Aluminum CNC machining specialists
Precision Aluminum CNC Machining with Expert Surface Finish Control
CNCALPARTS is a Shenzhen-based manufacturer focused exclusively on aluminum CNC machining. Our dedicated facility, tooling, and engineering expertise address internal stress, deformation, tool marks, and surface inconsistency before they affect your assembly.
±0.01 mm
Tightest stated tolerance
Ra 0.8–3.2 μm
Surface roughness range
6061 to 7075
Aluminum alloy expertise
Surface quality is engineered
Tool condition, vibration, cutting parameters, and finishing requirements are reviewed together.
Why it matters
Surface finish is part of part performance.
In aluminum manufacturing, a functional part and a rejected part can differ only in surface quality. Poorly managed cutting parameters or worn tooling may create chatter marks, inconsistent roughness, burrs, and assembly interference.
Tooling strategy
Aluminum-specific geometry with high-speed steel or carbide tooling helps prevent built-up edges and unstable cutting.
Vibration control
Workholding methods are selected to reduce harmonic resonance during thin-wall machining and protect finish consistency.
Parameter optimization
Spindle speed and feed rate are calibrated to the alloy, from prototype-grade 6061 to high-strength 7075.
Manufacturing capabilities
A production environment optimized for aluminum.
A single-material focus supports repeatable tooling, stable processes, and consistent surface results from prototype through production.
| Capability | Specifications |
|---|---|
| Materials | Aluminum alloys only: 6061, 7075, 5052, and more |
| Max milling size | 1000 × 600 × 500 mm |
| Tolerance | Down to ±0.01 mm |
| Surface roughness | Ra 0.8–3.2 μm |
| Minimum wall thickness | 0.5 mm |
| Inspection | CMM, surface roughness tester, and micrometer |
Engineering review
Different surfaces need different controls.
We review drawings and identify critical-to-aesthetic surfaces before selecting tool paths, final passes, and inspection priorities.
Appearance-led control
Uniform texture without avoidable rework.
Specific tool paths help eliminate visible step-over marks and inconsistent tool patterns. Final pass depth is controlled so the part is ready for bead blasting or anodizing without manual correction.
- ●Controlled tool paths for consistent visual texture
- ●Managed final pass depth for downstream finishing
- ●Attention to chatter, burrs, and visible tool marks
Performance-led control
Dimensional stability for assembly-critical areas.
For mating faces, bearing seats, and sealing areas, flatness and parallelism take priority over visual appearance. Flatness can be controlled down to 0.02 mm.
- ●Focus on flatness, parallelism, and repeatable fit
- ●Dimensional stability prioritized over cosmetic uniformity
- ●Inspection aligned to the part’s role in your assembly
From raw material to finished component
Finish options matched to the application.
Whether your components serve robotics, electronics, or optical equipment, we account for the surface preparation and coating requirements during machining.
As machined
Clean, consistent finish directly from the mill for parts where machining texture is acceptable.
Bead blasting
A uniform matte appearance that helps hide minor machining marks.
Anodizing
Clear, black, and custom color anodizing, with coating thickness considered in initial machining dimensions.
Hard anodizing
An option for industrial components requiring superior wear resistance.
Built for production continuity
The same process discipline from prototype to production.
Our single-material facility supports consistency between your first prototype and your 500th production unit, reducing design adjustments and helping keep your assembly process stable.
01
Review
Assess alloy, geometry, surfaces, tolerances, and finish requirements.
02
Prototype
Establish the tooling and parameters needed for a repeatable result.
03
Scale
Carry the validated process into production batches with stable results.
04
Document
Provide Dimensional Inspection Reports and First Article Reports for verification.
Request a quote
Bring your aluminum surface requirements to our engineering team.
We support engineering teams in robotics, automation, and industrial equipment that require reliable surface control and consistent tolerances.
Send: STEP or STP files and technical drawings
Email: info@cncalparts.com
Address:
Tell us about your project