8.6mm 3 Flute Carbide Shank Relief End Mill AlTiCrN Coated for Mold Steel Die Casting High Feed Flat Bottom CNC Milling Cutter

Our 3-flute corner relief end mill is precision-engineered for high-performance machining of hardened mold steels (HRC 50+) and die-casting alloys. Featuring an advanced AlTiCrN nano-coating and specialized corner relief geometry, this carbide end mill delivers exceptional tool life and surface finish in deep cavity milling, mold base machining, and other demanding applications.

The unique flat bottom design with relieved corners prevents tool rubbing during side-wall machining, while the 3-flute configuration optimizes chip evacuation and reduces vibration - making it the ideal solution for high-speed, high-feed CNC operations.

• True corner relief design eliminates interference in deep pockets
• 3-flute asymmetric edge reduces harmonics for smoother cuts
• 30° helix angle balances chip removal and tool strength
• Flat bottom (0.1mm land) ensures precise floor finishing

• Japanese ultra-fine carbide (0.4μm grain) for maximum edge retention
• AlTiCrN nano-coating (3,800HV) with superior heat resistance (up to 1,100°C)
• Polished flutes minimize material adhesion in gummy alloys

• 5× longer life vs standard TiN-coated tools in H13 steel
• 20% higher feed rates enabled by optimized chip load
• Ra 0.4 μm surface finish achievable in finishing passes
• Reduced power consumption through efficient cutting geometry

• Diameter range: 1-20mm (0.039"-0.787")
• Cutting lengths: 3×D to 10×D
• Shank configurations: Straight, Weldon, HSK
• Special geometries: Variable helix, neck relief

• Mold & Die Manufacturing - Core/cavity machining in H13, P20, S7 steels; EDM electrode roughing
• Die Casting Production - Aluminum/Magnesium die mold maintenance; Overflow pocket milling
• Automotive Tooling - Forging die machining; Trim die maintenance
• General Precision Engineering - Titanium medical component pockets; Graphite electrode milling