From DFM engineering to finished parts — CNC turning, 3-axis, 5-axis milling and surface treatment under one roof. ISO 9001 & IATF 16949 certified. Expert in aluminum, stainless, brass & engineering plastics for audio, 3C electronics and industrial applications.
Missed deadlines, silent suppliers, quality drift — we solve the problems that actually keep procurement managers up at night.
Every batch ships with CMM first-article reports, in-process probing and dimensional inspection — not just "OK, shipped."
200+ owned CNC machines in Dongguan. Your order isn't passed between brokers — we control scheduling, tools and capacity.
No sales rep chasing quotes. A DFM engineer reviews your CAD, flags issues and sends a detailed quote — often same day.
One roof: CNC machining, surface treatment and assembly. You pay for actual manufacturing, not three layers of suppliers.
Rejin CNC delivers tight-tolerance CNC machined housings, brackets and structural components across audio, consumer electronics, automotive and thermal management. Our IATF 16949 certified shops hold ±0.005 mm tolerance with in-house anodizing and CMM inspection — from rapid prototype to stable mass production.
One-stop CNC machining: turning, milling, 5-axis machining and surface finishing under one roof. In-house anodizing, sandblasting and full-lifecycle QC — no middlemen, no quality drift between suppliers.
Functional and cosmetic finishes applied in-house or through vetted partners.
Type II protective anodize, natural silver finish.
Type III hard coat, wear-resistant black.
Blue, red, gold, green dye for audio and 3C.
Uniform matte texture, hides machining marks.
Durable corrosion-resistant RAL colors.
Removes free iron, boosts stainless corrosion.
Zinc, nickel, chrome, tin for connectors.
Permanent non-contact logos and serials.
Every batch ships with the documentation your QA team needs — and our engineers stand behind it.
Full dimensional reports on the first part and at key production milestones.
Mill certificates and lot tracking on every raw material we receive.
Signed before quoting. Encrypted storage, files never reused or shared.
Automated in-machine measurement reduces human error and scrap.
In-house stock for 8 engineering alloys lets us start your job in days — not weeks — while holding ±0.005 mm critical tolerances.
Factory Tour
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Walk our Dongguan floor — real machines, real team, no middlemen. Open to visit and audit.
Rejin CNC is an engineer-owned CNC machining factory in Dongguan, China — not a trading company. Since 2003, our in-house team has manufactured custom precision parts directly for global OEMs, so you deal with the people who actually run the machines: no broker margins, no finger-pointing, one accountable team from first quote to final shipment.
Every order is backed by FAI reports, material certificates and full lot traceability, with processes proven from rapid prototyping to repeat mass production. The result is the consistent quality, on-time delivery and engineering responsiveness that offshore sourcing usually promises but rarely delivers.
200+ CNC machines, an in-house QC lab and a full finishing line — all under one roof in Dongguan.
For any questions on custom CNC fabrication, quote evaluation and manufacturing cooperation, please contact us anytime. Our dedicated team delivers timely responses for all your demands.
Every successful product starts with a manufacturability check. Upload your CAD file to instantly receive automated DFM analysis on key factors like geometry, tolerances, and wall thickness. For critical projects, our engineers perform a detailed manual review within one business day, providing clear, actionable recommendations on design adjustments, materials, and processes to ensure quality and avoid delays.
We combine in-house manufacturing with a vetted partner network under strict quality standards. Unlike intermediaries, we provide integrated engineering support, from prototyping to full-scale production and packaging. With dedicated project management and a focus on industries like automotive, medical, and electronics, we ensure reliability, consistency, and seamless scale-up for every order.
Lead time is determined by part complexity, production volume and required manufacturing processes.
Rapid CNC & 3D printed prototypes can be delivered within 2–5 working days.
Small-batch serial production generally takes 2–4 weeks.
Send us your design drawings and specifications, and we will provide you with an accurate quotation together with a definitive delivery schedule.
We provide instant online quotes for standard manufacturing services. Simply upload your 2D or 3D files and select your preferred process, material, finish, and quantity. If your project is more complex, a dedicated engineer will reach out within one business day to review your requirements and prepare a customized proposal.
Yes, we accommodate engineering change requests wherever possible. Minor adjustments during the prototyping stage are generally straightforward, while changes during mass production may affect cost and lead time. Our team will provide a clear impact assessment and assist you in implementing changes with minimal disruption.
We support common 2D and 3D formats, including STEP, STL, IGES, X_T, DWG, and PDF. For best results, please upload complete, dimensioned drawings and specify critical tolerances, surface finishes, and material preferences in your notes.
For prototyping and low-volume orders, we offer no MOQ so you can order as few as one part. For injection molding and large-scale production, MOQ depends on the tooling and process—our team will provide a detailed breakdown during quoting.
We are ISO 9001:2015 and IATF 16949 certified quality management systems. We can also provide material certifications, FAIRs, and third-party inspection reports upon request.
Your message lands directly with our senior engineers — instantly acknowledged.
We study your requirements and propose a workable solution with material & process options.
Detailed quotation with specs, options and lead time — no hidden fees.
Approve the sample, then we mass-produce with full QC and on-time shipping.
WhatsApp: +86 18362358467
Email: info@rejincnc.com
Scan this QR code with your WeChat app to add us as a contact — send drawings, get quotes within 24 hours and chat with our engineers directly.
Your CAD files are kept strictly confidential. Quotation within 24 hours.
