Precision CNC Machining for Automation, Auto Parts & Components

About OPTCJ Machining

Dongguan OPTCJ Machining Co., Ltd. was founded in 2011 and is located in ChangAn, Dongguan – one of China’s most advanced industrial cities. We are a professional manufacturer specializing in precision CNC machining parts, serving industries such as medical, communications, photoelectric, automotive, and automation.

Our expertise lies in CNC turning, CNC milling, and complex custom parts processing. We work with a wide range of materials including stainless steel, aluminum, copper, PEEK, nylon, PTFE, bronze, and alloy steels. With in-house capabilities in surface treatments like anodizing, black oxide, powder coating, high polishing, and plating, we deliver fully finished components ready for integration.

Established in 2011 in Dongguan, China
Specializing in precision CNC turning & milling
Custom machining for medical, auto, and communication industries

Our Product Lines

We deliver high-precision, custom-engineered components across multiple industries using advanced CNC technology and strict quality control.

Precision Metal Parts

Custom high-precision metal components machined from stainless steel, aluminum, copper, alloy steel, and more. Ideal for industrial and automation applications.

Materials: Steel, Aluminum, Brass, PEEK
Processes: CNC Turning, Milling
Surface: Anodizing, Polishing, Plating

Rapid Prototyping

Fast-turnaround prototyping services including SLA/SLS, vacuum casting, and CNC precision machining for product development and testing.

Technologies: SLA, SLS, CNC, Vacuum Casting
Lead Time: As fast as 3–5 days
Materials: ABS, Nylon, PEEK, Resin

Medical Components

High-precision CNC machined parts for medical devices and equipment, meeting strict quality and hygiene standards.

Materials: Stainless Steel, Titanium, PEEK
Tolerances: ±0.005mm
Applications: Surgical Tools, Implants, Sensors

Automotive Parts

Custom CNC machined components for automotive systems including sensors, housings, brackets, and transmission parts.

Materials: Aluminum, Steel, Bronze
Processes: 3–5 Axis CNC Milling
Surface: Anodize, Powder Coating

Communication Parts

Precision-machined enclosures, connectors, and heat sinks for telecom and networking equipment.

Materials: Aluminum, Copper, Brass
Features: EMI Shielding, Thermal Management
Finishes: Anodizing, Plating

Photoelectric Components

High-accuracy parts for optical and photoelectric systems, including lens mounts, sensor housings, and alignment fixtures.

Materials: Aluminum, Stainless Steel
Tolerances: ±0.002mm
Applications: Lasers, Sensors, Cameras

Precision Fixtures

Custom-designed fixtures for optics, automotive, and electronics assembly to improve precision and efficiency.

Applications: Assembly, Testing, Alignment
Materials: Aluminum, Steel, Delrin
Features: Modular, Reusable, High Accuracy

Custom Non-Standard Parts

Complex, one-off, or low-volume custom parts for unique engineering challenges across industries.

Design-to-Manufacture Support
Materials: Any machinable metal or plastic
Processes: 3–5 Axis CNC, EDM

Frequently Asked Questions

What materials can you machine?

We work with stainless steel, alloy steel, aluminum, copper, brass, bronze, PEEK, nylon, Delrin, PTFE, and other engineering plastics and metals.

What is your typical lead time?

Prototypes: 3–7 days. Mass production: 10–20 days depending on complexity and volume.

Do you offer surface treatments?

Yes, we provide anodizing, black oxide, powder coating, high polishing, plating, and other surface finishes.

Can you handle complex or non-standard parts?

Absolutely. We specialize in complex geometries, tight tolerances, and custom non-standard components.

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Precision CNC Machining for Automation & Auto Parts