Also called: CNC milling, CNC routing
CNC machining uses computer-controlled cutting tools to carve parts from a solid block or sheet of material. Unlike 3D printing, which adds material, CNC removes it. It's great for precise, strong parts, especially in metal.
Good for
- Precise metal parts
- Aluminum brackets and housings
- Wood furniture and signs (CNC routing)
- Parts needing tight tolerances
How it works
- You upload a 3D file (STEP files are best for CNC) and note any critical dimensions.
- The shop plans the cutting toolpaths.
- The part is cut, then deburred and finished.
- Optional finishing like anodizing or polishing.
Pros and cons
Pros
- Very precise
- Full strength of solid material
- Excellent surface finish
Cons
- Some shapes (deep internal channels) are impossible
- Setup costs make single parts pricier
- Material waste
Questions to ask the shop
- Which file format do you prefer?
- What tolerances can you hold?
- Is 3D printing cheaper for my design?
Common materials
Aluminum · Stainless steel · Brass / bronze · Wood / plywood · Acrylic
Common questions
CNC or 3D printing? CNC is best for precise, strong parts with simpler shapes, especially in metal. 3D printing is better for complex shapes and low-cost plastic parts.
Related services
Metal printing · Laser cutting and engraving · Reverse engineering
Find cnc machining near you
Find shops offering cnc machining near you, or upload your file for a quote.