Precision aluminum parts with controlled position and concentricity.
CNCALPARTS focuses exclusively on aluminum CNC machining for precision assembly components. We control the relationship between holes, bores, mounting surfaces, and rotating features from datum planning through final inspection.
±0.01
Dimensional tolerance, mm
0.02
Geometric tolerance, mm
1–500+
Prototype to batch quantities
6061–7075
Aluminum alloy expertise
Focus
Assembly-critical geometry
Method
Setup-controlled machining
Geometric accuracy
Build the datum strategy around your assembly.
Position and concentricity are not isolated inspection results. They depend on how the part is referenced, supported, machined, and measured throughout the process.
Datum establishment
Primary, secondary, and tertiary datums are defined from the assembly interface so bearing bores, locating holes, and mounting features remain correctly related.
One-hit machining
5-axis machining and tombstone fixtures reduce re-fixturing and help eliminate stacking errors caused by repositioning the part.
Deformation control
Custom soft jaws and vacuum fixtures distribute clamping pressure evenly, helping prevent spring-back after the part is removed.
Bore precision
Precision boring for bearing housings and locating pins provides tighter cylindricity and size control, often reaching ±0.01 mm.
Technical capability
A process optimized for aluminum assemblies.
Our 3-axis, 4-axis, and 5-axis CNC milling and turn-mill centers are configured around the thermal and mechanical behavior of aluminum alloys.
| Capability | Typical range |
|---|---|
| Materials | Aluminum alloys only: 6061, 7075, 6082, 2024, 5052, 5083 |
| Machining types | CNC milling, CNC turning, turn-mill |
| Maximum milling size | 1000 × 600 × 500 mm |
| Maximum turning diameter | Ø300 mm |
| Dimensional tolerance | ±0.01 mm to ±0.05 mm |
| Geometric tolerance | Flatness, parallelism, position, and concentricity down to 0.02 mm |
| Surface roughness | Ra 0.8–3.2 μm |
| Minimum wall thickness | 0.5 mm |
| Minimum hole diameter | Ø1.0 mm |
Production workflow
From design validation to repeatable production.
Prototype and production requirements are handled differently, while both use the same high-precision manufacturing foundation.
Prototypes · 1–10 pcs
Fast turnaround and design validation
The same high-precision equipment used for production helps make prototypes representative of the final part.
Low volume to batch · 10–500+ pcs
Stable processes for repeat orders
Repeatable fixtures, standardized inspection routines, machine programs, and offset data help the 1,000th part match the first.
Beyond machining
Finishing that supports function and appearance.
Aluminum surface treatments are selected according to cosmetic, wear, and environmental requirements.
As machined
Natural finish with controlled tool marks.
Bead blasting
Uniform matte finish that hides machining lines.
Anodizing
Clear, black, and color Type II anodizing.
Hard anodizing
Increased surface hardness and wear resistance.
Additional treatments
Powder coating, chemical film, chromate conversion, and brushing.
Quality control
Evidence for every critical relationship.
We verify geometric tolerances with measurement equipment suited to complex aluminum components and can provide inspection documentation before shipment.
CMM inspection
Automated coordinate measurement for complex geometric relationships.
Precision gauging
Bore, pin, and thread gauges for hole-to-hole relationships.
Documentation
Dimensional Inspection Reports and FAI reports upon request.
Common questions
Planning a precision aluminum component?
Request a quote
Bring your position and concentricity requirements to our engineering team.
We support manufacturers, robotics companies, and engineering firms worldwide. Send your 3D models and technical drawings for review.
Email: info@cncalparts.com
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