Aluminum CNC Parts
Machined aluminum sourcing for OEM and distributor programs — 6061, 7075, 5052, 2024, 6063 — with milling, turning, anodizing, and full documentation.
Get Instant QuoteCapabilities at a Glance
Specs you can quote to — from alloy selection to final inspection.
| Processes | 3/4/5-axis milling, turning, turn-mill compound |
|---|---|
| Alloys | 6061, 7075, 5052, 2024, 6063 (certified material) |
| Typical Tolerance | ±0.05 mm (ISO 2768-m medium/fine) |
| Tight Tolerance | Down to ±0.01 mm for critical bores/features |
| Surface Roughness | Ra 0.8–3.2 µm (as-milled) · Ra 0.4 µm (polished) |
| Max Size (Milling) | 1200 mm × 700 mm × 500 mm |
| Max Turning | Ø450 mm × L 600 mm |
| Lead Time | Prototype: 3–7 days · Low vol: 10–15 days · Production: 3–5 weeks |
| Inspection | FAI, CMM report, Thread gauges, Sampling plan |
| Documents | CoC, Material cert, Finish cert, Inspection records |
| Export Packing | Edge protection + labeling + custom cartons/crates |
Aluminum CNC Parts Manufacturer Overview
Custom aluminum sourcing with repeatable process control.
We focus on repeatable process control — from alloy selection to machining route, finishing readiness, and documentation — so your parts match engineering drawings and purchase requirements across prototypes and reorders.
What Are Aluminum CNC Parts?
Aluminum CNC parts are precision components machined from alloys such as 6061, 7075, 5052, 2024, and 6063, produced by CNC milling and CNC turning to create defined dimensions, threads, bores, flatness, and functional interfaces.
Aluminum is often selected for its lightweight strength, machinability, and corrosion performance, while finishes such as Type II anodizing, Type III hard anodizing, bead blasting, or powder coating are chosen based on function and appearance.
To quote accurately, share drawings, quantity, alloy, finish, and any reporting requirements. We’ll return pricing plus engineer feedback on manufacturability and risk.
Typical Part Types
Machining Options for Custom Aluminum Components
CNC milling, CNC turning, and complementary processes for different geometry requirements.
CNC Milling (3-Axis & 5-Axis)
Ideal for pockets, planar faces, slots, and multi-feature geometry. 3-axis milling fits straightforward access features with controlled flatness and datum repeatability. 5-axis milling suits angled holes, complex faces, and reduced setups.
CNC Turning
Supports shafts, bushings, rings, spacers, and threaded parts with controlled concentricity and surface finish on rotational features. Thread form and fit aligned to drawing notes with gauging matched to specified class.
EDM & Secondary Cutting
Secondary processes for sharp internal geometry, thin webs, or pre-cut blanks that improve overall efficiency and downstream finishing quality.
Complementary Cutting Processes
Waterjet Cutting
Plate blanks with minimal heat input; preforms reduce milling time.
Laser Cutting
Fast profile processing for sheet stock; post-process deburring planned.
Plasma Cutting
Thick blank preparation; machining allowance defined for final tolerances.
Aluminum Alloys for Machined Parts
Common grades where strength, corrosion, machinability, and finishing guide selection.
| Alloy | Strength | Corrosion Resistance | Machinability | Typical Uses | Finishing Notes |
|---|---|---|---|---|---|
| 6061 | Medium | Good | Good | Brackets, housings, fixtures, frames | Best all-rounder. Anodizes consistently (Type II & III). |
| 7075 | High | Moderate | Good | High-load structural parts, gears | Check for distortion. Mask critical fits before anodizing. |
| 5052 | Medium | Excellent | Fair | Panels, marine enclosures, sheet work | Excellent salt spray resistance. Needs sharp tools. |
| 2024 | High | Lower | Good | Fatigue-sensitive aerospace parts | Requires Alodine or Anodizing for corrosion protection. |
| 6063 | Medium | Good | Good | Cosmetic profiles, trim, heat sinks | Optimized for surface appearance and anodizing quality. |
Aluminum 6061
Balanced choice for fixtures, brackets, housings, and frames — stable to machine and broadly compatible with anodizing.
Aluminum 7075
Chosen when high strength-to-weight matters. Process planning focuses on controlling distortion and protecting critical fits.
Aluminum 5052
Selected for corrosion-focused use cases, especially enclosures exposed to humidity or outdoor conditions.
Aluminum 2024
Used for strength and fatigue performance. Finishing strategy should consider corrosion expectations for the end environment.
Aluminum 6063
Often used where surface appearance and corrosion behavior matter, with machining tuned for dimensional consistency.
Surface Finishing for Aluminum Parts
Corrosion protection, wear resistance, and consistent appearance across batches.
Anodizing (Type II & III)
Commonly used for corrosion protection and appearance control. Masking and fit-area notes managed through drawing callouts.
- Type II: general protection, cosmetic surfaces
- Type III: wear-resistant, hard coat for functional faces
- Consider dimensional impact on bores and threads
Bead Blasting
Creates a uniform matte texture, often used before anodizing to reduce visible tool marks on cosmetic faces.
- Uniform matte surface finish
- Reduces tool mark visibility
- Compatible with subsequent anodizing
Powder Coating
Provides thicker protection and broad color options. Edge coverage and assembly clearances controlled by design notes.
- Thicker protective layer than anodizing
- Wide range of colors and textures
- Control edge coverage and clearances
Tolerances and Inspection
Cost-effective tolerance planning with inspection methods matched to acceptance criteria.
Inspection Reports
Documentation can include dimensional results, measurement references, and report formats agreed during order review.
First Article Inspection (FAI)
FAI verifies key dimensions early and reduces rework risk before full batch machining and finishing.
- Typical tolerance: ±0.05 mm (ISO 2768-m)
- Tight tolerance: down to ±0.01 mm
- CMM measurement for critical features
- Thread gauge verification (GO/NO-GO)
- CoC, material certs, finish certs per PO
Aluminum CNC Parts Gallery
Examples of machined aluminum components produced for OEM and distributor programs.
Frequently Asked Questions
Alloy selection depends on strength needs, corrosion exposure, and finishing requirements. 6061 fits general housings and structures, 7075 fits higher-load parts, and 5052 fits corrosion-priority panels/enclosures. Share load conditions and finish requirements for recommendation.
Include 3D files, 2D drawings, revision level, quantity, alloy, and finish requirements. Add notes for critical dimensions, datum scheme, cosmetic faces, and thread standards. This reduces back-and-forth and aligns inspection outputs to your receiving criteria.
Apply tight tolerances only on functional interfaces. Identify mating features (bearings, shafts, inserts) and mark critical bores, flats, and thread fits. This helps maintain fit after finishing and supports a predictable inspection plan.
Anodizing changes effective dimensions because the anodic layer adds thickness on exposed surfaces. For tight fits, specify which surfaces must be masked or compensated, and indicate Type II vs Type III. This reduces assembly interference and rework.
Options include FAI results, CMM reports, and material certificates when requested. Define which dimensions must be reported and the datum references for measurement.
Milling suits prismatic parts with pockets and faces, while turning fits rotational parts like shafts and rings. For parts with both flats and turned diameters, turn-mill routing can reduce setups. Share the drawing and feature priorities to confirm the best route.
Ready to Start Your Aluminum Project?
Submit drawings for engineer review and quote. We return pricing plus DFM notes within 24 hours.