Custom Aluminum Sandblasting Anodizing CNC Machining Parts

Qualify Evaluation Report

For each order we receive, we can provide a list of quality inspection reports according to your processing requirements.

Inspection  report
Full dimension report
Material Test Report

Certificate

As an experienced manufacturer of on-demand CNC machined parts, has obtained the following certifications.

ISO 9001:2015

IATF 16949:2015

ROHS Directive

12 patent certifications

More Details>>

1. What is CNC machining, and how is it used for aluminum parts?

CNC (Computer Numerical Control) machining is a precision manufacturing process where machines are programmed to cut, shape, and form materials like aluminum based on a digital design. It allows for the production of high-precision, custom aluminum parts with tight tolerances and complex geometries. After machining, aluminum parts can undergo treatments like sandblasting and anodizing to enhance both functionality and appearance.

2. What is sandblasting, and why is it used on aluminum CNC parts?

Sandblasting is a surface finishing process that involves propelling abrasive particles (like sand or glass beads) at the surface of aluminum parts to remove imperfections, create a uniform matte texture, and improve surface adhesion for subsequent finishes like anodizing. It enhances the part’s appearance by providing a clean, consistent surface.

3. What is anodizing, and why is it applied after sandblasting CNC-machined aluminum parts?

Anodizing is an electrochemical process that thickens the natural oxide layer on the surface of aluminum parts, providing enhanced corrosion resistance, wear resistance, and the ability to add color. Anodizing is commonly applied after sandblasting to protect the uniform matte surface while also improving durability and aesthetics.

4. Can custom designs be applied to CNC-machined aluminum parts that undergo sandblasting and anodizing?

Yes, CNC machining allows for fully customized designs with complex geometries, features like grooves, threads, holes, and engravings. After machining, the parts can be sandblasted to create a smooth, matte surface, followed by anodizing to add a protective layer and color.

5. What surface finishes are achievable with sandblasting and anodizing CNC aluminum parts?

1. Matte finish: Sandblasting creates a smooth, even texture with a matte appearance. Anodizing can then be applied over this matte surface to achieve a uniform, durable finish.
2. Colored anodizing: After sandblasting, anodizing can add color to the part (black, blue, red, silver, etc.), which penetrates the aluminum's surface while maintaining the matte texture created by sandblasting.
3. Gloss or satin finishes: Sandblasting combined with anodizing can produce either satin or semi-gloss finishes depending on the anodizing process and materials used.

6. What tolerances can be achieved for sandblasted and anodized CNC-machined aluminum parts?

CNC machining can achieve tight tolerances, typically within ±0.01 mm or better. However, the processes of sandblasting and anodizing add layers that slightly change the final dimensions. The anodized layer is typically 5 to 50 microns thick, and this should be considered when specifying tolerances.

7. How durable are CNC-machined aluminum parts after sandblasting and anodizing?

Aluminum parts that have been sandblasted and anodized are highly durable. Sandblasting removes surface imperfections, while anodizing adds a protective layer that increases wear resistance, corrosion resistance, and surface hardness. The anodized layer also protects against UV radiation and scratches, extending the life of the part.

8. Can prototypes be made before full production of sandblasted and anodized CNC aluminum parts?

Yes, CNC machining services often offer prototyping. You can create a prototype to test the design, fit, and surface finish (both sandblasting and anodizing) before moving into full-scale production. This ensures the part meets all aesthetic and functional requirements.

9. What information should be provided to get a quote for custom CNC aluminum sandblasted and anodized parts?

To get an accurate quote, provide:

CAD drawings or detailed design files with specific dimensions and features.

Material specifications, including the type of aluminum alloy (e.g., 6061, 7075).

Surface finish preferences, including sandblasting texture and anodizing color.

Quantity required for production.

Any specific requirements such as tolerances, mounting holes, or threaded features.

10. What are the benefits of combining sandblasting and anodizing for CNC aluminum parts?

1. Enhanced appearance: Sandblasting gives parts a clean, matte texture, while anodizing adds color and an even, protective layer.
2. Increased durability: Anodizing strengthens the surface, making it resistant to corrosion, UV damage, and wear.
3. Consistent texture: Sandblasting ensures the entire surface is uniform and free of machining marks, resulting in a more professional appearance.
4. Customizability: You can achieve a wide range of colors and finishes, allowing for aesthetic customization to match branding or product design needs.

11. What are the limitations of sandblasting and anodizing CNC aluminum parts?

1. Limited gloss: Sandblasting typically results in a matte finish, so high-gloss finishes are harder to achieve unless special polishing or clear coating is applied after anodizing.
2. Thickness considerations: Anodizing adds a layer of thickness (typically 5 to 50 microns), which can affect tight tolerances, so this must be accounted for in the design stage.
3. Color options: While anodizing offers various color options, it’s limited to certain shades, and achieving complex multicolor designs on a single part can be difficult without advanced masking techniques.

12. What is the typical lead time for custom CNC aluminum sandblasted and anodized parts?

Lead times vary based on the complexity of the design, the order quantity, and the specific surface treatments required. Typically, the lead time ranges from 2 to 6 weeks after the design is finalized. Prototypes or small batches may be produced faster, usually within 1 to 2 weeks.