Precision milling, turning, and multi-axis machining for prototypes and production runs. From simple brackets to complex aerospace components.
CNC (Computer Numerical Control) machining is a subtractive manufacturing process where computer-controlled machine tools remove material from a solid block (workpiece) to create a finished part. It is the most widely used precision manufacturing technology, offering the best combination of accuracy, material options, and surface finish among all manufacturing processes.
From one-off prototypes to high-volume production, CNC machining serves industries including automotive, aerospace, medical devices, electronics, and mold making. Moldkey connects you with ISO-certified CNC suppliers across China who can handle parts from millimeters to meters in size.
| Parameter | Standard | High Precision |
|---|---|---|
| Linear Tolerance | ±0.1 mm | ±0.005 mm |
| Surface Finish (Ra) | 3.2 µm (as-machined) | 0.2 µm (ground/polished) |
| Max Part Size | 2000 × 1000 × 800 mm | Dependent on machine |
| Min Feature Size | 0.5 mm | 0.05 mm (micro-machining) |
| Thread Specifications | M2 and above | M1 and above |
| Lead Time (prototype) | 5–10 business days | 2–5 business days (expedited) |
| Typical Quantity | 1–10,000 pcs | 1–500 pcs (prototyping) |
Standard vertical milling for flat and prismatic parts. Best value for simple geometries. Suitable for 80% of CNC parts.
Adds rotary motion around X-axis, enabling undercuts and complex curved surfaces in a single setup.
Full simultaneous 5-axis for complex aerospace, medical, and automotive parts. Fewer setups, tighter tolerances.
Lathe-based machining for cylindrical parts. Includes live tooling for mill-turn complex parts in one setup.
Electrical discharge machining for hardened materials, sharp internal corners, and precision punch/die sets.
Precision surface finishing for tight flatness and parallelism requirements (≤ 0.002 mm).
| Category | Materials | Typical Applications |
|---|---|---|
| Aluminum | 6061-T6, 7075-T6, 5052-H32, 6082 | Aerospace brackets, automotive parts, enclosures |
| Stainless Steel | 304, 316L, 17-4PH, 303 | Medical devices, food equipment, marine parts |
| Steel / Alloy | Mild steel, 4140, 4340, Tool steel (H13, D2) | Molds, dies, structural components, gears |
| Plastics | ABS, PC, POM (Delrin), Nylon, PEEK, PTFE | Prototypes, fixtures, electrical insulators |
| Copper / Brass | C110, C360, C17200 (Beryllium Copper) | EDM electrodes, electrical connectors, bushings |
| Titanium | Ti-6Al-4V (Grade 5), Grade 2 | Aerospace, medical implants, high-performance |
Core/cavity blocks, inserts, slides, electrodes — the backbone of tooling.
Engine components, transmission housings, brake calipers, custom brackets.
Structural brackets, wing ribs, landing gear components, turbine parts.
Implants, surgical instruments, diagnostic equipment housings, fixtures.
Heat sinks, connector housings, enclosures, jigs and fixtures.
Functional prototypes, proof-of-concept parts, low-volume production.
| ✅ Advantages | ⚠️ Limitations |
|---|---|
| Exceptional accuracy (±0.005 mm achievable) | Higher per-unit cost at large volumes compared to molding |
| Wide material selection (metals, plastics, composites) | Geometric limitations (internal corners need radii) |
| Excellent surface finish and repeatability | Material waste (subtractive process) |
| No tooling cost — ideal for prototypes and low-volume | Complex setups for 5-axis parts can increase cost |
Cost depends on part complexity, material, quantity, and tolerance requirements. Use our AI Quote for an instant estimate or post an RFQ for competitive bids from suppliers.
Standard lead times range from 5–10 business days for prototypes. Expedited services (2–5 days) are available at a premium.
Most designs in STEP, IGES, STL, or PDF format can be reviewed. Upload your design for a free feasibility check.
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