Custom Die Casting Services
Custom die casting for aluminum, zinc, and magnesium alloy parts, with tooling, casting, CNC machining, and finishing support from prototype validation to production.
- Factory-Direct Pricing
- Free DFM & Tooling Review
- Prototype to Production
Quality Certifications
ISO 9001:2015 | IATF 16949:2016
STP | STEP | SLDPRT | IPT | PRT | SAT
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Die Casting Manufacturer with Advanced Production Facilities
ZH Precision is a China-based die casting manufacturer serving OEM customers in Europe, North America, and other global markets. Our in-house die casting facility is equipped with 88T to 3000T cold-chamber and hot-chamber machines, supporting aluminum, zinc, and magnesium alloy parts across a wide range of sizes and production volumes.
From small housings and structural components to larger automotive and industrial parts, we support tooling, CNC prototyping services, die casting, secondary CNC machining, inspection, and production delivery within one manufacturing system.
Types of Die Casting Processes at ZH Precision
We use hot-chamber and cold-chamber die casting to match different alloy systems, part sizes, and production requirements. The process is selected based on material, geometry, wall thickness, tooling requirements, and expected production volume.
Hot-chamber die casting
Hot-chamber die casting is commonly used for zinc and selected magnesium alloys. The injection system is immersed in the molten metal, allowing fast shot cycles and efficient high-volume production.
It is well suited for small to medium-sized parts with detailed features, thin walls, and good surface requirements, such as connectors, brackets, housings, and other precision die cast components.
Cold-chamber die casting
Cold-chamber die casting is commonly used for aluminum and selected magnesium alloys. Molten metal is ladled into the shot chamber for each cycle before being injected into the die under high pressure.
The process is suitable for a wide range of part sizes, including housings, structural components, automotive parts, and other components that require strength, dimensional consistency, and repeatable production.
Comprehensive Secondary & Assembly Services
We deliver fully integrated in-house secondary processing and turnkey assembly solutions. Standardized process workflows, unified quality oversight and centralized project management streamline your procurement chain, lower cross-supplier risks, and sustain stable, predictable lead times for all cast components.
Secondary Processing
Professional gate cutting, flash trimming and deburring clean raw cast surfaces for subsequent operations.
CNC Precision Machining
Milling, turning, drilling, tapping and grinding achieve precise dimensions and complex structural features.
Surface Treatment
Polishing, electroplating, coating and passivation enhance wear resistance, corrosion protection and appearance.
100% Full Inspection
Every part undergoes 100% inspection to verify all A, B, and C surfaces meet quality standards.
Die Casting Parts We Manufacture
We manufacture custom aluminum die cast housings, heat sinks, and structural components for communication and industrial applications. Typical parts include RRU enclosures, 5G small-cell housings, micro and macro base-station enclosures, and other heat-dissipation components produced to customer drawings and specifications.
Die Casting Capabilities
Our die casting capabilities support aluminum, zinc, and magnesium parts across different sizes and wall thicknesses. Casting tolerances can follow ISO 8062-3:2023, while secondary machined dimensions can follow ISO 2768-1 or customer-specified drawing tolerances.
| Title | Description |
|---|---|
| Minimum Part Weight | 0.005 kg |
| Maximum Part Weight | 50 kg |
| Minimum Part Size | Ø17 mm × 4 mm |
| Maximum Part Size | 300 mm × 650 mm |
| Minimum Wall Thickness | 0.8 mm (material dependent) |
| Maximum Wall Thickness | 12.7 mm (DFM review required) |
| Typical Die Life | Al/Mg: ~100,000 shots; Zinc: ~1,000,000 shots |
| Minimum Order Quantity | Prototype and production quantities supported |
| Standard Lead Time | 20–25 days, subject to part complexity |
Ready to develop your custom die casting parts?
Share your drawings, target specifications and order volume. Our engineering team will review your project and provide tailored solutions promptly.
Die Casting Material Options
Our available die casting materials cover aluminum, zinc and magnesium alloys. All alloy raw materials comply with international specifications and are supported by full traceable material test certificates.
Aluminum Die Casting
Aluminum alloys provide a balanced combination of strength, low density, and thermal stability. They offer good corrosion resistance, stiffness, and dimensional consistency, making them suitable for components requiring structural reliability and heat dissipation performance.
Available Grades: ADC06, ADC12, A360, A380, A383, LM06, HH334R
Zinc Die Casting
Zinc alloys feature outstanding fluidity and dimensional stability, capable of forming intricate thin-wall geometries. They deliver excellent surface finish and support various plating, polishing and coating treatments for precision and aesthetic components.
Available Grades: Zamak 3, Zamak 5, Zamak 7, ZA-8
Magnesium Die Casting
Magnesium alloys have the lowest density among commercial die casting materials, enabling significant weight reduction. They maintain decent rigidity and shock resistance, widely used for lightweight structural assemblies.
Available Grades: AZ91D, AM60B, AM50A
DFM Guidelines for Die Casting Parts
Good die casting design helps improve metal flow, reduce porosity and distortion, simplify tooling, and control secondary machining costs. Key factors include wall thickness, draft, ribs, radii, bosses, and machining requirements.
| Design Item | Engineering Recommendation |
|---|---|
| Uniform Wall Thickness | Keep wall thickness as uniform as possible and avoid abrupt section changes that can cause uneven cooling and shrinkage. |
| Draft Angle Design | Add sufficient draft on surfaces parallel to the die opening direction to improve part release and reduce die wear. |
| Rib Design | Use ribs to increase stiffness without creating unnecessarily thick sections or excessive material buildup. |
| Fillet and Corner Radius | Avoid sharp internal corners and use suitable radii to improve metal flow and reduce local stress concentration. |
| Boss and Hole Design | Support bosses properly and avoid excessive material around holes to reduce shrinkage and porosity risks. |
| Machining Allowance | Add machining stock only where critical dimensions, sealing surfaces, threads, or precision fits require secondary machining. |
Surface Finishes for Die Casting Parts
Die cast parts can be finished with anodizing, polishing, sand blasting, tumbling, electropolishing, Alodine, and electroplating based on alloy type and application needs. These finishes improve appearance, corrosion resistance, and surface performance.
As Cast
The natural surface finish after die casting, suitable for parts where machining or additional finishing is not required.
Anodizing
Provides enhanced corrosion resistance and a durable surface layer, commonly used for aluminum die cast parts requiring improved appearance and protection.
Polishing
Creates a smooth, reflective surface finish for components requiring improved appearance and a refined surface texture.
Sand Blasting
Produces a uniform matte texture while removing surface imperfections and improving the appearance of die cast parts.
Tumbling
Improves surface consistency by removing sharp edges, burrs, and minor imperfections through mechanical finishing.
Electropolishing
Enhances surface smoothness and cleanliness while improving corrosion resistance for applications with strict surface requirements.
Alodine
Provides corrosion protection and improves paint adhesion while maintaining the original dimensions of aluminum castings.
Electroplating
Applies a metal coating to improve corrosion resistance, wear performance, or decorative appearance.
Die Casting Parts Quality Control
Our die casting quality system follows ISO 9001:2015 and IATF 16949:2016, with incoming material inspection, first article inspection, in-process checks, and final inspection applied throughout production.
Casting quality is checked for common defects such as porosity, shrinkage, cold shuts, and flash, while critical dimensions and machined features are verified according to customer drawings. Material verification and process parameter control help maintain consistent quality across repeat production.
Why OEM Customers Choose ZH Precision
We support OEM die casting projects from tooling and sampling through production, secondary CNC machining, inspection, and delivery. Our focus is on controlling manufacturing cost, maintaining stable production schedules, and meeting drawing and quality requirements across repeat orders.
Cost Control
DFM and tooling review help identify unnecessary material, difficult features, and secondary machining requirements before mold production. This helps control tooling investment and unit cost as production volumes increase.
Production & Lead Time
In-house die casting and secondary CNC machining reduce handoffs between suppliers and simplify production scheduling. Prototype validation and production orders can be managed within the same manufacturing workflow.
Quality Control
Production follows ISO 9001:2015 and IATF 16949:2016 quality systems, with incoming material inspection, in-process checks, first article inspection, and final verification based on customer drawing requirements.
What is Die Casting?
Die casting is a metal casting process in which molten metal is injected into a hardened steel die under high pressure. It is commonly used for medium- to high-volume production of parts with complex shapes, thin walls, consistent dimensions, and good as-cast surface quality.
The die may contain one or multiple cavities depending on part design and production volume. Hot-chamber or cold-chamber machines are selected according to the alloy and casting requirements. After the metal fills the cavity and solidifies, the part is ejected, trimmed, and can be further processed with CNC machining, surface finishing, or assembly when required.
Advantages of Die Casting
Complex Geometries： Produces thin walls, ribs, bosses, and integrated features that reduce part count and secondary assembly.
High Production Efficiency： Supports fast cycle times and consistent production output for medium- to high-volume manufacturing.
Dimensional Repeatability： Maintains consistent dimensions across repeat production through stable tooling and controlled casting parameters.
Good Surface Quality： Produces relatively smooth as-cast surfaces that can reduce secondary finishing requirements.
Efficient Material Use： Creates near-net-shape parts with less machining stock and material waste.
Lower Unit Cost at Volume： Reduces per-part cost as production quantities increase and tooling investment is spread across more parts.
Die Casting Applications
Automotive Components： Produces housings, brackets, structural parts, transmission components, and other lightweight metal components for automotive applications.
Electronics & Electrical Parts： Manufactures enclosures, connectors, heat sinks, and protective housings for electronic and electrical equipment.
Industrial Equipment： Supports machine housings, covers, brackets, frames, and functional components requiring strength and dimensional consistency.
Telecommunications Equipment： Produces RRU housings, base-station enclosures, heat sinks, and other thermal management components for communication equipment.
Consumer Products： Manufactures durable metal housings, structural parts, and functional components for appliances, tools, and electronic products.
Medical Equipment： Supports precision housings, brackets, equipment components, and other metal parts manufactured to specified dimensional and quality requirements.
Frequently Asked Questions
Die casting project costs are mainly determined by mold complexity, part size, alloy material, wall thickness, production volume, and required post-processing. Higher precision requirements, intricate geometries, and additional surface finishes will also affect the final quotation.
Typical die casting defects include porosity, shrinkage, flash, cold shuts, and surface oxidation. These issues are mainly caused by unstable injection speed, improper mold temperature, and poor venting, which can be effectively controlled via optimized DFM and precise process parameters.
We provide a full range of surface treatments for die cast parts, including polishing, sandblasting, anodizing, powder coating, plating, and passivation. Different finishes improve corrosion resistance, wear resistance, and aesthetic appearance for diverse application scenarios.
Standard die casting lead time depends on mold development and production quantity. New mold fabrication usually takes 2–4 weeks, and mass production can be completed within 1–2 weeks according to order volume. Rush orders are available upon request.
Our die casting process maintains stable industrial-grade tolerances. General dimensional tolerance ranges from ±0.1mm to ±0.3mm, and tighter precision can be achieved with secondary CNC machining to meet strict assembly and industrial standards.