666H-D Multi-Flute Carbide End Mill for High Hardness Steel Machining
666H-D
The 666H-D series multi-flute carbide end mill is engineered for high-speed machining of hardened materials. Featuring a proprietary Arti-Co coating, this tool provides exceptional wear resistance and thermal stability, significantly extending tool life in demanding side milling operations. Its specialized geometry ensures superior chip evacuation and delivers a fine surface finish on materials like alloy steel, tool steel, and stainless steel. LV Tool, a leading carbide end mill manufacturer, offers this series for OEM/ODM partners seeking reliable performance and precision in their manufacturing processes.
Advanced Performance for High-Hardness Material Machining
The 666H-D series from LV® Tool is a premium multi-flute carbide end mill specifically engineered for the challenges of machining high-hardness materials. As a leading cutting tool manufacturer with over 29 years of experience, we designed this tool to deliver exceptional performance, precision, and tool life in demanding industrial applications. Its robust construction and advanced features make it the ideal choice for mold and die manufacturing, automotive components, and aerospace parts where precision is paramount.
Key Features & Benefits
- Proprietary Arti-Co Coating: The tool is coated with our advanced Arti-Co surface treatment, providing a superior barrier against heat and abrasion. This results in excellent wear resistance and significantly extends the operational lifespan of the end mill, reducing tool change frequency and machine downtime.
- Optimized for Side Milling: The 666H-D is specifically designed for high-efficiency side milling operations. Its geometry is optimized for high-speed cutting, allowing for increased feed rates while maintaining stability and achieving a fine, high-quality surface finish.
- Multi-Flute Design: The multi-flute configuration (6 to 8 flutes depending on diameter) allows for smoother cutting action and higher material removal rates, enhancing productivity without compromising on the final surface quality.
- Premium Carbide Substrate: Manufactured from premium micro-grain tungsten carbide rods imported from Germany and Japan, ensuring maximum rigidity, heat resistance, and consistent performance from every tool.
Recommended Applications and Materials
This versatile end mill is highly effective for processing a wide range of materials, making it a valuable asset in any machine shop. It is particularly suitable for:
- Alloy Steel & Tool Steel: Ideal for hardened tool steels (e.g., P20, H13, SKD11) used in mold and die making.
- Carbon Steel: Efficiently machines medium to high carbon steels.
- Stainless Steel: Capable of handling the challenges of machining various grades of stainless steel.
- Cast Iron: Provides reliable performance in the milling of cast iron components.
Detailed Specifications
The 666H-D series is available in a wide range of sizes to meet diverse application needs. As a trusted OEM/ODM supplier, we can also provide custom dimensions upon request. Please refer to the table below for standard specifications.
| Model | Diameter (mm) | Flute Length (mm) | Shank Diameter (mm) | No. of Flutes | Overall Length (mm) |
|---|---|---|---|---|---|
| 0204 | 2 | 4 | 4 | 4 | 50 |
| 0304 | 3 | 6 | 6 | 4 | 50 |
| 0404 | 4 | 8 | 6 | 4 | 50 |
| 0506 | 5 | 13 | 6 | 6 | 50 |
| 0606 | 6 | 15 | 6 | 6 | 50 |
| 0806 | 8 | 20 | 8 | 6 | 60 |
| 1006 | 10 | 30 | 10 | 6 | 75 |
| 1206 | 12 | 32 | 12 | 6 | 75 |
| 1606 | 16 | 40 | 16 | 6 | 100 |
| 2008 | 20 | 45 | 20 | 8 | 100 |
| 2508 | 25 | 45 | 25 | 8 | 150 |
| L0606 | 6 | 25 | 6 | 6 | 75 |
| L0806 | 8 | 30 | 8 | 6 | 75 |
| L1006 | 10 | 40 | 10 | 6 | 100 |
| L1206 | 12 | 45 | 12 | 6 | 100 |
| L1606 | 16 | 65 | 16 | 6 | 150 |
| L2008 | 20 | 75 | 20 | 8 | 150 |
| L2508 | 25 | 80 | 25 | 8 | 150 |
666H-D Multi-Flute Carbide End Mill for High Hardness Steel Machining Professional Precision Carbide End Mills and Cutting Tools Manufacturing
LV Tool provides 666H-D Multi-Flute Carbide End Mill for High Hardness Steel Machining for buyers who need dependable precision carbide end mills and cutting tools in professional CNC machining environments. This product supports manufacturers, machine shops, and tooling distributors looking for stable cutting performance, accurate dimensions, and reliable results across demanding materials and production conditions.
Our carbide tools are produced with premium materials, precision CNC grinding, coating expertise, and ISO 9001-certified quality control. This helps customers improve tool life, surface finish, chip evacuation, cutting stability, and machining efficiency in applications such as mold making, automotive parts, aerospace components, electronics, and precision machinery.
As a Taiwan manufacturer with OEM ODM support, LV Tool helps buyers evaluate product fit, standard dimensions, custom tooling needs, and long-term supply requirements. We focus on practical cutting tool solutions that reduce downtime, control cost, and support consistent production quality.

