What Is Secondary Processing in Die Casting? A Guide to Post-Casting Operations

Die casting produces near-net shape parts, but most components still need secondary processes to meet functional or cosmetic requirements. These post-casting operations are critical to achieving the final product specifications.

Understanding them helps engineers plan better—and buyers forecast costs more accurately.

🧰 Common Secondary Operations:

1. CNC Machining

   For critical surfaces, tapped holes, or high-precision features. Ensures tolerances down to ±0.015mm.

2. Deburring / Flash Removal

   Manual or mechanical trimming of excess material along parting lines, ejector pin marks, or overflow tabs.

3. Shot Blasting or Tumbling

   Smooths surface, removes oxide layer, and improves paint or ED coating adhesion.

4. Tapping & Thread Insertion

   Internal threads are often added via tapping or helicoil insertion after casting.

5. Surface Finishing

   ED coating, powder coating, anodizing, or wet paint depending on part function and environment.

6. Leak or Pressure Testing

   For die-cast enclosures, fluid-carrying components, or assemblies requiring sealing performance.

7. Sub-Assembly

   Some parts require post-casting hardware like studs, rivets, or component assembly before shipment.

At LVIO Precision, we manage these processes either in-house or through qualified vendors, depending on project scope. Our production team works to ensure the post-casting plan matches your downstream requirements—so your parts arrive truly “ready to use.”