Precision
Multi-Axis
CNC Milling
3-axis, 4-axis & 5-axis simultaneous CNC machining to ±0.005 mm. Prototype to production — 40+ materials, global DDP delivery from Shenzhen.
Precision Multi-Axis CNC Machining — Global Reach from Shenzhen
With over a decade of precision CNC machining experience, Metalworks Plus is a trusted manufacturing partner for high-tolerance milled and turned components across aerospace, medical device, automotive, defence, and advanced industrial sectors.
Our core expertise spans the full axis spectrum: 3-axis CNC milling for cost-effective prismatic components, 4-axis CNC milling with rotary indexing for complex cylindrical geometries, and full 5-axis simultaneous CNC milling for intricate single-setup production — delivering undercuts, freeform contoured surfaces, deep cavities, and compound angles with micron-level accuracy (±0.005 mm).
- Renishaw spindle probing with in-process part verification — eliminating rework
- Fanuc, Siemens & Heidenhain CNC controls — maximum toolpath fidelity
- Full CMM dimensional inspection with traceable reports on every order
- DFM (Design for Manufacturability) review included at no additional cost
- DDP shipping: we handle all customs documentation and duties globally
3-Axis, 4-Axis & 5-Axis CNC Milling — Which Do You Need?
Each axis configuration unlocks different geometric possibilities. Understanding the tradeoffs is the first step to specifying the right process for your part.
3-AXIS
3-Axis Milling
The standard for cost-effective prismatic components. The cutting tool traverses three orthogonal linear axes simultaneously, producing flat surfaces, pockets, slots, holes, and 2.5D profiles with outstanding repeatability and speed.
4-AXIS
4-Axis Milling
A rotary A-axis (rotation about X) is added, allowing the workpiece to be indexed or continuously rotated. This enables multiple faces to be machined in a single setup — reducing fixturing errors and dramatically improving geometric accuracy on cylindrical and cam-profile parts.
5-AXIS SIMULTANEOUS
5-Axis Milling
Two additional rotary axes (B and C) allow the cutting tool to approach the workpiece from virtually any vector — enabling undercuts, compound angles, and complex organic surfaces in a single clamping. The definitive solution for aerospace-grade accuracy, medical implants, turbine blades, and impellers.
All our 5-axis machining centres are equipped with Renishaw RMP60 wireless spindle probing and Renishaw OMP60 workpiece inspection — delivering in-process dimensional verification, automatic tool length measurement, and first-part-correct accuracy on every production run.
Micron-Level Tolerances Across All Materials
We consistently exceed the ISO 2768-m general tolerance standard across every material category. The figures below represent our achievable tolerances under controlled production conditions — not theoretical limits.
Machine Specifications
Quality & Inspection Equipment
Every production order includes in-process and post-process dimensional inspection using calibrated equipment traceable to national standards (NIST / NPL).
Accepted CAD File Formats
STEP (.stp / .step) is preferred for maximum geometric fidelity. We also accept IGES, SolidWorks (.sldprt), Parasolid (.x_t / .x_b), AutoCAD (.dwg) and PDF engineering drawings with full GD&T annotation.
Our CNC Prototyping & Production Process
A rigorous, transparent workflow from first enquiry to final delivery. Every stage is documented, inspected, and communicated — no surprises, no rework.
Inquiry & Quoting
Upload your STEP/IGES file or engineering drawing. Our applications engineers review every submission and respond with a detailed, itemised quotation within 24 hours. Quantity breaks, material alternatives, and lead-time options included.
DFM Review
Design for Manufacturability analysis at no extra charge. We flag thin walls, tight-radius features, undercuts, and potential tolerance stack-up — with concrete suggestions to improve yield, cost, and lead time before a single chip is cut.
CAM Programming
Hypermill and Mastercam toolpath generation optimised for each axis configuration. Collision simulation, virtual machine verification, and cutting parameter optimisation ensure first-off accuracy and tool life efficiency.
Machining & In-Process QC
Renishaw on-machine probing verifies datum positions and critical features mid-cycle. In-process CMM spot checks catch deviation before it propagates. Statistical process control (SPC) is active on all volume production runs.
Finishing & Dispatch
Post-machining surface treatments applied in-house or by certified partner facilities. Final CMM report, Certificate of Conformance, and material certs included. Packaged to your specification — DDP, FOB, DHL/FedEx express.
Surface Treatments for CNC Milled Parts
All surface finishing processes are managed within our supply chain. Parts arrive ready to use — no secondary processing required on your side.
Anodizing (Type II & III)
Hard-coat and standard anodizing in clear or custom colour. Excellent wear resistance, MIL-A-8625 compliant.
Powder Coating
Electrostatically applied for superior chemical resistance. Full RAL colour range, textures from matte to gloss.
Brushed & Mirror Polishing
Uniform satin grain (Ra 0.4 μm) to optical mirror finish (Ra <0.1 μm). Hygienic and decorative applications.
Electroplating
Nickel, hard chrome, zinc, gold and silver. Adds hardness, lubricity and conductivity to critical surfaces.
Bead & Sand Blasting
Glass bead or ceramic media for uniform matte texture. Ideal prep for anodizing, painting or coating.
Passivation
Citric acid or nitric acid passivation per ASTM A967. Removes free iron from stainless for maximum corrosion resistance.
Black Oxide
Low-friction, anti-glare magnetite coating for steel components. Preserves dimensional accuracy — no build-up.
Heat Treatment
Stress relieving, hardening, tempering and carburizing. Managed through certified partner facilities with full traceability.
Ra surface roughness as-machined: 0.8 – 3.2 μm · Post-polished: 0.2 – 0.8 μm · Mirror: <0.1 μm
40+ Materials for Any Engineering Application
From common structural alloys to exotic aerospace superalloys and high-performance polymers — we stock, certify, and machine the widest material range in the industry. All material certifications and batch traceability documents supplied on request.
Certified Raw Material
Mill certs (EN 10204 3.1 / 3.2) provided. Full traceability to melt batch.
Exotic Alloy Specialists
Inconel, Monel, Hastelloy, Titanium Ti-6Al-4V — materials others struggle with.
Medical-Grade Polymers
PEEK, UHMW, PTFE, Ultem — biocompatible machining with full cleanliness protocols.
- AlAluminum 6061
- AlAluminum 7075
- SSStainless 303 / 304
- SSStainless 316 / 316L
- SS17-4PH Stainless
- BrBrass C360
- CuCopper C110
- TiTitanium Grade 5
- InInconel 718
- MoMonel 400
- StSteel 1018 / 4140
- TSA2 / D2 Tool Steel
- MgMagnesium AZ31B
- ZnZinc Alloy
- PKPEEK
- DLDelrin / Acetal
- PTPTFE
- UHUHMW-PE
- UIUltem / PEI
- NyNylon PA6 / PA66
- PCPolycarbonate
- ABSABS
- POAcetal POM
- HDHDPE
- ACAcrylic PMMA
- PPPolypropylene
- PVPVC
- G1G10 Garolite
- CFCarbon Fibre CFRP
- FGFiberglass GFRP
- KvKevlar / Aramid
- BkBakelite
- SiSilicone / EPDM
- CeAlumina Ceramic
- CeZirconia Ceramic
- FmRohacell Foam
Industry-Recognized Certifications
Our certifications are not paperwork — they define our production methodology, inspection protocols, and continuous improvement culture.
Quality Management Systems
Consistent process control and continuous improvement across all machining operations, supplier qualification, and supply chain touchpoints.
Medical Device Quality
Precision machining of surgical and implantable instruments with full traceability, sterile packaging support, and biological risk control.
Automotive Quality System
PPAP, FMEA, control plans, and statistical process control (SPC) for automotive-grade machined components and sub-assemblies.
Aerospace & Defence
Full material traceability, risk management, and first-article inspection for flight-critical aerospace programs and defence contracts.
Environmental Management
Sustainable machining with coolant recycling, controlled waste disposal, energy efficiency monitoring, and reduced carbon footprint initiatives.
ITAR & EAR Compliance
Compliant manufacturing for US defence and aerospace export-controlled programs with controlled facility access and full documentation protocols.
From Shenzhen to the World — Our Supply Process
A streamlined four-stage workflow with complete visibility at every step. From your CAD file to your door — typically in 5–15 business days.
Inquiry & Quote
Upload STEP/IGES file or email drawings. Receive a full, itemised quotation with DFM notes within 24 hours. No obligations — no minimum order.
DFM & Programming
Design review, CAM toolpath generation, fixture design, and material procurement. Virtual machine simulation before a single cut is made.
Machining & QC
In-process Renishaw probing, CMM dimensional verification, and 100% visual inspection. FAI report, material certs, and CoC included as standard.
Packaging & Dispatch
Custom packaging to prevent transit damage. DHL/FedEx express, air freight, or sea freight. DDP available — we handle all customs clearance.
Headquartered in Shenzhen, China — serving clients across North America, Europe, Australia, Japan and Southeast Asia. Express delivery typically 5–7 business days for air freight. Sea freight from 12 business days.
Frequently Asked Questions
Everything engineers and procurement managers need to know about our multi-axis CNC machining services.
Ask a Technical QuestionTrusted by Engineers Across Critical Sectors
From single prototypes to long-run serial production — we serve the world's most demanding precision engineering sectors.
Aerospace
Turbine housings, structural brackets, flight-critical components to AS9100D
Medical
Surgical guides, implant components, orthopaedic instruments — ISO 13485
Automotive
Prototype manifolds, EV battery housings, transmission components — IATF 16949
Robotics
End effectors, servo mounts, chassis plates, precision motion hardware
Industrial
Valve bodies, custom gears, pump housings, hydraulic manifolds
Start Your Project Today
Our engineers review every inquiry personally. Upload a CAD file or describe your project — we respond within 24 hours with a full quotation.
Direct Contact
Shenzhen City, Guangdong 518000, China
No.175 Yue An Road, GuangMing, Shenzhen
Your Parts. Quoted in 24 Hours.
Delivered Globally.
Upload your CAD file or describe your project. Our engineering team responds with a full quotation, DFM feedback, material alternatives, and lead-time estimate within one business day.