3mm 4 Flute Solid Carbide End Mill Micro Grain Tungsten Steel Milling Cutter for Steel CNC Precision Tool HRC55 Hardness TiAlN Coated

Our 3mm 4-flute solid carbide end mill is engineered for high-precision machining in steel (up to HRC55), aluminum, and other engineering materials. Manufactured from ultra-fine micro-grain tungsten carbide (0.5μm grain size) with advanced TiAlN coating, this precision cutting tool delivers exceptional wear resistance and thermal stability in demanding CNC applications. The optimized 4-flute design provides perfect balance between material removal rate and surface finish quality.

• 0.5μm micro-grain tungsten carbide substrate (YG6X grade)
• Advanced TiAlN coating (3-4μm thickness) for high-temperature operations
• Precision ground cutting edges with ±0.003mm tolerance
• 35° helix angle for smooth chip evacuation
• 1/8" (3.175mm) shank with h6 tolerance
• Special edge preparation for improved edge retention
• Mirror finish flute surfaces (Ra 0.1μm) for aluminum applications

• 5* longer tool life than standard carbide end mills
• Exceptional wear resistance in hardened steels
• Reduced cutting vibration for superior surface finish (Ra 0.4μm achievable)
• Maintains dimensional accuracy in prolonged machining
• Suitable for high-speed machining (HSM) strategies

• Precision mold and die components
• Micro mechanical parts manufacturing
• Aerospace small component machining
• Medical device fabrication
• Jewelry and watchmaking
• High-precision instrumentation