HEM employs several techniques to achieve high efficiency: 1. High-Speed Cutting: Utilizing high rotational speeds to increase the rate of material removal. 2. Optimized Tool Paths: Designing tool paths that reduce unnecessary movements and distribute cutting forces evenly. 3. Advanced Tooling: Using cutting tools made from materials like carbide or coated with diamond to reduce wear and extend tool life. 4. Adaptive Control: Implementing real-time monitoring and control systems to adjust milling parameters dynamically based on the material's behavior.