3D printing technology has revolutionized manufacturing, offering precision and efficiency in producing complex metal components. However, achieving the desired surface finish often requires post-processing. In this video short, we showcase how Bel Air Finishing refines a 17-4 stainless steel part printed with Markforged technology, demonstrating our expertise in surface enhancement.
The customer’s challenge? The printed part appears darker than desired. Our solution involves a two-step finishing process utilizing slurry blasting and magnetic pin finishing, two advanced techniques that modify the surface to achieve both brightened and polished results.
Step 1: Surface Refinement with the Industrial 3D Print Smoother
The first step in the process involves slurry blasting in the Industrial 3D Print Smoother, an advanced finishing system that uses a pressurized mix of water and fine abrasive media to gently remove a thin surface layer. This process brightens the part by revealing the underlying material without affecting critical tolerances. Unlike traditional methods that rely on harsh chemicals, slurry blasting provides a chemical-free, dust-free solution, ensuring a safe and efficient process for industries requiring precision surface preparation.
Step 2: Precision Polishing with Magnetic Pin Finishing
After slurry blasting, the part is placed in the Magnetic Pin Finisher, where small stainless steel pins, activated by a rotating magnetic field, gently polish the surface. This process smooths internal features, cross-holes, and sharp angles, achieving a uniform finish with minimal manual effort. The result is a refined, polished part with enhanced aesthetics and functionality.
Achieving Tailored Surface Finishes
To further demonstrate the available finishes, Bel Air provided the customer with a comparative keychain showcasing five different surface treatments. This hands-on sample made it easy to see and feel the variations between finishes. Along with it, we included a micrograph report that offered a closer look at the surface details. These resources gave the customer a clear way to evaluate their options and determine the best finish for their needs.
See Us at RAPID 2025
Want to explore cutting-edge 3D post-processing techniques? See us at RAPID 2025 to learn more about our expertise in 3D post-processing and surface finishing. Learn how Bel Air Finishing can refine your additive manufacturing process with precision-driven finishing solutions.
Contact us to discuss your 3D post-processing needs and find the right finishing solution for your application!