Gravity Casting Post‑Processing & CNC Machining

What is Post-Gravity-Casting Machining?

Post-gravity-casting machining refers to precision CNC processing of gravity-cast parts to achieve final dimensional accuracy, improve surface quality, and create functional features such as threaded holes, precision slots, and mounting surfaces. Gravity casting produces dense, low-porosity castings with good mechanical properties; CNC machining then ensures tight tolerances, smooth critical surfaces, and assembly-ready geometry. This integrated approach is widely used in automotive, aerospace, hydraulics, and high-performance industrial components.

Our Capabilities in Machining Gravity‑Cast Components

We specialize in machining gravity‑cast aluminum, zinc, and copper alloys. Our equipment includes multi‑axis CNC centers and rigid fixturing systems designed to handle medium‑ to large‑sized castings with stability and precision, ensuring consistent quality from prototype to production volumes.

From Sand Casting to Finished Part

Submit your casting design or sample for a comprehensive manufacturability review. We provide DFM feedback to optimize both the casting and machining stages for performance, cost, and lead time.

Common Gravity‑Cast Materials We Machine

▪ Aluminum Gravity Castings: A356, A357, ZL101, ZL104, etc.

▪ Zinc Gravity Castings.

▪ Copper‑Based Gravity Castings: Bronze, Brass

We can source cast blanks or machine your supplied castings.

Finishing & Treatment Options

▪ Shot Blasting / Sand Blasting

▪ Polishing & Brushing

▪ Anodizing (for Aluminum)

▪ Plating (Nickel, Chrome, Zinc)

▪ Painting & Powder Coating

▪ Sealing / Impregnation (if required)

CNC Machining Service

At Xinchenda Metal, we use advanced equipment to offer you a variety of CNC machining services including CNC Machining,CNC Milling,CNC Turning,5-Axis CNC Machining Service,Swiss-type CNC Machining Services,Surface Finishing,Parts Assembly Service and much more. Using our imported 3, 4 and 5-axis CNC machining centers, our skilled machinists can make turned and milled parts using a wide range of plastic and metal materials.

From Concept to Production

We support your project from initial design to final part delivery. Upload your drawings to start a free project review and receive expert DFM feedback.

Available Materials

▪ Metals: Steel, aluminum, stainless steel, brass, copper, and more

▪ Plastics: Acrylic, PC, PEEK, PEI, Nylon, PP, PVC, and other engineering grades
Contact us for full material specifications

Advantages of CNC Machining

▪ High accuracy and repeatability

▪ Low tooling investment

▪ Broad material compatibility

▪ Efficient material removal

▪ Cost-effective for prototypes to mid-volume runs

▪ Fast turnaround and scalable production

Surface Finishing Options

We provide a range of finishes to meet aesthetic and functional requirements, including anodizing, painting, bead blasting, polishing, pad printing, and custom color matching.