Carbide End Mill Set, 5pcs CNC Router Bits Square End Mills with Coating Router Bit for Aluminum, Alloy Steels, Hardened Steel, Copper Milling Cutting (1/4" CD x 1/4" SHK x 3/4" CL x 2-1/2" OAL)
INDUSTRY-GRADE CARBIDE PERFORMANCE: Micrograin tungsten carbide construction delivers 3X longer tool life than standard end mills, withstanding temperatures up to 1000°C for precision machining of hardened steels, alloys, and composites.
NANO BLUE COATING TECHNOLOGY: Advanced heat-resistant coating outperforms TiAlN/TiCN in thermal stability, reducing friction by 40% while maintaining cutting edge sharpness for mirror-finish results on copper, magnesium, and high-silicon aluminum.
PRO-GRADE TOLERANCE CONTROL: ±0.02mm (±20μm) runout tolerance ensures CNC-level accuracy for deep cavity milling applications in mold making and aerospace components.
MULTI-MATERIAL VERSATILITY: 4-flute design optimized for steel, cast iron, and non-ferrous metals - includes pre-hardened steel machining capability with built-in chip breakers for clean swarf removal.
QUALITY-CERTIFIED MANUFACTURING: Each cnc end mill undergoes 3-stage inspection, backed by HQMaster's 10 years of cutting tool expertise for professional machine shops and serious DIYers.