China Solid Carbide Round Blank with Two Weldon Flats, Pre-Ground Cemented Tungsten Carbide Rod Blank for CNC Cutting Tool Manufacturing Manufacturer, Supplier
Product Description
The tungsten solid carbide rods are press-molded via high-precision powder pressing or extrusion molding, sintered in a low-pressure integrated vacuum HIP furnace for superior overall performance.
Supplied as rough tungsten-cobalt carbide round bars or precision-ground bars refined to strict tolerances including h5, h6, and -0.005mm. End-chamfering processing is fully available upon request.
Engineered for cutting general steel, cast iron, stainless steel, heat-resistant steel, nickel-based, and titanium alloys. Ideal for manufacturing twist drills, end mills, taps, and gun drills.
- Premium Composition: Synthesized with high-purity tungsten carbide superfine powder for optimal microstructural density.
- Standardized Sintering: Advanced 10MPa HIP-sinter furnaces ensure uniform densification and eliminate metallurgical voids.
- High Mechanical Properties: Exceptional hardness, excellent transverse rupture strength (TRS), and prominent red hardness at elevated cutting temperatures.
- Comprehensive Durability: Outstanding wear resistance, high modulus of elasticity, chemical stability, impact resistance, low thermal expansion coefficient, and thermal/electrical conductivity comparable to iron.
- Advanced Sinter-HIP Technology: High-vacuum, high-pressure thermal processing reduces porosity, improving compactness and structural reliability across diverse grades and sizes.
| Grade | ISO Grade | Grain Size | Cobalt (Co) | Density | Hardness | TRS | Recommended Applications |
|---|---|---|---|---|---|---|---|
| μm | % | g/cm³ | HRA | N/mm² | |||
| A06 | K05-K10 | 1.0 | 6 | 14.95 | 92.60 | 4000 | Semi-finishing and finishing milling or drilling of materials (HRC48-55) at medium to high speeds, including stainless steel, heat-resistant alloy, die steel, cast iron, 7-series aluminum alloy, and titanium alloy. |
| A06U | K05-K10 | 0.7 | 6 | 14.95 | 93.30 | 4000 | Mills and drills with D ≥ 0.8mm. Suitable for woodworking industry processing. |
| A06UF | K05-K10 | 0.4 | 6 | 14.90 | 93.80 | 4200 | Mills and drills with 0.4mm ≤ D ≤ 1.6mm. Superior microstructure using customized premium powder from H.C.Starck, delivering centralized particle distribution for higher stability and wear resistance. |
| A09N | K10-K20 | 0.2 | 9 | 14.40 | 93.60 | 4500 | Excellent grade for hardened steel below HRC60, non-alloy metals, high-hard plastics, non-alloy steel, fiber composite materials, and titanium. Suited for high-speed cutting tools requiring ultra-high toughness enabled by customized nano-scale WC powder. |
| A10F | K20-K30 | 0.7 | 10 | 14.45 | 91.80 | 4000 | Roughing and semi-finishing milling of heat-treated steel, common alloy steel, cast iron, and materials below HRC45. Fine microstructure from H.C.Starck raw materials provides uniform consistency and wear resistance. |
| A12U | K30-K40 | 0.4 | 12 | 14.25 | 92.30 | 4200 | Roughing and semi-finishing milling of workpiece materials (HRC45-52), including stainless steel, aluminum alloy, alloy steel, and non-ferrous metals. Enhanced edge strength and stability. |
| A12UF | K30-K40 | 0.4 | 12 | 14.14 | 92.80 | 4200 | Powder quality guaranteed by H.C.Starck. Designed for semi-finishing operations on high-hardness steel materials below HRC55. |
| Size (D × L, mm) | Tolerance (mm) | |
|---|---|---|
| Diameter (D) | Length (L) | |
| D(1-3) × 310/330 | +0.30 ~ +0.55 | 0.00 ~ +4.00 |
| D[3-12) × 310/330 | +0.30 ~ +0.60 | 0.00 ~ +4.00 |
| D[12-20) × 310/330 | +0.30 ~ +0.65 | 0.00 ~ +4.00 |
| D[20-40) × 310/330 | +0.30 ~ +0.70 | 0.00 ~ +4.00 |
| Diameter (mm) | Tolerances: Diameter (D) & Length (L) in mm | |
|---|---|---|
| L ≤ 70 mm | 70 < L ≤ 150 mm | |
| D < 5 | D: +0.20 ~ +0.30 | L: +0.20 ~ +1.50 | D: +0.25 ~ +0.35 | L: +0.20 ~ +1.50 |
| 5 ≤ D < 40 | D: +0.25 ~ +0.35 | L: +0.20 ~ +1.50 | D: +0.30 ~ +0.40 | L: +0.20 ~ +1.50 |
Standard outer diameter tolerance ground to h5 / h6 (or custom requirements). Standard length tolerance ranges from 0.00 to +5.00mm.
Outer diameter ground to h5 / h6 tolerance precision. Length tolerance maintained within 0.00 to +2.00mm as standard.
Dedicated micro-grain carbide rods specially engineered for high-precision PCB micro-drills and electronic tooling applications.
Backed by approximately 20 years of production and management experience, integrating state-of-the-art production technology, ultra-precision grinding machinery, and an uncompromising QC management framework.
Utilizing 100% virgin raw materials combined with advanced wet-milling, automated pressing, and vacuum sinter-HIP furnaces to ensure flawless blank integrity.
Strict QC management via our dedicated Quality Control Center, covering metallurgical raw material verification, in-line process checks, and post-machining dimension audits.
Equipped with flat grinders, OD/ID grinders, centerless grinding lines, CNC mills, EDM, and wire-cutting machinery operated by seasoned technicians for strict part concentricity.
Custom-engineered protective plastic tubes and shock-absorbing cartons safeguard precision ground bars during transport via sea freight, air cargo, or global couriers (DHL, FedEx, UPS, TNT).
