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Your Integrated Manufacturing Partner


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.


One Partner. Multiple Manufacturing Capabilities.


Instead of managing multiple suppliers for different manufacturing processes, our customers can work with HJ-PRECISION as a single point of contact.

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.


Whether you need a single custom component or a complete assembled product, our goal is simple: to provide the right manufacturing solution for your project.




Custom manufacturing capabilities

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

     Engineering & Manufacturing Process

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

Quality Assurance & Testing Resources
Through our qualified manufacturing partner network, we coordinate dimensional inspection, functional testing and reliability validation according to project and customer requirements.

CNC Machining & Precision Parts


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


CAPABILITIES

CNC Machining


Mold Making & Injection Molding
PCBA & Electronics


Motor Solutions

Product Assembly


CONTACT US

✉ Email
jason@hj-precision.com
☎ Tel
+86 186 8103 8503
WhatsApp
+86 156 2558 1034
📍 Address
No. 6 Zhonghai Road, Binhaiwan New Area, Dongguan, Guangdong, China




© 2026 Dongguan Huajun Precision Technology Co., Ltd. All Rights Reserved.

HJ-PRECISION              

Integrated Manufacturing Solutions 

One Partner. Multiple Manufacturing Capabilities.     

Dongguan Huajun Precision Technology Co., Ltd.