Automotive CNC Machining Case Study｜Polished & Anodized Mirror-Finish Parts

2025-10-10

1. Customer Background

Our client is an automotive manufacturer from the United States, specializing in high-end motorcycle and car components.

They required a series of parts with exceptionally high surface quality and precision, featuring multiple surface treatment options, such as:

The customer provided Pantone color samples to ensure color accuracy and consistency across all anodized parts.

Item	Description
Part Name	Motorcycle control lever and related components
Material	Aluminum 6061, Stainless Steel 304
Machining Process	CNC turning & milling, 5-axis machining, CNC machining center
Precision Requirement	±0.01mm
Surface Treatment	Polishing, Anodizing, Chrome Plating
Keywords	CNC precision machining, anodized aluminum parts, automotive components, mirror surface finishing

During production, we faced several challenges:

Multi-process surface finishing compatibility — Combining polishing with anodizing or chrome plating risked color inconsistency and uneven reflection.
High-gloss surfaces easily scratched — Handling, clamping, and inspection could cause micro-scratches if not properly protected.
Tight dimensional tolerance — The control lever’s critical assembly areas required ±0.01mm accuracy.