5PCS HRC60 D6x15x50-4F Φ6mm Carbide Square End Mill Ultrafine Particles Carbide End Mills for Alloy Steel Hardened Steels 4 Flute Straight End Mill Cutter Tungsten steel Nano Coating Square Carbide Milling Cutter (Φ6 * 5pcs)

Nano black PVD Coating : TiAlN (Titanium aluminum nitride) coating lubricates the end mill ,to stabilize processing performance in high temperature,endows mills Strong bonding and high wear resistance. ☞ Material: Cutter is made of tungsten steel micro grain , offers high cutting performance and increases the wear resistance of the cutter.Suitable for stainless steel, die steel, tool steel, cast iron parts. ☞Feature : Multi-layer Nano coating, easy working on heat-treated materials below HRC55°-HRC58° from rough machining to fine machining.

HRC65 hardness end mills, 35° fine grinding spiral groove , 4Flutes * 2 Cutting edges, make chip evacuation out more smoothly. ☞Advantage: Adopting a suitable negative rake angle design, taking into account the strength of the cutting edge and the rigidity of the tool holder.,make it easy to use for long time.