About GD Prototyping (Dongguan Guanjie Precision Technology)

Founded in 2010 in Chang'an Town, Dongguan — one of China's most advanced manufacturing hubs — GD Prototyping has spent over 15 years building a reputation as a world-class contract manufacturer for precision parts. The business operates four production facilities covering more than 12,000 square metres, and its 300-strong team handles everything from a single prototype to thousands of finished components. The CEO brings nearly 20 years of expertise in precision plastic mould and machining, and that deep technical knowledge runs through the entire operation.

GD Prototyping serves global clients across the automotive, aerospace, medical devices, consumer electronics, and industrial automation sectors. Starting with Japanese customers in 2011 and expanding into European and North American markets from 2012, the company has grown a loyal international client base that returns year after year for consistently high quality, responsive project management, and competitive lead times. A dedicated project manager is assigned to every account, giving clients a single point of contact from first enquiry through to final delivery.

The business has invested continuously in equipment — adding 5-axis machining centres, Sodick EDM machines, and a Mikron CNC 5-axis system in recent years — so it can handle the complexity that other facilities turn away. If your product needs tight tolerances, intricate geometry, or a range of materials and finishes under one roof, GD Prototyping is set up to deliver.

What They Manufacture

• CNC Machined Parts: 3-axis, 4-axis and 5-axis milling and turning in aluminium, stainless steel, titanium, brass, and engineering plastics.
• Additive Manufacturing (3D Printing): SLA, SLS and DMLS processes for functional prototypes and complex geometries that are impossible to machine.
• Injection Moulding: Low-volume plastic parts using imported Fanuc machines, including bi-colour and overmoulding options.
• Die Casting: Aluminium and zinc alloy precision castings, scalable from hundreds to over 100,000 pieces.
• Sheet Metal Fabrication: Bending, punching, laser cutting, wire EDM, welding, and stamping with full surface finishing.

Why Source From GD Prototyping Through Epic Sourcing

Proven Global Track Record: GD Prototyping has supplied clients in Japan, Europe, and the Americas continuously since 2011 — this is not a first-timer in export.

One Facility, Many Processes: CNC, casting, moulding, sheet metal, and 3D printing all in-house means fewer handoffs and faster turnaround for complex assemblies.

Speed Without Compromise: Quotations within 6 hours and prototype delivery in as few as 7 days, with CMM inspection reports included as standard.

IP Protection Built In: The company operates a formal customer confidentiality policy for products still in development — your designs stay private.

Scalable from One to Thousands: MOQ starts at a single piece, making it ideal for product development, testing batches, and staged production ramp-ups.

Key Supplier Facts

• Founded: 2010
• Location: Chang'an Town, Dongguan, Guangdong Province, China
• Workforce: 300+ permanent engineering & manufacturing staff
• Factory: 12,000+ m² across 4 production facilities
• Equipment: 150+ machines including Mikron 5-axis CNC centres
• Export Markets: Japan (2011), Europe, Americas, and 20+ countries globally
• MOQ: 1 piece (prototyping); flexible volumes for production
• Lead Time: Quotation within 6 hours; prototype delivery 7–14 days typical
• Industry Sectors: Automotive, Aerospace, Medical, Consumer Electronics, Industrial Automation
• Materials: Aluminium alloys, stainless steel, titanium, brass, engineering plastics (PC, ABS, PEEK, nylon)
• Surface Finishes: Anodising, powder coating, sandblasting, electroplating, painting, polishing
• Quality Control: In-process CMM inspection, raw material certificates, full traceability from input to shipment
• Website: www.gd-prototypes.com

Factory Tour

Epic Sourcing can arrange an in-person factory visit or a live virtual tour of GD Prototyping's Chang'an Town facilities. This includes a walk-through of the CNC machining halls, the additive manufacturing room, mould shop, quality control lab, and finished goods warehouse. Virtual tours are conducted via video call with an English-speaking technical guide, and can be scheduled to fit your time zone. Get in touch with your Epic Sourcing contact to book.

Interested in Sourcing Precision Parts from GD Prototyping?

Epic Sourcing can manage the full sourcing process including factory visits, sampling, quality control, and freight. Book a free consultation to discuss your precision manufacturing sourcing requirements.