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HJ-PRECISION provides integrated manufacturing solutions for custom parts and products, supporting global customers from engineering review and prototyping to production, assembly and delivery.
Through our network of long-term strategic manufacturing partners, we integrate specialized capabilities across CNC machining, tooling, injection molding, sheet metal, PCBA, motors and product assembly.
We coordinate engineering, sourcing, production, quality control and delivery across the project, helping customers simplify their supply chain and manage customized manufacturing projects more efficiently.
From individual components to complete assemblies, we support customized manufacturing based on your drawings, specifications and project requirements.


Injection Molding & Plastic Parts
Custom Plastic Parts · Over-molding · Optical Parts
Workshop gallery
Integrated manufacturing resources across our qualified long-term partner network
CNC Machining · Mold Making · Injection Molding · SMT/PCBA · Surface Treatment · Assembly
Automotive & Mobility
Ambient Lighting · Interior & Exterior Components · Optical Parts · Electronic Modules · Motor Components
Industrial & Automation
Precision Machined Parts · Gears & Shafts · Motors · Mechanical Components · Automation Parts
Consumer & Smart Products
Plastic Enclosures · PCBA · Electronic Components · Mechanical Parts · Product Assembly
Electronics & Electrical
PCBA · Control Boards · FPC · Electronic Modules · Functional Testing

From engineering review to manufacturing, testing and final integration, we support customers throughout the product development process







CNC Turning · CNC Milling · Gears · Shafts · Precision Components

PCBA & Electronics
SMT · DIP · PCBA Assembly · Automotive Electronics · Functional Testing

Motor Solutions
PMSM Motors · BLDC Motors · Motor Components · Custom Development




CNC Machining
Motor Solutions
Product Assembly
HJ-PRECISION
One Partner. Multiple Manufacturing Capabilities.
Dongguan Huajun Precision Technology Co., Ltd.