Precision Aluminum CNC Machining: Expert Pocket Design and Manufacturing
CNCALPARTS is a Shenzhen-based precision machine shop focused exclusively on custom aluminum components. By specializing only in aluminum, we have refined our processes for tooling, chip management, and deformation control, ensuring high-quality results for robotics, automation, and industrial equipment manufacturers.
- Tolerance
- ±0.01 mm
- Axes
- 3 / 4 / 5
- Max Size
- 1000 mm
Why We Focus Exclusively on Aluminum
General machine shops often balance the requirements of steel, plastics, and titanium. We do not. Our entire workflow—from workholding strategies to coolant selection—is optimized for aluminum alloys like 6061, 7075, and 5083.
This focus allows us to maintain tighter tolerances, better surface finishes, and faster turnaround times on complex housings, frames, and heat sinks.
6061
General purpose alloy, excellent machinability
7075
High strength for demanding structural parts
5083
Superior corrosion resistance and weldability
Optimizing Pocket Design for CNC Machining
Deep pockets are common in aluminum enclosures and housings, but they present specific manufacturing challenges. To reduce machining time, minimize vibration, and improve cost-efficiency, follow these design guidelines.
Corner Radii
Avoid sharp internal corners. A tool cannot machine a corner sharper than its own radius. Designing internal corners with a radius of at least 10–20% of the pocket depth significantly improves machining speeds and tool life.
Depth-to-Width Ratio
Deep, narrow pockets cause tool deflection and chatter. Aim to keep pocket depths no more than 4–6 times the diameter of the end mill. For deep cavities, provide as much clearance as possible for chip evacuation.
Bottom Radii
Avoid flat-bottomed pockets with perfectly square corners where the floor meets the wall. A small radius at the base allows for a stronger tool profile, preventing premature breakage.
Wall Thickness
Aluminum is prone to distortion during machining. For thin-wall features, a thickness of at least 0.8 mm to 1.0 mm is recommended to ensure structural integrity and prevent "oil-canning" or vibration.
Quick Reference: Deep-Cavity Design Targets
Internal Corner Radius
≥ 10–20% of depth
Depth : Tool Diameter
4–6 : 1 max
Bottom Radius
Always > 0
Thin-Wall Thickness
0.8–1.0 mm min
Our Manufacturing Capabilities
We support projects from rapid prototypes to low-volume production batches, with the specifications below.
| Capability | Specification |
|---|---|
| Machining Types | 3, 4, & 5-Axis Milling, CNC Turning |
| Tolerance | Down to ±0.01 mm |
| Surface Roughness | Ra 0.8–3.2 μm |
| Max Milling Size | 1000 × 600 × 500 mm |
| Supported Materials | 6061, 6063, 6082, 7075, 2024, 5052, 5083 |
Surface Finishing for Aluminum
We provide a full suite of finishes to meet both cosmetic and functional requirements.
-
Anodizing
Clear, black, and custom colors. We manage the dimensional offsets required for anodizing buildup.
-
Hard Anodizing
For increased wear resistance in mechanical components.
-
Bead Blasting
To achieve a uniform, matte aesthetic.
-
Chemical Film (Chromate Conversion)
For electrical conductivity and corrosion resistance.
Precision Quality Control
Every part undergoes rigorous inspection. We utilize CMMs, height gauges, and thread gauges to verify all critical dimensions against your provided technical drawings. We supply First Article Inspection (FAI) reports and dimensional reports with every production order to ensure consistency across batches.
Prototype to Production Workflow
We work directly with engineering teams who require reliable, repeatable aluminum parts.
-
1
Prototypes
We prioritize fast setup to help you validate your design quickly.
-
2
Low-Volume / Batch
We focus on process stability, using optimized fixtures to ensure the 500th part matches the first.
Working with CNCALPARTS
Our shop is structured for B2B partners who need a dedicated aluminum supplier. We communicate directly with your engineering team to resolve design-for-manufacturability (DFM) issues before production begins.
If you are a manufacturer in robotics, automation, or industrial technology and require high-precision aluminum components, we invite you to review your project with us.
Request a Quote
To receive a competitive quote, please send your 3D models (STEP or STP files) and 2D technical drawings (PDF) to info@cncalparts.com.
CNCALPARTS
Aluminum CNC Machining Specialists
- Address
- Phone
- info@cncalparts.com