CNC Machining Services
3-, 4-, and 5-axis milling and turning in 25+ metals and engineering plastics — prototypes in 5 working days, delivered across Europe
Microns Hub's CNC machining service covers 3-axis, 4-axis, and 5-axis simultaneous milling up to 1,000 × 500 × 350 mm, plus CNC turning up to 450 mm diameter, in aluminum, stainless steel, carbon steel, titanium, brass, copper, tool steel, and engineering plastics including POM, PEEK, and nylon. Standard tolerance is ISO 2768-m; tight tolerance is ISO 2768-f; feature-specific fits are held to H8. Prototype parts ship in 5 working days; low-volume production in 7; mid-volume runs up to 9. Material certificates EN 10204 3.1, First Article Inspection reports, and PPAP documentation are available on request at no extra charge.
Capabilities
- 3-axis CNC milling — Work envelope up to 1,000 × 500 × 350 mm; ideal for plates, housings, brackets, and prismatic parts.
- 4-axis CNC milling — Indexed 4th axis for rotary features; reduces setups on shafts, cams, and complex prismatic parts.
- 5-axis simultaneous milling — Work envelope up to 500 × 500 × 500 mm; produces aerospace brackets, impellers, medical components in a single setup.
- CNC turning — Up to 450 mm diameter; bar stock and chuck work; single- and multi-spindle capability on request.
- Swiss-type turning — Available through partners for long, slender parts and high-volume precision turning below 32 mm diameter.
- Wire and sinker EDM — For hardened steels, intricate geometries, and features that cannot be milled — available through specialist partners.
- Standard tolerance ISO 2768-m — General dimensional tolerance class applied by default; covers most features on most parts.
- Tight tolerance ISO 2768-f — Fine tolerance class available on call-out — suitable for fit-critical features and assemblies.
- Feature-specific H8 fits — For bore diameters, shaft fits, and precision features. Specify per feature in your drawing.
- As-machined surface finish Ra 3.2 μm — Standard finish for milled and turned parts; suitable for most functional and assembly applications.
- Fine finish Ra 0.8 μm — Achievable without secondary operations on appropriate materials and geometry.
- Full secondary operations — Tapping, reaming, deburring, bead blasting, polishing, heat treatment, and anodizing — all integrated into the quote.
- Prototype to production volumes — One-off prototypes through production runs to 10,000+ pieces. No minimum order quantity.
- Free material certificates — EN 10204 3.1 material traceability documents supplied free on request for any order.
Materials
| Material | Grade | Properties | Common Uses |
|---|---|---|---|
| Aluminum | 5083 / 6082 / 7075 | Lightweight, corrosion-resistant, weldable; 7075 is highest strength, 6082 is European 6061 equivalent | Enclosures, brackets, structural parts, aerospace components |
| Stainless steel | 304 / 304L / 316 | Corrosion-resistant, weldable, sterilizable; 316 for marine and chemical environments | Food and pharma equipment, medical fixtures, marine hardware |
| Carbon steel | C45 / S235 / S355 | High strength, weldable, cost-effective; heat-treatable for higher hardness | Structural components, shafts, tooling, machinery parts |
| Tool steel | D2 / H13 / 1.2379 | High wear resistance; suitable for dies, punches, and tooling | Dies, punches, mold inserts, cutting tools |
| Titanium | Grade 2 / Grade 5 (Ti-6Al-4V) | High strength-to-weight, biocompatible, corrosion-resistant | Aerospace brackets, medical implants, chemical equipment |
| Brass | CW614N / C360 | Free-machining, corrosion-resistant, decorative finish | Fittings, bushings, decorative hardware, electrical parts |
| Copper | C101 / C110 | High electrical and thermal conductivity | Heat sinks, electrical bus bars, thermal management parts |
| POM (Delrin) | POM-C / POM-H | Low friction, dimensional stability, chemical resistance | Gears, bushings, precision mechanical parts |
| PEEK | Virgin PEEK / 30% GF | High-temperature resistance, chemical resistance, biocompatible | Medical components, high-temperature seals, aerospace parts |
| Nylon | PA6 / PA66 | Tough, wear-resistant, good machinability | General engineering plastic parts, bushings, covers |
Tolerances & Specifications
| Spec | Value | Notes |
|---|---|---|
| General dimensional tolerance (standard) | ISO 2768-m | Applied by default to all dimensions unless otherwise specified |
| General dimensional tolerance (tight) | ISO 2768-f | Applied on call-out; suitable for fit-critical features |
| Feature-specific fits | H8 | For bore diameters, shaft fits, and precision assemblies — specify per feature |
| Surface finish (as-machined) | Ra 3.2 μm | Standard finish for milled and turned surfaces |
| Surface finish (fine, no secondary ops) | Ra 0.8 μm | Achievable on appropriate materials and geometry |
| Milling work envelope (3/4-axis) | 1,000 × 500 × 350 mm | Larger parts on request — contact engineering |
| 5-axis simultaneous work envelope | 500 × 500 × 500 mm | For complex single-setup parts |
| Turning maximum diameter | 450 mm | Bar stock and chuck work; multi-spindle available on request |
How It Works
- Step 1: Upload your CAD — STEP preferred. We also accept STL, IGES, SolidWorks native, Parasolid, and PDF drawings for inspection callouts.
- Step 2: Automated or engineer quote — Standard geometries get an instant price. Complex 5-axis parts, tight tolerances, or certification-driven jobs go to engineering review within the working day.
- Step 3: DFM review by assigned engineer — Your assigned mechanical engineer reviews the part for manufacturability — undercut access, tool reach, material stability, cost-reduction opportunities — and returns feedback before production starts.
- Step 4: CNC production — Job runs in a qualified EU partner shop. ISO 9001:2015 baseline; AS9100, ISO 13485, or IATF 16949 partners assigned when your application requires it.
- Step 5: QC, documentation, and EU delivery — Dimensional inspection before dispatch. Material certificates (EN 10204 3.1), FAI reports, and PPAP on request at no extra charge. Pan-EU transit 2–4 days.
Lead Times
| Tier | Quantity | Working Days |
|---|---|---|
| Prototype | 1–5 pieces | 5 days production + 2–4 EU transit |
| Low volume | 5–200 pieces | 7 days production + 2–4 EU transit |
| Mid volume | 200–5,000 pieces | 9 days production + 2–4 EU transit |
Applications
- Aluminum electronics enclosures — 6082-T6 or 5083 enclosures with internal pockets, threaded inserts, and integrated heat-sink fins. Typical batch: 25–500 pieces.
- Stainless steel brackets and fittings — 304, 304L, and 316 structural brackets for food, pharma, and marine applications requiring passivation. Typical batch: 10–200 pieces.
- Precision mechanical components — Shafts, hubs, bushings, and housings machined to ISO 2768-f with H8 bore fits. Common in robotics and industrial automation.
- Medical-grade machined parts — Instruments, fixtures, and housings in 316L stainless or titanium Grade 5, produced through partners holding ISO 13485.
- Aerospace-grade components — Aluminum 7075 and titanium Grade 5 brackets, housings, and structural parts with full traceability and AS9100 partner routing available.
- Engineering plastic parts — POM (Delrin), PEEK, and nylon bushings, gears, and wear parts — for applications where chemical resistance or low friction matter.
Why Microns Hub
- Price guarantee via direct producer network — We work directly with producing partners, not through layers of middlemen. That lets us quote lower than Xometry, Protolabs, or Hubs on comparable specs — and honor the price.
- 5-day prototype lead time, published and held — Five working days production on CNC prototypes is our published standard, not a marketing claim. We hold the date or refund the expedite charge.
- Free EN 10204 3.1 material certificates — Material traceability documents are included free on request on every order. Most marketplace competitors charge extra for this or route it through a back-channel request; we bake it in.
Frequently Asked Questions
What tolerance can you hold on CNC machined parts?
ISO 2768-m is our default general tolerance. For fit-critical features we apply ISO 2768-f on call-out. Feature-specific fits — bore diameters, shaft fits, precision assemblies — are held to H8. Call out tighter specs directly on your drawing; our engineering team will confirm feasibility at quote stage and price the work accordingly. Our best-case tolerance on a single-feature callout in appropriate materials is in the H8 range.
What's the lead time for CNC parts?
Prototype quantities (1–5 pieces) ship in 5 working days. Low-volume runs (5–200 pieces) ship in 7 working days. Mid-volume runs (200–5,000 pieces) ship in 9 working days. Pan-European transit is typically 2–4 working days on top. If you have a specific deadline, tell us at quote stage — our assigned engineer will confirm what is genuinely achievable rather than promise a lead time we cannot hold.
Can you machine 5-axis parts?
Yes. We run 5-axis simultaneous milling up to 500 × 500 × 500 mm through qualified partners. 5-axis is the right choice for undercut features, complex curvatures, aerospace brackets, impellers, and any part where reducing setups protects tolerance stacking. We will advise at DFM stage whether your part actually benefits from 5-axis or can be produced more economically on 3-axis with a fixture.
What file formats do you accept?
STEP is our preferred format for all CNC work. We also accept STL (less ideal for machining — we'll convert), IGES, SolidWorks native (.SLDPRT), Parasolid, and PDF drawings for inspection callouts and GD&T. Send a 3D model plus a PDF drawing if your part has tolerance callouts, material specs, or surface finish requirements that don't fit in the CAD metadata.
Is there a minimum order quantity?
No. We quote single prototypes as readily as production runs. Per-part pricing drops substantially with volume — a part that costs €80 at quantity 1 can drop to €20 at quantity 100 as setup is amortized across the batch. Upload your CAD with your target quantity (including future production forecasts) so we can quote the full curve.
Do you offer design-for-manufacturing feedback?
Every project is assigned a mechanical engineer before it enters production. Your engineer reviews the part for manufacturability — wall thickness, tool access, material choice, tolerance stacking — and returns feedback within the same working day. Common DFM wins include adding corner reliefs, consolidating secondary operations, substituting a more machinable material grade, and reducing setups by revising a single datum. Feedback is included in every quote at no extra cost.
What certifications are available?
Our network holds ISO 9001:2015 certification by default. Partners with AS9100/EN 9100 for aerospace, ISO 13485 for medical devices, and IATF 16949 for automotive are assigned when your application requires it — mention your certification requirements at quote stage. Material certificates (EN 10204 3.1), First Article Inspection reports, and PPAP documentation are available on request at no extra charge.
Related Services
-
Sheet Metal Fabrication
When your part starts from flat stock — laser cutting, bending, and welding up to 4 m long.
-
3D Printing
For geometries CNC cannot reach, or when you need a functional prototype in 5 days.
-
Surface Finishing
Anodizing, powder coating, passivation, nickel plating — added to any CNC part in about 4 working days.
MICRONS HUB DV Ε.Ε. · VAT: EL803129638 · GEMI: 190254227000 · Industrial Area, Street B, Number 4, 71601 Heraklion, Crete, Greece