Global OEM Aluminum Machining Supplier & Engineering Partner

Under climate-controlled machining conditions (20°C ±1°C), our multi-axis CNC machining centers routinely hold critical linear tolerances down to ±0.005 mm (±0.0002") and standard precision features to ±0.01 mm. Geometric Dimensioning & Tolerancing (GD&T) attributes such as true position, concentricity, cylindrical runout, and surface flatness can be verified to sub-micron accuracy using our in-house Zeiss CMMs. Achievable tolerances depend on wall thickness, overall part aspect ratio, and post-machining heat treatment or anodizing buildup.

Residual stress management starts at raw material selection: we prioritize stress-relieved plates such as 6061-T651 or 7075-T651 (which have undergone mechanical stretching post-solution heat treatment). In the machining process, we adopt roughing passes that remove 80–90% of material equally from alternating sides, followed by a natural or thermal stress-relief rest cycle, and finally execute ultra-high-speed finish passes with razor-sharp PCD (polycrystalline diamond) or polished micro-grain carbide tooling using high-pressure coolant to prevent thermal distortion.

Anodizing creates an oxide layer where approximately 50% penetrates into the substrate and 50% builds up on the exterior surface. For Type II anodizing (typical layer thickness 10–15 µm), the diametrical dimensional growth is approximately 10–15 µm. For Type III Hardcoat (typical layer thickness 40–50 µm), growth reaches 40–50 µm on internal or external diameters. Our CAM programmers engineer these dimensional allowances directly into pre-plating tool paths, and high-precision threads (e.g., 6H or 4H/6H fits) or press-fit bearing bores are either masked using precision silicone plugs or machined with custom oversize taps.

Yes. We specialize in low-volume high-mix (LVHM) prototyping as well as high-volume recurring serial manufacturing. For rapid prototypes, parts can be machined from solid billets within 3 to 7 business days. As volumes scale into thousands or hundreds of thousands of pieces, we transition parts to high-efficiency pallet pools, multi-station horizontal machining centers (HMCs), automated Swiss mill-turn cells, or aluminum die casting paired with CNC secondary machining to optimize cycle times and cut unit part costs.

Standard delivery documentation includes: (1) Raw material mill test certificates confirming alloy chemistry and tensile strength, (2) AS9102 Rev B First Article Inspection (FAI) reports with complete ballooned drawing correlation, (3) Zeiss CMM 3D coordinate measurement data sheets, (4) Surface roughness measurement profiles (Ra / Rz), (5) Anodizing coating thickness test reports, and (6) RoHS / REACH material compliance declarations.

We accept standard 3D solid model formats including STEP (.step, .stp), Parasolid (.x_t, .x_b), IGES (.igs), and native SolidWorks (.sldprt). To verify critical tolerances, thread classes, surface finishes, and GD&T callouts, we recommend pairing the 3D model with a detailed 2D engineering drawing in vector PDF, DWG, or DXF format. Our engineering team reviews files and returns thorough Design for Manufacturability (DFM) feedback within 24 hours.