CNC thread machining is a critical process in manufacturing, requiring a balance between high quality (accurate thread dimensions, surface finish, and structural integrity) and efficiency (minimized cycle times and reduced waste). Achieving quality threads begins with selecting the right tooling: taps and dies must be made from high-speed steel (HSS) or carbide, with appropriate coatings such as titanium nitride (TiN) or titanium carbonitride (TiCN) to resist wear and extend tool life. The thread geometry—including pitch, major diameter, minor diameter, and thread angle—must be precisely programmed into the CNC system to ensure compatibility with mating parts. CNC machines offer advanced features like rigid tapping (synchronized spindle and feed motion) and thread milling, which provides greater flexibility than traditional tapping, especially for large or non-standard threads. Rigid tapping eliminates the need for a floating tap holder, reducing backlash and improving thread accuracy. Surface finish is another quality 指标；excessive tool wear or improper cutting parameters can cause thread tearing or burrs, which weaken the thread and hinder assembly. To enhance efficiency, optimizing cutting parameters is essential: spindle speed and feed rate are adjusted based on the material (e.g., aluminum allows higher speeds than stainless steel) to maximize material removal rate without compromising quality. Toolpath optimization, such as minimizing non-cutting time by sequencing operations efficiently, reduces cycle times. Additionally, using multi-functional tools that can perform drilling, countersinking, and threading in a single setup eliminates tool changes, saving time. Quality control checks, including thread gauging (using go/no-go gauges) and optical inspection for surface defects, ensure threads meet standards like ISO or ANSI. By combining high-quality tooling, precise programming, and optimized parameters, CNC thread machining can achieve both superior thread quality and high production efficiency, making it indispensable in industries where reliable fasteners are critical.