Your Parts, Made Right — Direct from Our Factory
CNC Machining & Free DFM Review — Direct Factory
Direct Factory Savings: Free DFM review within 12 hours — we check your design BEFORE quoting
Fast Quotes: 1 to 10,000 parts. No minimum order. ISO 9001:2015 certified.
Quick Delivery: CMM inspection report with every shipment. Visit our factory anytime.
12+
Years of Experience
40+
Team Members
3500+
Project Completed
98%
Satisfied Customer
Your Trusted Engineering Partner — Direct Factory, ISO 9001 Certified
12 years of in-house CNC machining. QDJ is a direct manufacturer, not a trading company. Our 50+ CNC machines run 24/7 in our Dongguan factory — you can visit us anytime. ISO 9001:2015 certified. No middlemen, no outsourcing roulette. Your parts are made here, tracked here, and shipped from here.
Our facilities
At QDJ-PROTOTYPE, we use advanced equipment to ensure high-quality, precise products. Our machines include CNC machining centers, 3D printers, laser cutters, and quality testing tools from trusted brands like Mazak, Haas, and TRUMPF. With tight tolerance control and careful inspection, we deliver accurate prototypes and parts to meet your needs.
Industries We Serve — From Medical to Aerospace
Tailored Prototyping Services for Every Industry’s Unique Challenges and Needs
Medical Devices
Automotive Industry
Consumer Electronics
Education & Training
Trusted by R&D Groups Worldwide
More than1890 companies from 96 countries trust us, and the number is growing.
We Review Your Design Before We Quote
01
Upload a CAD File
Upload your 3D CAD file. STEP, IGES, or native SolidWorks format accepted.
02
Free DFM Review & Quote
Our engineers review your design for manufacturability. We ask technical questions before quoting — if we spot issues, you will know.
03
Order Confirmed
Confirm your order. Production starts immediately in our Dongguan factory, not outsourced.
04
Parts are Shipped
Parts shipped to your door with full CMM inspection reports. Track your order in real time.
Engineering Problems Solved — Real Results
Every project comes with challenges. Here are a few we have helped our clients overcome.
5 Iterations in 3 Weeks
A hardware startup needed rapid design changes. We caught a tolerance issue in v2 that would have broken their investor demo. Result: Demo worked first try.
Read the case →DFM Review Saved $12,000
About to cut an injection mold, a product team sent us their CAD. We found interference the mold maker missed. Result: $12,000 saved.
Read the case →8 Months, Zero Issues
A German founder managed manufacturing remotely. Weekly QC reports made distance irrelevant. Result: Zero returns, zero delays.
Read the case →What Our Clients Say
5 Clients. 5 Industries. Same Answer.
★★★★★
They’re fast, communicative, and really understand startup constraints.
Hardware Startup Founder, USA
★★★★★
QDJ pointed out manufacturability issues and suggested improvements, saving us time and cost.
Product Engineer, Germany
★★★★★
They made an overseas project feel local — super responsive and helpful.
Cross-Border Entrepreneur, UK
★★★★★
They handle unusual materials and custom designs that other suppliers refused.
Maker & Creator, Canada
★★★★★
Consistent quality and reliable delivery across every batch — zero surprises.
Enterprise Procurement Lead, Australia
