Precision CNC Machining
Services Vietnam
VNcontX delivers tight-tolerance CNC machined parts in aluminum, stainless steel, titanium, and engineering plastics — CMM-verified to ±0.005mm with Cpk ≥ 1.67. 100% FAI report every order. No minimum order quantity. Lead time from 5 business days. Zero-Defect Protocol. No deviation. No exception.
Why choose VNcontX for precision CNC →
CNC Machining Vietnam —
Built for US & Australian Buyers
Bình Chánh facility. Founder-led inspection. Every part CMM-verified before it ships.
Capabilities & Standards
- DMG Mori 5-axis + Mazak QT — simultaneous 5-axis milling and live-tooling turn-mill under one roof.
- ±0.005mm standard / ±0.003mm precision — Zeiss Contura + Mitutoyo CMM, Cpk/Ppk live data per lot.
- 100% FAI report on every order — not sampling. Every lot cleared before shipment.
- No MOQ — 1 FAI sample to 10,000-unit runs. Same quality protocol throughout.
- Section 301 tariff-free — 0% vs 25–145% on Chinese goods. Landed cost 30–40% lower.
- DFM review on every order before production — no surprises at final inspection. See our DFM guidelines for CNC machining for the 12 rules we check on every drawing.
- Surface finishing in-house: Anodize Type II/III, Hard Chrome, ENP, Passivation, Laser Marking.
- Air freight LAX 2–3 days · Sea freight US West Coast 18–22 days · Sydney 8–12 days.
CNC Machining Processes — Vietnam Facility
CNC Machining Materials — Metals & Engineering Plastics
Select a material to view specifications, tolerances & available finishes.
Aluminum
Most commonly machined metal — excellent strength-to-weight ratio and outstanding machinability. 6061-T6 for structural parts and enclosures; 7075-T6 approaches steel strength for aerospace and high-load applications. See our aluminum grade selection guide for a full property and cost comparison. Both machine fast with superior surface quality under VNcontX’s Zero-Defect Protocol.
Stainless Steel
Outstanding corrosion resistance with high strength. 303 optimized for machined fittings; 316L excels in marine and medical environments; 17-4 PH precipitation-hardened for aerospace. All grades CMM first-article inspected under Zero-Defect Protocol.
Steel
Workhorse of precision machining — exceptional strength, weldability, and heat-treat response. 1018 for structural components; 4140/4340 chromoly for shafts and gears; A36 for structural fabrication. Full material traceability on every order.
Brass
Free-machining brass — fastest chip formation of any metal, ideal for fittings, valves, and electrical connectors. C360 benchmark for machinability; C260 cold-working capability; C464 naval brass marine-grade corrosion resistance.
Delrin (POM)
Acetal resin — best combination of stiffness, low friction, and dimensional stability of any unreinforced thermoplastic. Ideal for gears, bearings, bushings, and precision sliders. Machines cleanly with exceptional surface finish.
PEEK
Premier high-performance polymer — continuous use to 250°C, chemical resistance, mechanical properties approaching aluminum at a fraction of the weight. For aerospace brackets, medical implant components, and semiconductor tooling. No deviation. No exception.
Titanium
Steel-strength at 40% less weight — exceptional biocompatibility and corrosion resistance. Ti-6Al-4V (Grade 5) standard for aerospace structures and orthopedic implants. Grade 23 (ELI) meets ISO 5832-3 for implantable medical devices.
ABS / PC
ABS for housings, enclosures, and functional prototypes. Polycarbonate for optical clarity and near-unbreakable impact toughness — lenses, guards, display components. ABS-PC blend merges both: high-temperature resistance with ductility.
Full material & quality reference — Click to expand the complete engineering materials datasheet or VNcontX cosmetic inspection standards.
| MATERIAL | COMMON GRADES | LEAD TIME | FINISHING OPTIONS |
|---|---|---|---|
| Aluminium | 6061-T67075-T65052 | 5–7 Days | Anodizing (Type II/III), Sandblasting, Polishing |
| Steel / Stainless | 1045S45CSS304SS316 | 7–10 Days | Passivation, Electropolishing, Plating, Black Oxide |
| Tool Steel | SKD11 (D2)SKD61 (H13) | 7–12 Days | Hardening, Black Oxide, Grinding |
| MATERIAL | KEY PROPERTIES | LEAD TIME | COMMON USES |
|---|---|---|---|
| Delrin (POM) | Low friction, high stiffness | 5–7 Days | Gears, bushings, precision rollers |
| PEEK | Chemical & heat resistance | 7–10 Days | Medical, oil & gas, high-temp parts |
| Polycarbonate | Impact resistance, optically clear | 5–7 Days | Guards, housings, transparent covers |
| Nylon (PA6/PA66) | Wear resistance, lightweight | 5–7 Days | Structural brackets, wear pads |
| DIMENSION | METALS (CNC) | PLASTICS (CNC) | STANDARD |
|---|---|---|---|
| Linear | ±0.005 mm | ±0.01 mm | ISO 2768-m / GD&T |
| Angular | ±0.1° | ±0.2° | ISO 2768-m |
| Surface Roughness | Ra 0.8–3.2 µm | Ra 1.6–3.2 µm | ISO 1302 |
| Cpk / Ppk Target | ≥ 1.67 — Zero-Defect Protocol | AIAG SPC | |
| PROCESS | MATERIAL | THICKNESS | STANDARD |
|---|---|---|---|
| Hard Anodize (Type III) | Aluminium | 25–50 µm | MIL-A-8625F |
| Electroless Nickel | Steel, Aluminium | 5–25 µm | ASTM B733 |
| Passivation | Stainless Steel | — | ASTM A967 / AMS 2700 |
| Black Oxide | Steel, Tool Steel | 1–2 µm | MIL-DTL-13924 |
| GRADE | DESCRIPTION | TYPICAL APPLICATION | INSPECTION METHOD |
|---|---|---|---|
| A — Premium | No visible marks, scratches, or tool paths. Mirror or brushed uniform finish. | Exposed consumer surfaces, medical housings, optical mounts | 100% visual + Ra measurement |
| B — Standard | Minor uniform tool marks allowed. No deep scratches, burrs, or pitting. | Structural enclosures, industrial fixtures, semi-exposed faces | Sampling AQL 1.0 |
| C — Functional | Tool marks accepted. No burrs or sharp edges. Cosmetics secondary. | Internal brackets, hidden structural parts, prototype iteration | Dimensional check only |
| DEFECT TYPE | GRADE A | GRADE B | GRADE C | MEASUREMENT |
|---|---|---|---|---|
| Scratch / Score | REJECT | < 5mm, 1 max | Accepted | Visual, 10× loupe |
| Tool Mark / Witness | REJECT | Uniform only | Accepted | Raking light inspection |
| Burr / Sharp Edge | REJECT | REJECT | REJECT | Touch test + radius gauge |
| Pitting / Porosity | REJECT | REJECT | < 0.3mm dia. | 10× loupe, profilometer |
| Dent / Ding | REJECT | REJECT | < 0.1mm depth | Depth gauge |
| Discolouration | REJECT | Non-exposed only | Accepted | Visual, Pantone match |
| Machining Chatter | REJECT | Ra < 1.6 µm | Accepted | Profilometer |
| FINISH PROCESS | Ra TARGET | Rz MAX | STANDARD |
|---|---|---|---|
| As-Machined | Ra 1.6–3.2 µm | Rz 12.5 µm | ISO 1302 N7–N8 |
| Fine Machined | Ra 0.8–1.6 µm | Rz 6.3 µm | ISO 1302 N6 |
| Brushed / Bead Blast | Ra 0.4–1.6 µm | Rz 4.0 µm | VNCONTX-VQ-02 |
| Hard Anodize (Type III) | Ra ≤ 0.8 µm | Rz 3.2 µm | MIL-A-8625F |
| Polished / Mirror | Ra ≤ 0.2 µm | Rz 0.8 µm | ISO 1302 N4 |
| NO. | CHECKPOINT | TOOL | ACCEPT CONDITION |
|---|---|---|---|
| 01 | All sharp edges deburred | Touch test | No detectible edge ≥ 0.05mm |
| 02 | Surface finish uniform | Raking light | Per grade spec above |
| 03 | Ra confirmed | Profilometer | Per finish process target |
| 04 | No coolant stain | Visual | Grade A/B: zero |
| 05 | Anodize uniform colour | Pantone / visual | ΔE < 2.0 |
| 06 | Threads clean | Go/No-Go gauge | Full pass both gauges |
| 07 | Part ID legible | Visual | CO/CQ traceability confirmed |
How VNcontX Processes Your CNC Order — 10 Steps
Every CNC machining order follows the same protocol — prototype or production run.
CNC Machining Vietnam — FAQ
Everything engineers and procurement managers ask before placing an order.
Standard: 7–12 business days from drawing confirmation. Expedited 5–7 days available on request, subject to capacity. Rapid CNC prototyping (FAI samples) ships in 3–5 days. For a full breakdown of every phase — DFM, material procurement, finishing, and transit — see the CNC machining lead time from Vietnam guide. No deviation. No exception.
Standard GD&T: ±0.005mm. Precision: ±0.003mm with Cpk ≥ 1.67 — achievable on 5-axis CNC and wire EDM. Surface finish Ra 0.8μm standard, Ra 0.4μm fine. All parts CMM-inspected (Zeiss Contura + Mitutoyo) before shipment.
Aluminum (6061-T6 / 7075-T6 / 5052), Stainless Steel (303 / 304 / 316L / 17-4 PH), Carbon & Tool Steel (1018 / 4140 / 4340), Titanium (Grade 2 / Grade 5 / Grade 23), Brass (C360 / C260 / C464), and engineering plastics (POM / PEEK / PC / ABS). Additional alloys on request.
3-axis and 4-axis CNC milling, 5-axis simultaneous machining (DMG Mori), CNC turning (Mazak QT), mill-turn, and wire EDM for hardened tool steel up to 62 HRC. All under one ISO 9001:2015 certified facility in Bình Chánh, Ho Chi Minh City.
Vietnam-origin goods ship to the US at 0% Section 301 tariff — vs 25–145% on Chinese-origin CNC parts. Combined with Vietnam’s lower labor costs, landed cost saving for US buyers is typically 30–40% vs China. See: CNC machining Vietnam for US companies.
No minimum order quantity. We machine from 1 FAI sample to 10,000-unit production runs under the same Zero-Defect Protocol. For prototype work see rapid CNC prototyping Vietnam.
Yes — complimentary DFM review on every order before production commitment. Common flags: wall thickness, internal radii vs tool diameter, turning vs milling selection, and finish stock allowance for heat-treat parts. Quote issued within 24 hours of file receipt.
ISO 9001:2015 certified. 100% CMM inspection + FAI dimensional report on every order. Cpk ≥ 1.67 process target. PDCA continuous improvement cycle. For flight-critical parts, see our aerospace CNC machining guide.
NDA signed before any file transfer. All drawings and design data treated as strictly confidential. Files are never shared outside the production workflow. No deviation from this policy. No exception.
Air freight to LAX: 2–3 business days. Sea freight US West Coast: 18–22 days. Air freight to Sydney: 3–5 days. Cat Lai Port and Tan Son Nhat Airport both within 25km of our Bình Chánh facility. For Australian buyers: CNC machining Vietnam for Australia and our CNC machining supplier Vietnam Australia guide.
Ready to Source CNC Machined Parts from Vietnam?
Send your drawings and receive a technical quote within 24 hours. ±0.005mm tolerance, 100% CMM report, Section 301 tariff-free. No deviation. No exception.
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