–15D for deep holes), short length (1.5D for high rigidity)
Send Inquiry to This Supplier
You May Also Like
-
TCT Saw BladeUS$ 5 - 50MOQ: 1 Piece -
Tungsten Carbide Saw TipsUS$ 0.1 - 1MOQ: 1 Piece
-
End Mills With Coating Nano-blueUS$ 2 - 20MOQ: 1 Piece
-
Tungsten Carbide Turning Insert/PCD/PCBN Cutting Tools/CNC InsertsUS$ 1 - 50MOQ: 10 Pieces
-
End Mills With 6 FluteUS$ 1 - 50MOQ: 1 Piece
-
Tungsten Carbide RodsUS$ 1 - 50MOQ: 1 Piece
-
Tungsten Carbide Rotary BurrsUS$ 1 - 50MOQ: 1 Piece
-
MFV Vertical Angled Anti-Vibration Tool HolderUS$ 5 - 50MOQ: 1 Piece
-
Cemented Carbide Brazed TipUS$ 1 - 10MOQ: 1 Piece
-
Saw Blade TipUS$ 0.1 - 1MOQ: 1 Piece