Precision Aluminum CNC Machining & Type II Anodizing Services
CNCALPARTS specializes exclusively in custom aluminum parts, combining material-specific CNC machining with controlled Type II anodizing for durable, consistent, production-ready components.
3 / 4 / 5-axis
Machining platforms
±0.01 mm
Precision tolerance
1–10 pcs+
Prototype to production
Material focus
Aluminum alloys only
Finish control
In-house Type II anodizing
Type II anodizing
A controlled porous oxide layer for protection and appearance
Type II anodizing, also known as sulfuric acid anodizing, forms a controlled oxide layer on the aluminum surface. Its porous structure supports dye absorption, while the resulting finish improves corrosion resistance and provides a uniform appearance.
Surface hardness
A durable finish suited to handling and mild wear environments.
Corrosion resistance
Significant protection against environmental degradation in standard service conditions.
Color consistency
The porous layer supports clear, black, and various custom dyed colors.
Dimensional planning
Pre-anodizing dimensions account for layer growth so final parts meet specified tolerances.
Application fit
Built for functional aluminum assemblies
Type II anodizing is frequently specified where appearance, corrosion resistance, and a durable surface need to work together.
Discuss your part requirementsElectronics enclosures
Housings requiring electrical isolation, corrosion protection, and a clean cosmetic finish.
Robotics and automation
Structural brackets and components that benefit from wear resistance and consistent appearance.
Industrial equipment
Aluminum parts exposed to standard industrial environments and routine handling.
If your design requires specific coating thickness or electrical conductivity requirements, include those details in your drawing notes.
Machining specifications
Aluminum CNC capacity at a glance
Our 3-axis, 4-axis, and 5-axis equipment supports complex geometries including thin-wall housings, heat sinks, and precision-turned components.
| Capability | Typical range |
|---|---|
| Primary material | Aluminum alloys only: 6061, 6063, 6082, 7075, 2024, 5052, 5083 |
| Milling size, maximum | 1000 × 600 × 500 mm |
| Turning, maximum diameter / length | Ø300 mm / 500 mm |
| General tolerance | ±0.05 mm |
| Precision tolerance | Down to ±0.01 mm |
| Surface roughness | Ra 0.8–3.2 μm |
| Minimum wall thickness | 0.5 mm |
| Minimum hole diameter | Ø1.0 mm |
Why aluminum only
Specialization that supports repeatable results
Aluminum behaves differently from steel and plastic. CNCALPARTS focuses exclusively on aluminum to refine workholding, tooling, cutting parameters, and deformation control around the material.
Deformation control
Material-specific workholding strategies help minimize internal stress release and distortion in thin-wall parts and large pockets.
Tooling and cutting parameters
Feeds, speeds, and coolant application are optimized for aluminum's thermal conductivity and chip evacuation requirements.
Surface finish consistency
Processes from bead blasting to Type II and hard anodizing are calibrated for visual and dimensional consistency across batches.
Quality control
Inspection aligned with your drawing
Drawings, tolerance callouts, and surface requirements are reviewed before production begins. Critical dimensions are verified against your specifications before parts leave the facility.
Documentation available
Production evidence for your approval process
Dimensional Inspection Reports and First Article Reports are available upon request to support incoming inspection and production release.
Request inspection detailsProject workflow
From early design evaluation to recurring production
We support projects from 1–10 piece prototypes through recurring production volumes of 500+ parts.
Share design data
Send 3D models in STEP, STP, SLDPRT, or X_T format together with PDF or DWG drawings.
Confirm requirements
Specify alloy, finish, quantity, critical tolerances, coating thickness, or conductivity requirements.
Review and produce
We review the design, plan machining and anodizing, then manufacture and inspect to the agreed requirements.
Technical questions
Type II anodizing considerations
Start a project
Request an aluminum CNC and Type II anodizing quote
Send your files and requirements for a review covering manufacturability, machining, surface finish, and inspection needs.
Preferred file formats
STEP, STP, SLDPRT, X_T, PDF, and DWG
CNCALPARTS
Aluminum CNC Machining Specialists · We Machine Aluminum. Only Aluminum.