Industrial Grade Excellence

OEM Metal Castings Manufacturers & Supplier

High-Precision Custom Investment Casting, CNC Machining Services, and Turnkey Subtractive Engineering Solutions Designed for Mission-Critical Global Applications.

Product Portfolio

Precision Engineered Parts Showcase

Browse our high-performance casting and machining catalog. Click below to inspect standard drawings, configurations, and request engineering assessments.

Custom CNC Turning and Milling Services

Custom CNC Turning and CNC Milling Services for Various Metal Materials

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OEM Customized CNC milling of aluminum alloy parts

OEM Customized CNC milling of aluminum alloy parts Manufacturers, Products

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High precision non-standard OEM stainless steel investment casting parts

China High precision non-standard OEM stainless steel investment casting parts Manufacturers, Products

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Non-standard CNC Machining Services for Outdoor Product Parts

China Non-standard CNC Machining Services for Outdoor Product Parts Supplier, Factories

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OEM Steel Precision Casting Gear Parts

OEM Steel Precision Casting Gear Parts Service, Factory

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Stainless steel precision casting parts for marine projects

Custom Stainless steel precision casting parts for marine projects Product, Factories

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OEM Investment Casting Stainless Steel Parts

OEM Investment Casting Stainless Steel Parts for Machinery Service, Factory

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Custom Stainless Steel CNC turning Parts

Custom Stainless Steel CNC turning Parts

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Enterprise Background

The Technical Vanguard of Custom Casting & CNC Machining

Operating from the global manufacturing core of southern China, Dongguan SX Technology Co.,Ltd represents a legacy of engineering precision, offering high-fidelity precision casting, subtractive CNC machining, and sub-assembly solutions. Established in 2014, our operations have evolved in tandem with advancements in metallurgical science and automated milling systems. Today, we stand as a key OEM manufacturer, providing components that survive the harshest environments.

Whether your project requires raw investment casted shapes or complex 5-axis dimensional profiles, our production facilities process a diverse range of materials—including titanium alloys, stainless steel, carbon steel, aluminum, copper alloys, and cemented carbides. Through integration of CAD/CAM modeling, predictive casting analysis, and multi-disciplinary metallurgical controls, we serve industries such as offshore marine platforms, automotive drivetrains, medical instrumentation, pressure valves, and custom aerospace systems.

Dongguan SX Technology Facilities
2014
Established Year
±0.005mm
Machining Tolerance
50+
Global Industries Served
99.8%
QC Compliance Rate
Material Science

Comprehensive Metallurgy Matrix & Structural Properties

Understanding material behavior under thermal, mechanical, and chemical stress is crucial to avoiding down-time. Our engineers manufacture with the following materials:

Material Family Primary Alloys Handled Casting Compatibility Machining Complexity Target Industrial Fields
Stainless Steel SUS304, SUS316L, 17-4 PH, Duplex 2205 Excellent (Silica Sol Process) Medium to High Marine fittings, offshore structures, valves, pumps, food processing equipment.
Carbon Steel WCB, LCC, AISI 1020, AISI 1045 Excellent (Investment Casting) Low to Medium Heavy industrial machinery, structural supports, automotive suspension, gears.
Titanium Alloy Grade 2, Grade 5 (Ti-6Al-4V) Specialist Vacuum Casting Very High (Cryogenic/Advanced) Aerospace fasteners, medical implants, high-performance cycling components.
Aluminum Alloy AL6061, AL7075-T6, A356, A380 Die Casting & Gravity Casting Low (Fast Cycle Speed) Automotive engine housings, electronics enclosures, outdoor tool frames.
Copper & Bronzes C3600 Brass, Phosphor Bronze, Al-Bronze High (Investment/Centrifugal) Low to Medium Marine propellers, electrical contact terminals, anti-friction bushings.
Cemented Carbide Cobalt-bound Tungsten Carbide (WC-Co) Powder Sintering Preforms Extremely High (Grinding/EDM) High-wear nozzles, tooling inserts, drilling heads, mining machinery.
Operational Excellence

Advanced Production Workshop & Metrology Facilities

Equipped with automated manufacturing lines, high-speed multi-axis CNC machines, and strict quality control verification instruments.

Automated Investment Casting Setup

1. Investment Pattern Line

Utilizing high-stability industrial waxes to inject precise patterns, ensuring repeatability for intricate features.

CNC Precision Machining Center

2. Multi-Axis Milling Centers

Equipped with high-performance CNC machining equipment to achieve dimensional tolerances down to ±0.005mm.

Post-Processing & Finishes

3. Surface Engineering

Shot blasting, electro-polishing, passivating, and anodizing lines to maximize wear and oxidation resistance.

Heat Treatment Facilities

4. Metallurgical Stabilization

Controlled thermal processing, annealing, stress relieving, and tempering to stabilize grain structures.

Quality Inspection Workspaces

5. Metrology Laboratory

Housing CMM machines, optical comparators, spectrographs, and hydraulic tensile stress testers.

Assembly & Packing

6. Final Sub-Assembly & Pack

Dust-free packaging, anti-corrosion oil application, and custom crating to prevent transport degradation.

Quality Control Inspection Processes
Zero-Defect Quality Assurance

Strict Quality Assurance Methodology

At Dongguan SX Technology Co.,Ltd, quality is not a retrofitted metric; it is the core foundation of our production lifecycle. We maintain compliance protocols that govern each phase of production. Our metallurgical testing verifies that all alloys correspond to ASTM, DIN, JIS, and GB standards.

Our dimensional inspection incorporates Coordinate Measuring Machines (CMM), 2D projectors, digital micro-calipers, and thread gauges. In addition to physical measurements, we perform Non-Destructive Testing (NDT), including ultrasonic thickness detection, liquid dye penetrant testing, and industrial X-ray analysis to check for gas porosity, micro-cracks, or solidification shrinkage cavities.

  • Spectrochemical verification of incoming steel heat chemistry.
  • In-process micro-hardness check (Vickers / Rockwell scales).
  • Hydrostatic testing for pump housing and valve cast parts.
  • Full traceability records linked directly to alloy batches and dimensional reports.
Macro Industry Solutions

Overcoming Challenges in Global Metal Procurement

International buyers encounter multi-faceted supply chain obstacles, from dimensional variance to logistics delays. Here is how our OEM solutions address these pain points:

1. Material Authenticity & Quality Consistency

The Problem: Sourcing parts that look correct but fail under stress due to incorrect material compositions.

The Solution: Every casting batch runs through optical emission spectrometers (OES). We provide full EN 10204 3.1 Material Certificates and raw chemistry analysis.

2. Prototypes Transitioning to High Volume

The Problem: Prototype development processes that do not translate to production runs, causing design drift.

The Solution: Our engineering team conducts Design-for-Manufacturability (DFM) reviews to ensure casting pathways and machining jigs are optimized for mass production.

3. Consolidation of Casting & CNC Machining

The Problem: Splitting orders between a casting house and a machining shop, resulting in dimensional finger-pointing when tolerance issues arise.

The Solution: Dongguan SX Technology manages both phases. We are fully accountable for the final dimensional output.

Future Outlook

Technological Roadmap & Sustainable Casting Trends

We track the transition of industrial metal processing toward digitalization, hybrid production methods, and lower environmental footprints.

3D Printed Sand and Wax Patterns

Integrating industrial polymer and wax 3D printers directly into our casting sequence. This tool-less casting methodology reduces tooling times for complex pre-production samples from weeks to days, allowing rapid iteration of marine propellers and specialized valve designs.

AI-assisted Solidification Simulation

Utilizing finite element analysis (FEA) software to simulate flow vectors and thermal dissipation during liquid metal pouring. By mapping heat distribution digitally, we design runner configurations that prevent porosity, hot tears, and volumetric contraction defects.

Green Casting & Clean Energy Integration

Complying with carbon reduction mandates, our production facilities incorporate high-frequency induction furnaces that minimize electrical waste. Scrap metals are sorted and re-melted in structured ratios, reducing raw energy requirements while maintaining pure alloy chemistry.

Compliance & Support

Global Compliance, Logistics & Localized Engineering

Understanding the complexities of international trade is critical for supply chain integration. We verify that all components comply with international specifications including RoHS, REACH, and custom customs rules.

Our dedicated team coordinates with global logistics channels to handle FOB, CIF, DDP, and DAP shipments. For engineering changes, we provide design support using CAD systems (SolidWorks, AutoCAD, UG NX) to ingest step, igs, and dwg files directly. Our engineers offer prompt response times, helping to resolve design issues before manufacturing begins.

Quality Certifications

  • Production Part Approval Process (PPAP Level 3)
  • ISO 9001:2015 Compliant Quality Controls
  • CMM & Spectrograph Dimensional Validation
  • RoHS Directive Compliance Certifications
Industrial Q&A

OEM Metal Casting & CNC Machining FAQs

Find answers to technical and procedural questions regarding custom metal fabrication.

What is the standard lead time for prototype tooling vs. production casting?
For precision investment casting, mold design and wax injection tooling typically take 15 to 25 days, depending on geometry complexity. Once tooling is validated, pilot sample runs require 7 to 10 days. Mass production cycles range between 30 and 45 days, depending on batch volumes and post-casting CNC machining requirements.
What dimensional tolerances can be achieved through investment casting alone?
Our standard silica sol investment casting process achieves tolerances within ISO 8062-3 Grade CT4 to CT6. For features demanding tighter fits, such as bearing journals and sealing threads, we execute secondary CNC milling, turning, or grinding operations to hold tolerances down to ±0.005mm.
How does Dongguan SX Technology verify that castings do not contain internal defects?
We use Non-Destructive Testing (NDT) methodologies. For surface integrity, we perform dye penetrant inspection (DPI) and magnetic particle testing (MPT). For internal porosity and volumetric integrity, we employ industrial X-ray radiography and ultrasonic testing (UT).
Can you machine hard materials like titanium alloys and cemented carbides?
Yes. We machine difficult alloys, including Grade 5 Titanium (Ti-6Al-4V) and Cobalt-bound Tungsten Carbide. Our CNC machines are equipped with rigid spindles, high-pressure coolant systems, and wear-resistant carbide or diamond-coated tooling to handle these materials.
What is your Minimum Order Quantity (MOQ)?
Our setup is optimized to scale from low-volume prototypes (10 to 50 pieces) to high-volume production runs (10,000+ pieces). The specific MOQ is determined by the size, complexity, tooling requirements, and raw material of the part.
Additional Catalog

Precision Subtractive & Custom Components

Explore additional machined and cast configurations designed for heavy machinery, marine engineering, and automotive systems.

High-Quality Stainless steel precision CNC machining parts

High-Quality Stainless steel precision CNC machining parts Manufacturers, Service

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Custom High precision machining for stainless steel components

Custom High precision machining for stainless steel components Manufacturer, Supplier

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Custom Precision Machined Components

Custom Precision Machined Components - Non-Standard Specifications

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Custom Non-Standard Metal Precision Casting Components

Custom Non-Standard Metal Precision Casting Components

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OEM Investment casting parts used in buses

OEM Investment casting parts used in buses Manufacturer, Products

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High-Quality CNC milling services for non-standard aluminum components

High-Quality Providing CNC milling services for non-standard aluminum components Manufacturers, Product

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Custom Precision Casting Service for Marine and Offshore Engineering

Custom Precision Casting Service for Marine and Offshore Engineering

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High-Quality CNC Turning Titanium Alloy Screws

High-Quality CNC Turning Titanium Alloy Screws for Mountain Bike Modification Product, Factory

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