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CNC Machining Surface Finishes

Discover the 15+ surface finishing options
available for your CNC projects.

CNC surface finishing services
ISO accredited & QC checks
Rapid prototyping and full-scale production
All in-house processes
CNC metal & plastics

As Machined

Our standard finish is “as machined.” All sharp edges are removed and deburred for safe handling. Tool marks are visible.

As machined cnc machined part with a deburr finish

CNC Chemical Finishes

Chemical finishes are used to increase a part’s durability, improve thermal stability, alter conductivity level or extend its life span.

Material CompatibilityColourDescription
AnodizingAluminium, titaniumGold, red, blue, black, clear, etc.Anodising is used to increase surface hardness, wear resistance and the lifespan of metals like Aluminium.
AlodineAluminiumClear, yellowAlodine is a chromate conversion coating applied to improve corrosion resistance and help preserve electrical conductivity.
Black OxideSteel, copper, aluminium, etc.Heavy blackBlack oxide is a coating used to improve corrosion resistance and minimize light reflection.
ElectroplatingMetals & plasticsMetallicElectroplating is used for maintenance or purely decorative purposes. We can coat your parts in chrome, zinc, nickel, etc.
Electroless Nickel PlatingSteel, stainless steel, copper, etc.Silver white semi-brightElectroless nickel plating is a smooth and uniform coating that offers very good wear, abrasion and corrosion resistance.
PassivationStainless steelVery light bluePassivation is used to enhance the corrosion resistance of CNC metal parts, especially of stainless steel components.

CNC Mechanical Finishes

Mechanical finishing is a process that involves generation of different-looking surface textures on metal by buffing, brushing, tumbling. or bead blasting the surface.

 

Material CompatibilityColourDescription
Bead BlastingMetals & PlasticsRaw material colourGlass bead blasting adds a uniform matte or satin surface finish. It’s great for removing tool marks and surface contaminants.
BrushingMetalsN/ABrushing is produced by polishing the metal grit resulting in a unidirectional satin finish.
Powder CoatingMetalsBlack, RAL/Pantone coloursPowder coating is a dry finishing process that results in a smooth finish and creates a hard finish that is tougher than conventional paint.
PaintingMetals & plasticsBlack, RAL/Pantone coloursPainting is a well-known way to add colour. Overall, it is a great choice to improve the aesthetics of cnc machined parts.
PolishingMetals & plastics (especially PMMA)N/AWe can hand polish your CNC metal and plastic parts to achieve a smooth finish. It creates a slightly reflective surface.
SandblastingMetals & plasticsRaw material colourSandblasting adds a uniform matte or satin surface finish. It’s mainly used for visual purposes and comes in several different grits.
Spray PaintingMetals & plasticsBlack, RAL/Pantone coloursSpray painting is a great way to add colour. It is more durable and provides a more even surface than traditional painting.
SmoothingMetals & plasticsN/ASmooth machining can be applied to the part to reduce its surface roughness. Machine marks are less evident but still visible.

 

This list features common CNC finishes. For other custom finishes, such as as water transferring and more, please contact us at info@hlhrapid.com.

 

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