Flatness & Parallelism Control for Critical Aluminum Parts
Maintain demanding geometric tolerances across structural plates, sealing surfaces, optical mounts, and precision assemblies. CNCALPARTS manages aluminum stress, workholding, machining sequence, and inspection from first article through production.
0.02 mm
Flatness and parallelism capability
3–5 axis
Calibrated CNC systems
Aluminum only
Focused process expertise
Built around geometric stability
Material behavior is managed before, during, and after cutting so the part is evaluated in its intended geometric state.
The engineering challenge
Aluminum stress can reshape a precise design.
6061-T6 and 7075-T6 aluminum can contain internal stresses from rolling and heat treatment. When deep pockets, thin walls, or large areas of material are removed, those stresses may release and cause bowing or distortion.
Balanced removal
Tool paths distribute material removal across both sides to keep stress release symmetrical.
Stress relief
Roughing is followed by a stabilization period before critical finish machining.
Thermal control
Coolant flow and cutting parameters are monitored to limit localized heat and temporary deformation.
Process control
How we protect flatness and parallelism
Tight geometry depends on more than machine capability. Workholding, datum strategy, machining order, and inspection must work together.
Advanced workholding
Traditional clamping can create the very flatness deviation a part is meant to avoid. Vacuum chucks, custom soft jaws, and low-profile fixture plates secure the part while minimizing pressure points and induced mechanical stress.
- Supports the workpiece without forcing distortion into the setup.
- Maintains the intended geometric state during machining and release.
Parallelism control
Opposing faces are produced through controlled operation sequences, precision indexing, and multi-axis positioning. When a part must be flipped, reference datums established during the initial setup align the second side with the first.
- Reduces re-fixturing and cumulative positioning error.
- Preserves datum integrity across both machining sides.
Application fit
Geometry that supports reliable assembly and performance
Our aluminum-only process is suited to components where a stable interface surface is essential.
Base plates & mounting frames
Flatness supports stable assembly and repeatable mounting.
Sealing manifolds
Accurate surfaces help protect O-ring seal integrity.
Optical enclosures
Parallel faces support sensor and lens alignment.
Robotic structural components
Precise interfaces enable repeatable system performance.
Our aluminum-only advantage
One material category. A deeply optimized process.
General-purpose machine shops move between steel, stainless, and plastic, each requiring different tool geometries and cutting speeds. CNCALPARTS focuses exclusively on aluminum, optimizing tooling, chip evacuation, feed rates, surface finish, and inspection protocols for this material family.
The same controlled process supports a fast prototype or a batch of 500 units, helping maintain consistency from early validation through production.
| Feature | Specification |
|---|---|
| Material focus | Aluminum alloys: 6061, 7075, 6082, 5052, and more |
| Flatness / parallelism | Down to 0.02 mm |
| Typical tolerance | ±0.05 mm; precision down to ±0.01 mm |
| Machining size | Up to 1000 × 600 × 500 mm |
| Finishing | Clear, black, and hard anodizing; bead blasting; powder coating |
Quality assurance
Measured evidence for critical geometry
Flatness and parallelism are verified with calibrated CMM equipment and high-precision granite surface plates.
First Article Inspection reports +
FAI reports validate that the machining process meets print requirements before full-scale production begins.
Dimensional inspection reports +
Serialized data is available for critical features and dimensional requirements.
Surface roughness verification +
Ra values are checked against cosmetic and functional requirements.
Request a quote
Bring your flatness and parallelism challenge to our team.
Based in Shenzhen, CNCALPARTS provides high-precision aluminum machining for global engineering teams. Send STEP or SLDPRT files with your technical drawings for a formal quotation.
Email: info@cncalparts.com
Address:
Technical inquiry