Anodized CNC Machined Parts

Sochain Precision provides anodized CNC-machined aluminum parts for industries such as aviation, automotive, and electrical. Our capabilities include:

ISO 9001 quality system in place
Short lead time, as long as 3 - 7 days
Full traceability during production
Machining and finishing are handled together
Easy sourcing from prototype to batch
Aluminum alloys such as 6061-T6, 6063-T6, 7075-T6, 5052, and 2024
Protective anodized surface for harsh use
Supports both small runs and volume orders

Rapid prototyping and full-scale production

ISO accredited & QC checks

All in-house processes

Used in over 50 countries

FREE Instant quotations

What Makes Sochain Precision a Reliable Choice for Anodized CNC Machining?

We employ precision machining and finishing so the parts keep their size, fit, and surface protection in actual working conditions.

Practical Lead Times

Lead time is dependent on finishes and geometry.

Anodizing usually takes between 5 and 10 days in general
Production batches are often planned based on quantity
We predict the timing after inspecting and approving your drawings

Controlled Machining Accuracy

We machine parts based on stable datums and proper workholding. Typical machining tolerance is ±0.01–0.02 mm on functional features, depending on part size and geometry. This helps parts assemble without rework.

Prototyping to Recurrent Parts

We keep standards in record and perform the same machining layout and anodizing path as the samples in the batch. This allows us to keep the regularity as you raise your volume/quantity.

Standard Anodizing Options Available

We support common industrial anodizing types such as:

Type II anodizingfor general corrosion protection and color finish.Type III hard anodizingfor wear resistance and higher surface hardness.PTFE sealed hard anodizingfor low-friction sliding parts.

We help you choose the right type based on how the part will actually be performed.

Inspection before Shipment

Dimensions and coating conditions are verified and then packed. During packaging, the parts are kept safe against the dangers of being damaged on the surface during transportation.

Anodizing Options We Offer

At Sochain Precision, we provide various anodizing types to match different performance needs. The table below helps you quickly compare thickness, finish, and typical use cases.

Factor

Type II Anodizing

Type III (Hardcoat)

Type III with PTFE

Applicable Material

Aluminum

Common Colors

Clear, black, red, blue, gold

Clear (grey look), black

Black

Surface Texture

Smooth, matte

Very smooth, matte

Typical Thickness

1.8–25 μm (0.00007"–0.001")

≥ 0.0005" (up to ~0.004")

Similar to Type III

Wear Resistance

Moderate

High

High with low friction

Corrosion Protection

Good

Excellent

Effect on Tolerances

Minimal impact

May affect tight fits

Electrical Conductivity

Insulating

Best Use Cases

Cosmetic + basic protection

Heavy wear environments

Wear + low friction parts

Lead Time (Typical)

Short

Medium

Notes

Does not hide machine marks

Masking often required

Often used with blasting/tumbling

Anodizing Standards We Follow

Our anodizing processes align with widely accepted industry and military specifications. The list below shows the common standards we support for aluminum CNC parts.

Standard Category

Specifications

Typical Scope

Military Spec

MIL-PRF-8625 Type I, Class A

Chromic acid anodizing

Military Spec

MIL-PRF-8625 Type I, Class B

Chromic acid with dye options

Military Spec

MIL-PRF-8625 Type I, Class C

Specialized chromic variants

Military Spec

MIL-PRF-8625 Type II

Sulfuric anodizing (standard)

Military Spec

MIL-PRF-8625 Type III

Hardcoat anodizing

ASTM Standard

ASTM D1730

Evaluation of anodic coatings

ASTM Standard

ASTM B580

Sealing quality check

SAE Standard

SAE AMS 2469 Rev J

Engineering anodize spec

Architectural Spec

AAMA 611 Class A4

High-performance anodic finish

Architectural Spec

AAMA 611 Class A3

Standard architectural finish

ASTM Standard

ASTM D3933-98

Coating performance testing

ASTM Standard

ASTM B580 (duplicate reference)

Seal quality verification

If your project calls for a specific or customer standard, Sochain Precision can match it on your request. Please contact us beforehand and discuss all requirements in time.

Industries We Serve with Anodized CNC Machined Parts

At Sochain Precision, we produce components for customers from various sectors such as automotive, aerospace, electronics, and robotics. We entertain prototype development and low-to-mid volume production runs.

Aerospace Components

We machine lightweight aluminum components that are typically used in brackets, housings, and structural supports. The process improves corrosion resistance and part surface durability.

Automotive Systems

Our anodized components also support engine bays, interior components, and performance-specific, custom components. The finish assists in preventing wear and chemical attacks, so parts perform better outdoors.

Electronics & Enclosures

We manufacture accurate housings, heat sinks, and covers for electronic appliances. Anodizing adds electrical insulation and gives parts a cosmetic finish.

Electrical Equipment

Anodizing imparts controlled oxide layers, which are beneficial in bus bars, connectors, and support parts. It strengthens surface protection while keeping part dimensions within tolerance.

Industrial Machinery

Our factor also produces custom parts for fixtures and tooling parts. Anodizing helps prolong the life of components that need to perform under abrasive and high-use environments.

Robotics & Automation

In robotic systems, precision is important yet critical. Our CNC-machined parts hold tight tolerances and are used in robotic arms, machine frames, and automation assemblies.

Medical Support Hardware

When no inserts are present, we machine clean and consistent aluminum parts. The anodized layer improves surface stability and appearance.

Protect Critical Features with Sochain Precision Anodizing Masking

During anodizing, some parts should remain undisturbed to remain fit and be able to work properly. Critical features such as threads, precision bores, and sealing of surfaces are safeguarded during masking. We look at your drawings and mask any areas that have tight tolerances.

When Masking Is Needed

Here are the cases where masking is usually necessary:

Stringent-tolerance threaded holesPrecision reamed boresElectrical surfaces of contactSealing or mating facesFunctional sliding areas

Even Type II coatings, which are slightly thinner, can vary in dimensions a bit, and we would never overlook critical features during DFM review.

How We Apply Masking

We understand the masking and apply it based on your geometry and tolerance requirements.

Thread and hole plugs made of plasticWe use high-temperature masking tape on flat surfaces where protection is required during anodizing.Special parts have custom solutions

If any area needs masking, clearly mark it on your drawing with notes and highlight the surfaces that must be protected.

Other Finishes Available at Sochain Precision

Besides anodizing, we also favor various other secondary finishing options: Some common examples include:

Alodine (chemical conversion coating)Hand polishingPassivationZinc platingBlack oxideHeat treatmentPowder coatingElectroless nickel plating (ENP)Media blastingTumblingElectropolishingNickel platingVapor polishing

If you are not sure about the finish to use for your part, our staff can review your design and suggest the most suitable finish for your project.

FAQ’s

Will anodizing change my part dimensions?

Yes, anodizing adds controlled oxide thickness to the surface. A portion of the coating grows outward, and a portion penetrates the base metal. For tight fits, you should consider thickness during design, especially with hardcoat anodizing.

Which aluminum alloys anodize best?

Alloys like 6061 and 6063 usually provide a uniform coating layer. High-silicon or high-copper alloys may produce darker and uneven finishes. Material selection should match both functional and cosmetic requirements.

How do I choose between Type II and Type III anodizing?

Type II works well for corrosion protection and cosmetic color finishes. Type III (hardcoat) is better for wear resistance and heavy-duty use. The right anodizing choice depends on load, environment, and tolerance needs.

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