The machining of humanoid robot components must balance high precision, high rigidity, and lightweight design. This includes gear hobbing and grinding for the flexible and rigid wheels of harmonic reducers; turning and milling of motor shafts; five-axis CNC machining and topology-optimized aluminum alloy milling of skeletal structural components; ultra-precision grinding and lithography for force sensors and encoders; EDM and micro-milling of tiny parts for dexterous grippers. Strict control of surface roughness, dynamic balance, and dimensional consistency is required, often in conjunction with automated production lines and in-process inspection to ensure mass-production reliability.