CNC machining for custom mechanical parts with air holes requires precise control over hole positions, diameters, and depths. First, program according to the blueprint and select high-speed steel or carbide tools to ensure stable cutting. During processing, use a cooling system to prevent overheating and employ multi-axis linkage to ensure the air holes align with the part's curved surface. After completion, conduct airtightness tests. These parts are suitable for pneumatic systems, heat dissipation components, etc., balancing structural strength and ventilation performance