CNC Machining Services for UK Product Teams
When you need metal or plastic parts that hold tight tolerances and look production-ready, CNC machining is usually the fastest path from CAD to physical part. At SkillsProto, we run 3-axis, 4-axis and 5-axis milling plus CNC turning — so we can quote complex geometries in aluminium, steel, stainless steel, brass, POM and engineering plastics, and ship prototypes within 3–7 working days.
Whether you are validating a fit-check prototype, building a low-volume production batch or machining end-use brackets and enclosures, our engineering team reviews every CAD file for manufacturability before the first chip is cut.
Why UK engineers choose SkillsProto for CNC parts
- DFM review included: we flag impossible radii, thin walls, deep pockets and tolerance conflicts before quoting.
- Tolerances to ±0.05 mm on critical dimensions, with ISO 2768-m standard as default.
- No minimum order quantity: 1 prototype or 1,000 production parts.
- Multiple metals and plastics from stock, reducing material lead time.
- One project manager for multi-process assemblies that combine CNC with sheet metal or 3D-printed inserts.
CNC machining capabilities overview
| Capability | Specification |
|---|---|
| Equipment | 3-axis, 4-axis and 5-axis CNC mills; CNC lathes |
| Metals | Aluminium 6061/7075, steel 1045/4140, stainless 303/304/316, brass, copper |
| Plastics | POM (Delrin), ABS, PE, PEEK, nylon, PTFE |
| Max part size | 600 × 400 × 300 mm (larger on request) |
| Standard tolerance | ISO 2768-m |
| Tightest tolerance | ±0.05 mm on machined features |
| Surface finish | As-milled, bead blast, anodise, powder coat, electroless nickel, chrome plate |
| Typical lead time | 3–7 working days for prototypes |
| Minimum order | 1 piece |
CNC finishing options
A machined part is rarely finished as-milled. We offer:
- Anodising (Type II and Type III) for aluminium — adds corrosion resistance and colour.
- Bead blasting — uniform matte finish, hides minor tool marks.
- Powder coating — durable colour finish for steel and aluminium enclosures.
- Electroless nickel — wear and corrosion resistance for steel.
- Polishing / brushed finish — cosmetic aluminium and stainless parts.
Industries served with CNC machining
- Automotive: brackets, jigs, adapters, suspension components and trim prototypes.
- Aerospace: lightweight aluminium fixtures, test rigs and instrumentation housings.
- Medical: surgical instrument handles, device housings and alignment tools.
- Electronics: heatsinks, chassis panels, connectors and mounting plates.
- Robotics: structural links, motor mounts, end-effector components.
CNC machining vs 3D printing: which should you choose?
| Factor | CNC Machining | 3D Printing |
|---|---|---|
| Best for | Tight tolerances, metals, smooth surfaces | Complex geometry, internal channels, rapid iteration |
| Materials | Metals + engineering plastics | Polymers + some composites |
| Tolerance | ±0.05 mm typical | ±0.2 mm typical |
| Surface | Smooth, production-ready | Layered, may need post-processing |
| Lead time | 3–7 days | 2–5 days |
| Cost per part | Economical at 10–1,000+ units | Economical at 1–10 units |
Frequently Asked Questions (CNC Machining)
Q1: What file formats do you accept for CNC machining quotes? A: STEP (.stp/.step), IGES (.igs) and SolidWorks (.sldprt/.sldasm). STL is accepted for reference only. Please include a 2D drawing for tight tolerances or GD&T callouts.
Q2: What is your typical CNC prototype lead time to the UK? A: 3–7 working days after order confirmation, depending on material availability and part complexity. Express options are available.
Q3: Can you hold ±0.05 mm tolerance? A: Yes, on critical features that the geometry allows. We will flag any features that cannot reliably hold the requested tolerance during the DFM review.
Q4: Do you offer anodising or powder coating in-house? A: We manage finishing through audited partner facilities and include finishing in your single quote and lead time.
Q5: Is there a minimum order quantity? A: No. We regularly machine single prototypes for fit-check and design validation.
Get a CNC machining quote
Upload your CAD and 2D drawing for a free DFM review and quote within 24 hours.
[Request a Quote — CNC Machining]