Anodized Aluminum CNC Machining Service

Anodized Aluminum CNC Machining Service: Complete Guide & Specifications

What Is Anodized Aluminum CNC Machining?

Anodized aluminum CNC machining is a two-step process. First, we use computer-controlled machines to cut and shape aluminum into exact parts. Then, we add a protective layer through anodizing. This process uses electricity and chemicals to grow a tough oxide layer on the aluminum surface.

The result? Parts that are:

• Harder than regular aluminum
• More resistant to corrosion
• Better looking with many color options
• Longer lasting in tough environments

Our Materials: Only The Best Aluminum Alloys

At Istar Machining, we work with many types of aluminum, but these are our most popular choices for anodized parts:

• 6061-T6: Great all-around aluminum that’s easy to machine and anodizes well
• 7075-T6: Much stronger aluminum for parts that need extra strength
• 5052: Excellent for marine applications with superior corrosion resistance
• 2024: High-strength alloy often used in aircraft parts

Not sure which aluminum is right for your project? Our aluminum CNC machining experts can help you choose the best option.

Types of Anodizing We Offer

We provide three main types of anodizing to meet different needs:

Type I (Chromic) Anodizing

• Thinnest layer: 0.00002″-0.0001″
• Best for: Parts that need minor protection but can’t have dimensional changes
• Common uses: Aerospace components where fatigue resistance matters

Type II (Standard) Anodizing

• Medium layer: 0.0001″-0.001″
• Best for: Most common applications and colored finishes
• Common uses: Consumer products, architectural parts, decorative items

Type III (Hard Coat) Anodizing

• Thickest layer: 0.001″-0.004″
• Best for: Parts needing extreme durability
• Common uses: Military equipment, outdoor gear, high-wear components

Why Anodize Your Aluminum Parts?

Anodizing isn’t just about making parts pretty (though it does that too!). Here are the big benefits:

1. Corrosion Resistance: Anodized parts can survive over 1,000 hours in salt spray testing
2. Hardness: The surface becomes up to 4 times harder than untreated aluminum
3. Wear Resistance: Parts last longer in high-friction applications
4. Electrical Insulation: The oxide layer doesn’t conduct electricity
5. Color Options: Dyes can be added during the process for permanent color
6. Environmentally Friendly: Unlike painting, anodizing doesn’t use VOCs or harmful chemicals

Our Precision CNC Machining Process

At Istar Machining, we maintain tight control over every step:

1. Design Review: We check your files for manufacturability
2. Material Selection: We help choose the right aluminum alloy
3. CNC Programming: Our experts create optimal toolpaths
4. Precision Machining: Using 3-axis, 4-axis, or 5-axis machining as needed
5. Quality Inspection: Parts are checked against specifications
6. Surface Preparation: Careful cleaning and preparation
7. Anodizing Process: Controlled immersion in anodizing baths
8. Optional Dyeing: Adding color if requested
9. Sealing: Closing the pores of the anodized surface
10. Final Inspection: Ensuring color, dimensions, and finish meet requirements

Industries We Serve

Our anodized aluminum parts are used across many industries:

Aerospace

• Lightweight brackets and mounts
• Control system components
• Interior cabin parts
• Instrument housings

Medical

• Surgical tool handles
• Equipment housings
• Laboratory instruments
• Imaging system components

Automotive

• Engine components
• Suspension parts
• Interior trim pieces
• Performance aftermarket parts

Consumer Electronics

• Phone and laptop housings
• Heat sinks
• Camera components
• Audio equipment

Outdoor Equipment

• Bike components
• Camping gear
• Marine hardware
• Sporting goods

Common Applications

Our customers use our anodized aluminum parts for many purposes:

• Heat Sinks: The anodized coating improves heat dissipation
• Wear Parts: Hard anodizing makes parts last longer
• Decorative Components: Colored anodizing creates beautiful, lasting finishes
• Electrical Housings: The insulating properties protect sensitive components
• Marine Equipment: Corrosion resistance protects parts in salt water
• Food Equipment: Anodized surfaces are safe for food contact

Quality Assurance

At Istar Machining, quality comes first. We ensure perfect parts through:

• Dimensional Inspection: Using CMM (Coordinate Measuring Machines)
• Surface Testing: Checking anodize thickness and hardness
• Salt Spray Testing: Verifying corrosion resistance
• Color Matching: Ensuring consistent colors between batches
• Electrical Testing: Verifying insulation properties when needed

Custom Solutions For Your Needs

Every project is different. Our custom CNC machining services can handle:

• Prototypes to Production: From one part to thousands
• Simple to Complex: Basic shapes to complicated 5-axis parts
• Tight Tolerances: Down to ±0.0005″ for critical dimensions
• Special Finishes: Multiple surface textures before anodizing
• Custom Colors: Match your brand or product colors

Why Choose Istar Machining?

1. Experience: Years of expertise in both CNC machining and anodizing
2. Quality: ISO-compliant processes with thorough quality checks
3. Speed: Quick turnaround when you need parts fast
4. Support: Engineering help to optimize your designs
5. Value: Competitive pricing without sacrificing quality