| Aspect | Sheet Metal Fabrication | CNC Machining |
| Process | Cutting, bending, and forming sheet metal | Material removal using computer-controlled tools |
|
Suitable Materials |
Metals (e.g., steel, aluminum, copper) | Metals, plastics, wood, composites |
| Complexity | Limited complexity, best for simple shapes | High complexity, suitable for intricate designs |
| Tolerances | Moderate tolerances, +/- 0.1 mm to +/- 0.5 mm | High tolerances, +/- 0.025 mm to +/- 0.05 mm |
| Setup Time | Short setup time, especially for repeat orders | Longer setup time due to tooling and fixturing |
| Lead time |
Quick turnaround for simple parts |
Longer lead times due to setup and machining |
|
Cost |
Cost-effective for high-volume production |
Higher cost per unit for low-volume production |
| Material Waste |
Minimal material waste |
Moderate material waste due to cutting operations |
|
Surface Finish |
Limited surface finishes without additional steps |
Wide range of surface finishes achievable |
| Strength & Durability |
Suitable for moderate strength and durability |
Provides excellent strength and durability |
| Aesthetics |
Limited aesthetic options without additional steps |
Offers greater aesthetic flexibility and detail |
This comparison chart highlights the key differences between sheet metal fabrication and CNC machining, including the process, suitable materials, complexity, tolerances, setup time, lead time, cost, material waste, surface finish, strength and durability, and aesthetics. Depending on your specific project requirements, one method may be more suitable than the other.