Your electronics manufacturing services (EMS) + CNC partner in China.

Nex-G · Electronics Manufacturing Services + CNC, since 2006 (Zhuohang) Your electronics manufacturing services (EMS) + CNC partner in China. Nex-G is first and foremost an electronics manufacturing services (EMS) company — we take your product from a bare PCB through SMT assembly, component sourcing, box build and testing, then machine the enclosure in our in-house CNC workshop. One supplier, one quality system, no minimum order quantity, from EVT to mass production. Request a quoteExplore EMS 6,000 pcs/hSMT placement speed on our prototype line 0.025 mmMounting-head placement precision 3 certsISO 9001 · IATF 16949 · ISO 14001 No MOQFrom a single board to a full production line Certified IATF 16949:2016131941/A/0001/SM/En ISO 9001:2015116024/A/0001/UK/En ISO 14001:2015116024/B/0001/UK/En Electronic manufacturing, end to end This is our core. We take responsibility for the electronics half of your product so you do not juggle five vendors and their finger-pointing. PCB / PCBAFabrication plus SMT and through-hole assembly, programming, testing and conformal coating.Details → Component sourcingSelection, availability and replacement evaluation, incoming QC, and MES tracking of every reel. Box buildPFMEA, simple and complex assembly, potting, ultrasonic welding, laser marking, traceability. TestingX-ray, stress, salt-spray, thermal-shock and vibration — documented, not assumed. SMT line capability, in numbers Prototype line: max PCB 280 × 280 mm, 4 mounting heads at 0.025 mm placement precision, 6,000 pcs/h, 5 heating zones, PID closed-loop temperature control. Mass production: max PCB 350 × 450 mm; supports RC (0402/0603/0805/1206), LED, and Chip (SOT/SOP/QFN/BGA); Yamaha feeders in 8/16/24/32 mm. Process flow: stencil printing → SPI → pick-and-place → reflow → AOI, with X-ray, stress, salt-spray, thermal-shock and vibration downstream. Testing that catches defects before you do Testing is a ladder where each rung catches what the one below missed: AOI (automated optical inspection) checks placement, polarity and solder joints against the board image. X-ray sees under BGAs and QFNs where optical inspection cannot reach. ICT / flying probe verifies continuity, shorts and component values electrically. Functional test powers the board and confirms it does the job, not just that it is soldered. Inspection runs to IPC-A-610, and every reel is tracked through MES so a suspect lot can be pulled in minutes, not days. Read the testing guide → Component sourcing that does not bite you later Most PCBA failures start before the board is built — a counterfeit part, an end-of-life chip, or a long-lead component nobody flagged. We source against availability and lifecycle, verify every reel on incoming QC, and surface replacement options before a part disappears. If a component is going end-of-life or constrained, you hear about it at the quote, not at the production line. How we de-risk the BOM → Precision CNC machining, in house The metal and plastic that holds your electronics together — machined under the same roof and the same quality system as the board, so enclosure and PCB meet in one facility instead of in a freight forwarder’s warehouse. Our CNC workshop runs 80+ machines — Mazak 5-axis centers, Brother machining centers, TSUGAMI Swiss-type lathes and Sodick wire EDM — holding ±0.005 mm on milling and turning and ±0.002 mm on grinding and wire EDM. CapabilityCountWhat it is for 3-axis machining50+Prismatic parts, plates, housings, brackets 4-axis machining20+Angled holes, indexing, multi-face parts in fewer setups 5-axis machining20+Complex geometry, tight true position, one-setup finishing CNC turning / Swiss25+Shafts, pins, connectors, high-volume turned parts Grinding / wire EDM7+±0.002 mm finishes, hard metals, sharp internal corners We machine aluminum, stainless steel, titanium, brass and engineering polymers, and verify every incoming lot against its mill certificate with XRF before it reaches a spindle — so the alloy on your drawing is the alloy in the part. See CNC services → Read the measured capability baseline → Materials and finishes, matched to the job Material choice drives cost, weight, corrosion and finish — we help you pick the cheapest alloy or polymer that meets the requirement rather than over-specifying. The workhorses: Aluminum (6061, 7075, 5052, 2024) — light, machinable, anodizes cleanly; the default for enclosures and brackets. Stainless steel (303, 304, 316, 17-4 PH) — corrosion resistance and strength where the environment is harsh. Titanium (Grade 2, Grade 5) — best strength-to-weight, for aerospace and medical; costs more to machine. Brass & copper — conductivity and machinability for connectors and thermal parts. Engineering polymers (PEEK, ULTEM, Delrin, nylon) — insulators and light-structural parts, machined or molded. Finishing covers anodizing (Type II and III), passivation, electropolishing, plating, powder coating, bead blasting and brushing — with the tolerance effect of each finish accounted for before you spec it. Material properties are cross-checked against the ASM Handbook and MatWeb. Read the materials guide → One supplier, one throat to choke The hidden cost of a multi-vendor build is coordination: the board shop blames the enclosure shop, the enclosure shop blames the finish vendor, and you pay in weeks and rework. When EMS and CNC sit in one facility under one quality system, the blame loop disappears — the PCB, the metal, the cables and the final assembly are one accountable deliverable. That is the structural reason we pair them. Concretely: a PCB that is 0.3 mm too tall for its enclosure is a rework on our bench, not a three-week remachining cycle across an ocean. The connector that does not seat, the cable that is too short, the standoff in the wrong place — each is caught where it costs minutes instead of weeks. That is the economics of co-locating the board and the box. The real factory Actual photographs from the Nex-G (Zhuohang) facility in Dongguan — the SMT line, the CNC workshop and the inspection room. No stock footage, no renderings. SMT pick-and-place line CNC machining center SMT production line CMM dimensional verification Assembled electronic product Everything else, through vetted partners Not every part is machined or assembled in-house — and it should not be. For the processes that do not fit our floor, we run a vetted partner network and manage the interface so you still hold one supplier accountable for the whole product: Injection molding & vacuum casting — high-volume plastics and low-volume silicone/urethane parts. 3D printing — fast prototypes and low-volume end-use parts. Metal stamping, extrusion & casting — sheet-metal and die-cast enclosures and brackets. Batteries & harness/cable assembly — power and interconnect, sourced and QA-managed. Industries we build for The same EMS + CNC floor serves very different buyers — what changes is the certification depth, the documentation and the inspection plan, not the discipline. AutomotiveIATF 16949 process control, APQP/PPAP packages and PFMEA. EMS · CNC MedicalLot-level traceability and validated processes. EMS · CNC RoboticsTight tolerance stacks and mechatronic enclosures. EMS · CNC IndustrialRugged, long-life hardware built to last. EMS · CNC See all industries → What stays the same across all of them: incoming verification, first-article inspection, SPC on key characteristics, and lot-level traceability. What changes is the documentation depth — an automotive program gets the full APQP/PPAP package, a medical device gets validated processes and full traceability, a robotics build gets tight tolerance-stack control, and an industrial build gets rugged, long-life validation. See how we serve each industry → Why Dongguan, and why it matters to your build Dongguan sits in the densest electronics and precision-machining ecosystem in the world. A PCB fabricator, a component distributor, a CNC shop and a surface finisher are all a short drive apart — which collapses the two hidden costs of hardware: time and coordination. A design change that takes weeks across continents takes days here, and that iteration speed is what decides a product launch. Read why Dongguan → Buyers who type "china factory" or "ems company" into a search box are usually asking the same question: is there one accountable partner who can take a design from prototype to shipment without me managing five vendors? That is what our factory is built to answer — a single roof, one quality system, no minimum order quantity. See the factory → Three lead-time tiers tell the story: ~3 days for a simple prototype, ~7 days for a multi-operation part, ~30 days for a complex build with secondary processes — all with no minimum order quantity. We confirm a real bracket against your drawing, not a brochure number. How no-MOQ works → Why choose Nex-G Six reasons buyers move to us and stay — in the order they actually matter when a build goes wrong. 1. One supplier, one throat to chokeEMS and CNC run under one roof and one quality system, so the board, the enclosure and the final assembly are a single accountable deliverable — not a finger-pointing contest across three vendors. 2. No minimum order quantityStart with a single prototype board or a single part. The line is built for small runs that scale, so you never pay a setup penalty for starting small. 3. Quality you can verifyCertificate numbers you can look up with the registrar, and critical characteristics held to Cpk ≥ 1.67. We name our numbers instead of asking you to trust them. 4. Built in the world’s densest supply chainDongguan puts a PCB fabricator, a component distributor, a CNC shop and a finisher a short drive apart — so iteration takes days, not weeks. 5. A partner who speaks your languageFelipe and the team work in English, Japanese, Portuguese, Spanish, French and Mandarin — no lost nuance between your spec and the shop floor. 6. EVT → DVT → PVT, done properlyWe sign off tools, workflow and documentation at each gate so mass production starts clean — the fastest path to market is not skipping gates, it is running them in the right order. Why manufacture in China — the honest math The headline is cost, but the real reason is density and speed. China still holds roughly 30% of global manufacturing value added, concentrated in clusters where a design change that costs weeks across continents costs days in Shenzhen or Dongguan. Wages have risen — the difference that remains is the supply chain, the tooling base and the iteration loop, not just the hourly rate. Tariffs are the counterweight you must price in. US-bound electronics from China face an effective rate near 37.5% (a 12.5% Section 301 forced-labor base plus a 25% Section 301 product tariff) as of August 2026, and steel/aluminum draw additional Section 232 duty. The right frame is landed cost, not unit price — model the full number before you compare China against a near-shore option. The honest trade-off: near-shore gives you shared time zones, shorter freight and tariff relief under USMCA; China gives you depth, tooling and iteration speed. If your product is complex, precise or still changing, the depth usually wins; if it is simple, high-volume and US-bound, near-shore may win on landed cost. We will tell you which — even when the honest answer is not us. Mexico vs China, the full comparison → What drives your cost — EMS and CNC Knowing the cost structure lets you cut it. For EMS, the bill of materials is usually 60–90% of unit cost — so component selection and sourcing matter more than assembly rate. For CNC, cost is driven by material, machine time, setups, the tolerance you ask for, and finishing — tightening a tolerance from ±0.1 mm to ±0.005 mm can multiply cost. We show you where the money goes in the quote, so you can push it back down. EMS cost → CNC cost → Your supply chain, managed either way Turnkey means we buy the components, manage the BOM and own the outcome; consignment means you supply parts and we assemble. Either way we consolidate long-lead items, flag single-source risk and obsolescence, and keep lot-level traceability from reel to shipment. Read the supply-chain guide → How we work: EVT → DVT → PVT We walk your product through three validation gates, signing off tools, workflow and documentation at each one so mass production starts clean — and so the fixes stay where they are cheap. 1EVT — Engineering ValidationPrototype boards and parts prove form and fit. We machine to your CAD, XRF-verify the material, and flag DFM issues while they are still a drawing change, not a tooling change. 2DVT — Design ValidationThe design is locked against a control plan and a PFMEA, and first SPC baselines are recorded. Risk is closed before any tooling is committed. 3PVT — Production ValidationThe process is proven at production rate — control plan and PFMEA locked, Cpk demonstrated on key characteristics, and the PPAP package assembled. This is why we can offer no minimum order quantity: the line is built for small runs that scale through the same gates. Read the full three-gates guide → Quality you can hold to a certificate number ISO 9001:2015, IATF 16949:2016 (automotive-grade process control) and ISO 14001:2015, backed by a QC department with 20+ instruments — CMM, X-ray, XRF spectrometer, hardness and roughness testers. We publish the certificate numbers — 116024/A/0001/UK/En, 131941/A/0001/SM/En, 116024/B/0001/UK/En — so you can verify them with the registrar (ISO 9001, IATF 16949, ISO 14001). We hold key characteristics to Cpk ≥ 1.67, with a real measured result above 1.67 on a production part. See the proof → One honest boundary: our IATF 16949 scope excludes Clause 8.3 (product design). We build to your drawing and your control plan — the design-responsible role stays with you. Compliance, not an afterthought Beyond the three ISO certificates, we build to the standards your market requires — RoHS and REACH for the EU, and the documentation for your customs entry. ISO 14001 is operational, not decorative: rooftop solar generates about 20,000 kWh a month, and documented procedures cover noise, wastewater and air emission. Labor compliance is written — no forced or child labor, contracts on hire, full social insurance. Read the quality system → Traceability from reel to shipment Every lot carries a record: the component reels and the metal stock it came from, the machines and operators that ran it, and the SPC and inspection data attached to the batch. If a dimension drifts or a lot is suspect, we pull the record instead of guessing. The inspection floor backs it with 20+ instruments — Hexagon GLOBAL S CMMs, KEYENCE laser microscope, SURFCOM roughness comparator, iCHEQ XRF and a micro-Vickers hardness tester. See the full instrument list → Quality control, three checkpoints Inspection is not a final gate — it runs at three points so defects are caught where they are cheap to fix: IQC (incoming): every reel and every metal lot is checked against the certificate — XRF verifies the alloy, incoming QC verifies the components. IPQC (in-process): first-article inspection on every setup, and SPC sampling on key characteristics during the run, so drift is caught before it becomes scrap. FQC (final): CMM reports on critical features, functional test on the board, and a lot record that ties the part back to its material and process. What a quote from us actually contains Send a BOM or a STEP/IGES model and you get back more than a price: a DFM note flagging the features that will drive cost or fail, a lead-time bracket, the tolerance we will hold, and — where we can — the specific change that cuts the part's cost. That is the difference between a vendor and a manufacturing partner. Request a quote → How we earn trust: show, do not tell Trust in manufacturing is earned with evidence, not adjectives. On request we provide the certificate scans and scope statements, a sample FAI / PPAP from a comparable program, and the SPC data behind the numbers on this page. You can visit the factory in Dongguan or audit remotely with live video — we would rather prove the claim than ask you to believe it. See what we will show you → Support that keeps answering after the order A manufacturing partner’s job does not end at the packing line. We track the shipment, handle customs documentation under the Incoterms you choose, and stay reachable in your time zone for engineering changes, reorders and field issues. When a dimension needs to change or a component goes obsolete mid-program, you get an engineering answer, not a ticket number. Talk to us → Frequently asked questions What is EMS, and why pair it with CNC?EMS (electronics manufacturing services) covers PCB assembly, component sourcing, box build and testing. We pair it with in-house CNC so the enclosure and the board are one accountable deliverable instead of two vendors pointing at each other. How do you protect my IP?Customer files are stored on locked, encrypted storage with access control, we sign an NDA on request before you share anything, and we dispose of files responsibly at end of program. How is an EMS quote different from a CNC quote?An EMS quote is driven by the BOM — component cost, placement, test coverage and box build. A CNC quote is driven by material, machine time, setups, tolerances and finish. When both run here, they arrive as one consolidated quote with one DFM note. Can you handle tariff and compliance paperwork?We provide full traceability, certificates of origin and the documentation your broker needs. Tariff classification is fact-specific — we work with your customs broker on the correct HTS line and any Section 301/232 treatment. What is your minimum order quantity?One piece. We run a no-MOQ model, so a single prototype board or a single machined part goes through the same workflow as volume production. How fast can you ship?Three planning tiers: ~3 days for a simple prototype, ~7 days for a multi-operation part, and ~30 days for a complex build with secondary processes. We confirm a real bracket against your drawing. What certifications do you hold?ISO 9001:2015, IATF 16949:2016 and ISO 14001:2015, issued by URS. The certificate numbers are published on our quality page so you can verify them directly. Do you take product-design responsibility?No. Our IATF 16949 scope excludes Clause 8.3 (product design). We build to your drawing and control plan; you keep the design-responsible role. Can you do EMS and CNC in one order?Yes — that is the point. PCBA, box build and the machined enclosure run under one roof and one quality system, so one supplier is accountable for the whole product. What materials do you machine?Aluminum, stainless steel, titanium, brass and engineering polymers, verified against the mill certificate by XRF before machining. What is the difference between prototype and mass production?The gates, not the line. A prototype runs through EVT with DFM feedback; mass production is the same process after DVT and PVT have locked the control plan and proven the yield. You do not hand off between a prototype shop and a production shop — it is one line that scales. Do you provide samples before volume?Yes — first articles and pre-production samples with a first-article inspection report, so you approve the fit and finish before we commit the run. What does manufacturing in China mean for lead time?It means the whole chain — PCB, components, machining and finishing — sits close enough to run in days rather than weeks. We confirm a real bracket against your part, not a brochure number. Ready to build?Send your BOM or STEP/IGES model to [email protected] — you get a quote, a DFM note, and a lead time.Request a quote