Precision 6061 Aluminum Milled Star-Shaped Adapter Flange with Electroless Nickel Plating

We successfully manufactured a precision 6061 aluminum star-shaped adapter flange featuring a complex multi-lobe star geometry precision CNC milled from solid 6061-T6 billet, finished with a uniform electroless nickel plating for enhanced surface hardness, superior corrosion resistance, and consistent functional appearance. This custom adapter flange serves as a precision interface component for specialized equipment assembly, requiring tight dimensional control across the star-shaped profile and reliable plated surface performance.

Project Overview

Key Technical Highlights

• Complex Star Geometry Machining: Successfully machined a multi-lobe star-shaped profile from solid 6061-T6 billet with ±0.015mm lobe positional accuracy across the entire array — achieved through multi-axis CNC milling with optimized toolpath strategies ensuring consistent geometry across all star lobes.
• Process Innovation:
  • Single-Setup Multi-Axis Milling: Complete star-shaped flange geometry — including multi-lobe contour, center bore, and mounting hole patterns — machined in a single fixturing setup, ensuring perfect geometric alignment between all features with no re-fixturing errors.
  • Star Lobe Contouring Strategy: Optimized roughing and finishing toolpaths with continuous engagement control achieve smooth star-shaped contours without step marks or tool deflection, maintaining ±0.02mm overall dimensional tolerance.
  • Surface Preparation: Precision finishing passes achieve Ra≤1.6μm surface finish on critical sealing and interfacial surfaces prior to plating, ensuring optimal plating adhesion and consistent coating quality.
• Electroless Nickel Plating:
  • Uniform Coating Coverage: Electroless nickel plating provides consistent 15-25μm coating thickness across all complex star-shaped surfaces — including internal corners, edges, and blind features — without the thickness variations typical of electrolytic processes.
  • Enhanced Surface Performance: Plated surface achieves HRC 48-52 surface hardness with excellent wear resistance and corrosion protection, making the aluminum flange suitable for demanding operational environments.
  • Dimensional Stability: Controlled plating process ensures minimal dimensional change, maintaining final feature tolerances after coating application.

Quality Verification

Each component underwent comprehensive inspection using CMM measurement for lobe positional accuracy (±0.015mm), flatness (≤0.01mm), and overall dimensional tolerance (±0.02mm), supplemented by coating thickness verification (15-25μm), hardness testing, and surface roughness inspection to confirm plating quality.

Industry Applications

This solution demonstrates our expertise in precision custom-shaped flanges with specialized surface treatment, ideal for:
✓ Specialized equipment interface components ✓ Precision instrument mounting systems ✓ Custom mechanical assemblies ✓ High-wear interface applications

Why Partner With Us?

• Proven complex star-shaped geometry milling expertise with multi-axis CNC capabilities
• In-house electroless nickel plating with uniform coating control
• Integrated manufacturing and surface treatment workflow for consistent quality and reliable lead times
• 12+ years of Precision machining experience across diverse equipment manufacturing sectors