CNC machining remains a powerful manufacturing method, but not all parts are suited for fully subtractive processes. When designs require removing 70–80% of the original material, machining becomes inefficient, increasing costs, cycle times, and tool wear without adding functional value.
These scenarios often highlight a mismatch between design and manufacturing strategy. Complex internal channels, organic geometries, or hard-to-reach features push machining beyond its practical limits, forcing compromises or multi-part assemblies.
In real-world applications, alternative approaches such as casting, additive manufacturing, or hybrid workflows can deliver better results. These methods allow near-net-shape production, reducing material waste and minimizing unnecessary machining operations.
A common strategy is to combine processes, using additive or casting for the base geometry, and machining only where precision is critical. This approach improves efficiency while maintaining tight tolerances where needed.
Ultimately, choosing the right manufacturing method is a strategic decision. When applied correctly, it reduces cost, simplifies production, and enhances overall part performance.