Custom Machined Castings Service & Factories

High-Precision CNC Post-Machining & Advanced Investment Casting Solutions for Global Critical Industrial Infrastructure

2014
Established Year
< 0.005mm
CNC Tolerance
98.7%
First Pass Yield
20+
Global Markets

The Global Industrial Landscape of Machined Castings

In the modern manufacturing chain, the division between basic casting and precision machining has converged. Global industries no longer seek raw castings; they demand near-net-shape machined castings that combine the geometric versatility of sand or investment casting with the micro-precision tolerances of multi-axis CNC subtractive machining.

From heavy infrastructure components to complex interior parts for zero-emission buses, the need for components to perform reliably under extreme thermal, kinetic, and environmental stress is paramount. Developing these parts requires advanced metallurgical controls and tight CNC machining synchronization. This helps prevent internal porosity defects and structural cracking during production.

Dongguan SX Technology Manufacturing facility

Expertise, Capability & Advanced Metallurgy

Dongguan SX Technology Co., Ltd. delivers high-precision components by combining advanced investment casting with state-of-the-art CNC machining.

Unmatched Material Versatility

Since 2014, Dongguan SX Technology Co., Ltd. has specialized in precision casting, CNC machining, and complex assembly processes. Our engineering teams work with a wide range of materials to meet demanding specifications:

  • Investment Casting Materials: Primarily high-grade Stainless Steel (304, 316, 17-4 PH) for corrosion resistance, and structural Carbon Steel (WCB, LCC) for high-strength applications.
  • CNC Machining Specialties: Medical-grade Titanium Alloys (Ti-6Al-4V), structural Aluminum Alloys (6061-T6, 7075-T6), high-conductivity Copper Alloys, and wear-resistant Cemented Carbides.

By managing the entire production flow under one roof—from tool design and wax injection to CNC finish milling—we minimize thermal deformation risks and deliver components ready for final assembly.

High Precision CNC Mill Processing Castings

Advanced Production & Machining Facility

Our workshop houses high-precision equipment to process castings through multi-axis CNC milling, turning, and EDM.

High-Tolerance Integration Capability

Unlike traditional casting foundries that rely on third-party machine shops, our in-house engineering team bridges the gap. We design casting molds with optimal machining allowances (typically 1.5mm to 3.0mm) to minimize tool wear and cycle times. This design integration reduces tooling costs and speeds up delivery times for our customers.

Macro-Industry Solutions & Local Applications

Delivering engineering solutions engineered for specific operating conditions across global industrial sectors.

Automotive & Public Transit

Whether manufacturing high-strength mechanical gears or bus components, our casting and CNC processes provide the wear resistance needed for high-mileage commercial operations.

Flow Control & Fluid Dynamics

We manufacture stainless steel valve bodies and pressure-rated pump housings. Our CNC post-machining ensures precise O-ring seating surfaces to prevent leaks under high pressures.

Medical & Mobility Solutions

From wheelchair components to orthotic parts, we turn and mill biocompatible titanium and high-strength aluminum to strict dimensional specifications.

Technology & Process Roadmap

Our systematic workflow integrates quality checks at every stage, from raw design to finished component delivery.

Phase 1
DFM & Simulation Analysis

We perform solidification modeling to identify potential shrinkage or porosity issues before cutting mold steel, ensuring robust casting geometry.

Phase 2
Precision Investment Casting

Wax patterns are coated in high-durability ceramic slurries. Decarburization and precise alloy pouring take place in a temperature-controlled foundry.

Phase 3
Thermal Heat Treatment

Castings undergo normalizing, annealing, or tempering to relieve internal stresses and stabilize the material's grain structure for subsequent machining.

Phase 4
CNC Machining & Quality Inspection

Precision turning, milling, and thread cutting are completed on high-precision CNC centers, followed by CMM inspection to verify tight tolerances.

Quality Inspection Control Center

Our Quality Standards

Quality is the foundation of reliable manufacturing. At Dongguan SX Technology Co., Ltd., we utilize dedicated testing equipment and experienced QC inspectors to enforce strict dimensional tolerances and material standards.

Through continuous investments in our production facilities and staff training since 2014, we deliver parts that meet or exceed customer specifications. Our inspections cover chemical composition verification, hardness testing, non-destructive testing (NDT), and 3D coordinate metrology.

Frequently Asked Questions

Technical insights into our custom casting processes, machining capabilities, and quality controls.

What dimensional tolerances can you achieve on machined castings?
For investment castings, our standard linear tolerances follow VDG P690 class D1 or D2 guidelines. After post-casting CNC machining, we can achieve critical tolerances down to ±0.005 mm on bore diameters, bearing pockets, and mating surfaces.
How do you verify material grades and casting integrity?
We perform spectrometer testing to verify the chemical composition of each melt. Casting integrity is monitored through non-destructive testing (NDT), hydrostatic pressure tests for valve bodies, and Coordinate Measuring Machine (CMM) inspections for dimensional verification.
Which materials does SX Technology machine most frequently?
For investment casting, we work primarily with stainless steel and carbon steel. Our CNC machining operations handle titanium alloys, stainless steel, carbon steel, aluminum alloys, copper alloys, and cemented carbides.
How do you minimize internal porosity in investment castings?
We use computer-aided thermal solidification simulation to design gating systems and risers. This optimization, combined with controlled pouring temperatures, ensures directional solidification and minimizes internal gas and shrinkage porosity.