Custom CNC
Machining Services
High-precision 3, 4 & 5-axis CNC milling, turning, routing, and Swiss micro-machining for rapid prototypes and production runs. Tolerances down to ±0.005 mm (0.0002″), 100+ certified metals and plastics, with 100% CMM inspection and full material traceability.
What is Custom CNC
Machining?
Weldo CNC machines custom parts to tolerances of ±0.005 mm from 100+ materials — metals and engineering plastics — at its own 100-machine facility in Dongguan, China. Prototype parts ship in 1–5 business days. ISO 9001:2015 certified — every tight-tolerance order ships with a CMM-verified dimensional inspection report referenced against your drawing revision.
CNC stands for Computer Numerical Control. The machine reads a toolpath generated from your 3D model and a cutting tool removes material until the part matches that geometry. No moulds, no manual intervention mid-cut. The same file run on Monday produces the same part on Friday — that repeatability is the point.
Advantages of CNC Machining
The subtractive process of CNC machining provides multiple benefits for both prototyping and production parts.
CNC Machining Applications
Custom CNC machining covers a broad range: structural brackets, fluid manifolds, housings, shafts, impellers, medical components, aerospace fittings. Upload your STEP file, specify the material, tolerance class, and quantity — a quote comes back within 24 hours, with DFM (Design for Manufacturability) notes included if anything needs attention before cutting starts.
CNC Machining Design Guide
In this guide to CNC machining, you'll learn how to create efficient, manufacturable metal and plastic parts for prototyping and production.
CNC Machining Processes
Three core processes — the right one is determined by your part geometry, not machine availability.
Custom CNC Milling
High-precision multi-axis machining capable of producing complex geometric components with tight tolerances and smooth surface finishes. Supports everything from rapid prototyping to full-scale, high-volume production runs.
Brackets, housings, manifolds, structural parts, complex multi-face components - Tolerance: ±0.005 mm · 5-axis: ±0.003 mm
Custom CNC Turning
High-precision custom turning for cylindrical, conical, and threaded components. Utilizes multi-axis CNC lathes equipped with live tooling to efficiently machine complex features in a single setup.
Cylindrical, conical, threaded components - Tolerance: ±0.005 mm · Workpiece diameter: Ø2 mm – Ø200 mm
CNC Routing Services
Large-format cutting, shaping, and precision engraving designed for flat sheet materials. Ideal for processing plastics, soft metals, and foams across wide-area surface geometries.
Aluminum, acrylic, polycarbonate, foam · Flat sheet cutting & engraving - Work envelope: up to 4000 × 1500 mm
Our CNC Machining &
Fabrication Services
Get a Quote
CNC Milling Description
CNC Turning Description:
CNC Turning Description:
3-axis, 4-axis, and 5-axis milling for prismatic and complex geometries. Tolerances to ±0.005 mm.
CNC Turning Description:
Tolerances & Maximum Part Dimensions by Process
The table below confirms what each process can hold — verified at our facility, not copied from a textbook.
| Process ↕ | Maximum Part Size | Standard Tolerance ↕ | Tight Tolerance ↕ | Surface Finish (as machined) |
|---|---|---|---|---|
| 3-Axis CNC Milling | 4,000 × 1,500 × 600 mm | ±0.1 mm ISO 2768-m | ±0.005 mm | Ra 1.6–3.2 µm |
| 4-Axis CNC Milling | 4,000 × 1,500 × 600 mm | ±0.1 mm | ±0.005 mm | Ra 1.6–3.2 µm |
| 5-Axis CNC Milling | Confirm per machine envelope ⚠️ | ±0.02 mm ISO 2768-f | ±0.003 mm | Ra 0.8–1.6 µm |
| CNC Turning (2-axis) | Ø200 × 500 mm | ±0.1 mm | ±0.005 mm | Ra 0.8–3.2 µm |
| CNC Turn Mill | Ø200 × 500 mm | ±0.05 mm | ±0.005 mm | Ra 1.6–3.2 µm |
| Swiss CNC Turning | Ø32 × 300 mm | ±0.02 mm | ±0.005 mm | Ra 0.4–1.6 µm |
| Wire EDM | 500 × 400 × 300 mm | ±0.02 mm | ±0.005 mm | Ra 0.8–1.6 µm |
| CNC Grinding (Surface) | 1,000 × 500 mm | ±0.01 mm | ±0.005 mm | Ra 0.2–0.8 µm |
Note: Tight tolerances are achievable on features suited to that level of control. Part geometry, material, and feature accessibility affect what is practical. If a callout is at the limit, DFM review flags it before quoting.
Quality Control &
Production Inspection
Material Verified Before Cutting Starts
Mill cert checked against order — alloy grade, heat number, temper designation logged. Drawing reviewed and signed off. Dimensional callouts flagged before the first cut, not after.
In-Process Checks at Every Setup Change
Calibrated hand tools and CMM used at defined intervals. Datum references verified after each setup. Deviations caught in-process — not at final inspection.
CMM Report Ships With Every Tight-Tolerance Order
Measured values recorded per feature — nominal, tolerance, actual, pass/fail — against your drawing revision. Inspection report, material cert, and packing list in every shipment.
See Our Facility in
Action
Walk through Weldo CNC's Dongguan facility — 100+ CNC machines, CMM inspection lab, surface finishing line, and packaging. See how a part moves from raw stock to inspected, finished, and shipped.
Material Capability
Breakdown
XC Machining CNC machines 60+ metals and engineering plastics for prototyping and production. Each material is selected for its mechanical properties, machinability, and application requirements.
Aluminum
6061, 7075, 2024
Stainless Steel
304, 316, 410, 420
Mild Steel
1018, 1045, A36
Tool Steel
D2, O1, H13
Brass & Copper
Brass C360, C464 | Copper H59
Plastics
PEEK, Delrin, Nylon, ABS, Polycarbonate, and 50+ others.
Titanium
Grade 2, Grade 5 (Ti-6Al-4V)
Surface Finishing Options
Sand Blasting
Removes tool marks to create uniform matte texture (Ra 1.6–6.3 µm).
Brushed Finish
Unidirectional satin grain pattern on aluminum / stainless steel (Ra 0.8–1.6 µm).
Anodizing
Type II & Type III hard-coat forming 5–80 µm protective oxide layer with custom colors.
Powder Coating
60–120 µm durable polymer layer with RAL color matching and UV resistance.
Polishing
Mirror polishing achieving Ra 0.05–0.4 µm surface roughness.
Electroplating
Deposits nickel, chrome, zinc, or gold for conductivity and corrosion protection.
CNC Machining Projects
We've Delivered
View All Case Studies±0.005 mm
BORE TOLERANCE HELD
Aerospace Structural Bracket
Ti-6Al-4V · Titanium Grade 5
Multi-face bracket with bearing seat bores referenced to three datum planes. Previous supplier couldn't hold concentricity across a 3-axis setup with manual repositioning.
Single-setup 5-axis machining eliminated datum error between faces. CMM report confirmed all features within tolerance on first article. Full material traceability with mill cert and heat number.
Aerospace Structural Bracket
Surgical Instrument Housing
Actuator Housing
Frequently Asked
Questions
Have a questions? We've made it easy. Here's what to know before ordering and what you are looking for feel free to ask/
Yes. XC Machining ships CNC machined and manufactured parts to 120+ countries via DHL, FedEx, and UPS with full tracking and customs documentation included.
Let's bring your
vision to life
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