4-Flute 55-Degree HRC55 Coated Extended Straight Shank Carbide Corner Radius CNC End Mill

We manufacture this 4-flute end mill from high-grade carbide, designed with a 55-degree helix angle and HRC55 hardness for tough machining tasks. Its extended straight shank enables deep-cavity or long-reach operations, while the wear-resistant coating enhances tool life. The corner radius (bull nose) design balances precision and durability, making it ideal for semi-finish and finish milling of hardened steels, molds, and mechanical parts in CNC systems.