4 Flutes Long Neck Flat End Mill

Purpose-Built for Hardened and Heat-Treated Steels up to 65HRC

Constructed from ultra-fine grain carbide and coated with high red-hardness nano-layer (e.g., HH), this end mill is specifically designed for efficient machining of materials like SKD11, H13, and D2. Offers outstanding wear resistance and tool life during prolonged use in mold and die steel applications.

4-Flute Geometry for Higher Feed Rates and Superior Surface Finish

With four cutting edges, the tool allows higher feed speeds and better chip load distribution, reducing cutting force and vibration. Especially suitable for semi-finishing and finishing operations in high-HRC steels, delivering excellent dimensional accuracy and smooth surface quality.

Long Neck Design Enables Deep Feature Access with Rigidity Retained

The extended neck configuration allows access to deep cavities, narrow grooves, and internal walls while minimizing tool deflection. Ideal for machining thin-wall sections, deep core areas, and mold features that require extended reach and precision.

Flat End Geometry Ensures Accurate 90° Shoulders and Flat Bottom Surfaces

The square-end profile ensures clean, sharp corners and flat-bottomed slots or pockets—making it ideal for step finishing, shoulder milling, and structural feature definition in hard materials.

Heat-Resistant Coating for High-Speed, Dry, or MQL Machining

Coated with a high-performance heat-resistant layer, the tool withstands elevated temperatures and enables high-speed cutting even under dry or minimum-lubrication conditions, improving sustainability and reducing coolant usage.

Application-Specific Cutting Parameters Provided — Reducing Setup Time and Maximizing Performance

Each tool comes with optimized cutting data (rpm, feed, depth of cut) based on real-world applications in hardened steels. Users can rely on these guidelines to minimize trial-and-error, enhance tool performance, and improve overall machining efficiency.