4 Flutes Corner Radius End Mill

Engineered for Hardened & Heat-Treated Steels up to 65HRC
Crafted from ultra-fine grain carbide and coated with a high red-hardness nano-layer (e.g., HH), this tool is optimized for stable, long-life cutting in high-HRC steels such as SKD11, D2, and H13. Excellent wear resistance and thermal stability make it ideal for mold bases, die inserts, and high-precision components.

4-Flute Geometry for High Metal Removal Rates and Surface Finish Quality
The 4-flute configuration allows for higher feed rates and more contact points per rotation, improving cutting efficiency while maintaining excellent surface finishes. Ideal for semi-finishing and finishing hardened steel with medium-to-light depths of cut.

Corner Radius Design Enhances Edge Strength and Extends Tool Life
Compared to sharp-end mills, the corner radius distributes cutting forces more evenly and reduces edge chipping. This significantly improves durability and supports consistent performance in demanding conditions—especially in interrupted or complex contour milling.

Rigid Core Geometry for Stable Machining with Minimal Deflection
Designed with a thicker core and short flute length, the tool maintains high rigidity and anti-vibration characteristics, allowing for stable, precise machining even in tight-tolerance molds and deep cavity finishing.

Heat-Resistant Coating Supports High-Speed, Dry, or MQL Machining
The coating resists oxidation and softening at high temperatures, enabling high-speed cutting in dry or near-dry environments. This supports sustainable machining practices and lowers coolant-related costs without compromising tool performance.

Application-Specific Cutting Parameters Provided – Maximize Efficiency with Confidence
Each Samho end mill includes recommended cutting speeds, feed rates, and depth-of-cut parameters tailored for 65HRC steel. This helps users minimize setup time, reduce trial-and-error, and achieve stable, repeatable performance across batches.