Custom Die Casting Services — Aluminum & Zinc

Sendot Technology provides custom die casting of aluminum, zinc, and magnesium parts — high-pressure die casting (HPDC) for strong, thin-walled, net-shape metal components at production volumes, plus machining and finishing under one roof, shipped worldwide.

Key takeaways

Die casting forces molten metal under high pressure into a reusable steel mold (die) to make accurate, net-shape metal parts at scale.
Two processes: cold-chamber (aluminum, magnesium) and hot-chamber (zinc) die casting.
Common alloys: aluminum (ADC12, A380), zinc (Zamak 3/5), magnesium.
Best for high volumes of thin-walled, complex metal parts; tooling is the main upfront cost.
Upload your CAD for a free DFM review and quote.

What is die casting?

Die casting injects molten metal under high pressure into a hardened steel mold called a die. The metal solidifies quickly into a precise, repeatable net-shape part with good surface finish and thin walls, then the die opens and ejects it. Because the steel die is reusable for hundreds of thousands of shots, die casting delivers a very low cost per part at high volume. Learn the fundamentals in our die casting guide and high-pressure die casting overview.

Die casting processes

Cold-Chamber Die Casting

For high-melting-point metals like aluminum and magnesium. Molten metal is ladled into the chamber each cycle.

Hot-Chamber Die Casting

For low-melting-point metals like zinc. Faster cycle times for high-volume small parts.

Die casting alloys

Alloy	Strengths	Typical uses
Aluminum (ADC12, A380)	Light, strong, corrosion-resistant, good thermal	Housings, brackets, automotive, electronics
Zinc (Zamak 3/5)	Fine detail, thin walls, long die life, platable	Connectors, locks, hardware, decorative parts
Magnesium	Lightest structural metal, high strength-to-weight	Lightweight housings, handheld devices

Choosing between the two most common alloys? Read Aluminum vs Zinc Die Casting. We also CNC machine aluminum for low volumes where casting tooling is not justified.

Applications

Automotive — housings, brackets, structural and powertrain components
Electronics & telecom — heat sinks, enclosures, connectors, shielding
Industrial & consumer — pump bodies, valve parts, hardware, fittings

See part examples in die casting parts and the trade-offs in advantages and disadvantages of die casting.

Why choose Sendot for die casting

Sendot by the numbers

20+ years in custom manufacturing (founded 2003, Guangzhou, China)
Aluminum, zinc, and magnesium die casting with in-house tooling
Post-machining (CNC), finishing (powder coat, anodize, plating) and assembly under one roof
Full inspection (CMM) and English-speaking engineering support
For low volumes, pair with rapid tooling or CNC machining

Frequently asked questions

What metals can be die cast?

The most common are aluminum (ADC12, A380), zinc (Zamak 3 and 5), and magnesium. Aluminum and magnesium use cold-chamber machines; zinc uses hot-chamber machines.

What is the difference between aluminum and zinc die casting?

Aluminum is lighter and stronger for structural parts; zinc casts finer detail and thinner walls, plates beautifully, and gives longer die life. See our aluminum vs zinc die casting guide.

Is die casting cost-effective for low volumes?

No. Die casting needs a steel die, so it suits higher volumes where the tooling cost is spread across many parts. For prototypes or low volumes, CNC machining or rapid tooling is usually cheaper.

Can die cast parts be machined and finished?

Yes. We CNC machine critical features after casting and apply finishes such as powder coating, anodizing, plating, and painting — all in house.

Get a die casting quote

Upload your CAD for a free DFM review and a quote on aluminum, zinc, or magnesium die casting — with machining, finishing, and global shipping.

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