Precision 7021 Aluminum CNC Machining Services
CNCALPARTS is a manufacturing facility based in Shenzhen, China, dedicated exclusively to aluminum CNC machining. By focusing solely on this metal, we have optimized our tooling, workholding, and thermal management specifically for the unique characteristics of aluminum alloys, including high-strength grades like 7021.
We support engineers and procurement teams in the robotics, automation, and industrial equipment sectors who require consistent, high-tolerance aluminum components—from initial prototypes to volume production runs.
Machining 7021 Aluminum for High-Performance Applications
7021 aluminum is a zinc-based alloy prized for its high yield strength and excellent stress-corrosion cracking resistance. It is often the preferred choice for structural components that must withstand significant mechanical loads while maintaining a low mass.
However, machining 7021 requires specific expertise to manage internal stress and prevent warping. At CNCALPARTS, we utilize specialized cutting parameters and strategic stress-relief techniques to ensure your parts maintain their dimensional integrity after material removal.
Whether you are designing structural frames, high-load brackets, or precision housings, we ensure your 7021 components meet strict engineering requirements.
High Yield Strength
Load-bearing capability at low mass
Corrosion Resistant
Resists stress-corrosion cracking
Stress-Relief Ready
Dimensional integrity after machining
Technical Capabilities & Specifications
Our facility is equipped for 3-axis, 4-axis, and 5-axis machining to handle complex geometries and thin-wall designs.
| Capability | Specification |
|---|---|
| Material Focus | Aluminum Alloys (6061, 7075, 7021, 2024, etc.) |
| Tolerance | Down to ±0.01 mm |
| Max Milling Size | 1000 × 600 × 500 mm |
| Max Turning Diameter | Ø300 mm |
| Surface Roughness | Ra 0.8–3.2 µm |
| Min Wall Thickness | 0.5 mm |
| Inspection | CMM, Micrometers, Height Gauges, Thread Gauges |
Why Specialized Aluminum Focus Matters
Many machine shops treat aluminum as just one of many materials in their catalog. Because we machine aluminum exclusively, our entire workflow is calibrated to solve the specific challenges of this material.
Deformation Control
We account for internal stress release in 7021 and 7075 alloys, ensuring that thin-wall parts and deep pockets remain within tolerance after machining.
Tooling Optimization
By using dedicated aluminum-grade tooling and high-speed machining paths, we achieve superior surface finishes and reduce burr formation.
Anodizing Readiness
We prepare surfaces specifically for anodizing, ensuring that clear, black, or hard-anodized finishes are uniform and meet aesthetic and protective standards.
From Prototype to Production
We assist at every stage of your product development cycle. If you are in the design phase, our team provides feedback on manufacturability to reduce costs and improve part performance.
As your project moves to low-volume or full-scale production, we implement stable, repeatable setups that ensure every piece in your batch matches the quality of your first article.
Surface Finishing Options
- As Machined: Clean, deburred components straight from the CNC.
- Bead Blasting: Uniform matte finish to hide machining marks.
- Anodizing: Standard and Hard Anodizing (Type II & Type III) for wear resistance and corrosion protection.
- Chemical Film / Chromate: For conductive grounding or improved paint adhesion.
Request a Quote
We partner with engineering teams that require reliable, high-quality aluminum CNC parts without the administrative overhead of dealing with generalist shops. We do not machine steel, brass, or titanium—we focus entirely on mastering aluminum.
To receive an accurate quote and lead time estimate, please send your 3D models (STEP/STP) and 2D technical drawings (PDF) to our engineering team.
- info@cncalparts.com
- Facility Address
Please include your required quantity, material grade (e.g., 7021), and any specific surface finish requirements in your request.