Aluminum for CNC Machining | Million Bright CNC

When to Use Aluminum

Aluminum is a go-to choice for many CNC parts because it offers strong mechanical performance at low weight, excellent machinability, and a wide range of finish options. It is commonly used for housings, brackets, fixtures, and precision components.

Common Uses

Enclosures and housings for electronics
Brackets, mounts, and structural parts
Robotics components and fixtures
Prototype parts needing fast iterations

Pros

Excellent machinability and fast cycle times
High strength-to-weight ratio
Good corrosion resistance (improved with anodize)
Great cosmetic finish options

Cons

Lower high-temperature performance vs steel
Thread strength can be limited in softer grades
Hard anodize can affect tight fits if not planned

Common Aluminum Options

6061

7075

6061 is a versatile default for many parts. 7075 is stronger and often used where higher strength is required.

Machining Tips

Define cosmetic surfaces and edge break requirements early
Plan anodize thickness for holes, threads, and tight fits
Use consistent datums and tolerances on critical interfaces
Consider inserts for threads in high-cycle assemblies

Recommended Finishes

Popular aluminum finishes include anodize (Type II/III), bead blast, and paint/powder coat depending on requirements.

Explore Finishes

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Aluminum