Polishing Services for CNC Machined Parts

Elevate the quality and aesthetics of your parts with our precision polishing solutions.

From functional deburring to mirror-like finishes, we enhance both the performance and appearance of your CNC components — ready for anodizing, plating, or end-use.

CNC Polishing Surface Finish
CNC Polishing Process

What is the main purpose of polishing operation?

Polishing is a surface finishing process that improves the smoothness, appearance, and performance of CNC machined parts.

It removes tool marks, scratches, and burrs left during machining, resulting in a refined and uniform surface. Depending on the method, polishing can produce finishes ranging from matte to mirror-like gloss.

Eliminates machining marks and surface defects

Enhances aesthetic and visual quality

Improves wear resistance and performance

Prepares surfaces for anodizing, plating, or coating

Ra 0.2 μm

Mirror Finish Capability

±0.01 mm

Precision Before Finishing

Our Polishing Capabilities

We offer a full range of polishing solutions to meet both functional and cosmetic requirements for precision CNC machined parts.

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Mechanical Polishing

Uses abrasive tools to smooth surfaces efficiently. Ideal for aluminum, stainless steel, and brass parts.

  • Cost-effective solution
  • Removes tool marks
  • Suitable for most industrial parts

Mirror Polishing

Achieves a high-gloss, reflective surface for premium visual quality and optical applications.

  • Ra up to 0.2 μm
  • Luxury appearance
  • Ideal for display components
📏

Brushed Finish

Creates a uniform directional texture for a modern industrial look with anti-fingerprint properties.

  • Linear surface pattern
  • Popular in consumer products
  • Improved grip & aesthetics
🔧

Deburring & Edge Polishing

Removes sharp edges and burrs to improve safety, assembly, and overall part performance.

  • Essential post-machining step
  • Improves assembly fit
  • Enhances product safety

Materials Compatible with Polishing

We provide precision polishing services for a wide range of metals and plastics used in CNC machining, ensuring optimal surface quality across different applications.

Metals

Aluminum 6061 Aluminum 7075 Stainless Steel 304 Stainless Steel 316 Carbon Steel Brass Copper Titanium

Plastics

ABS Polycarbonate (PC) Acrylic (PMMA) Delrin (POM) Ceramics

Our CNC machining capabilities achieve tolerances up to ±0.01 mm, providing a high-quality base surface before polishing to ensure optimal finishing results.

Applications of Polished CNC Parts

Our polishing services are widely used across industries where both precision and surface quality are critical.

Aerospace Parts

Aerospace

High-performance components requiring low friction and superior surface integrity.

  • Precision brackets
  • Structural connectors
  • Custom housings
Automotive Parts

Automotive

Enhanced durability and appearance for functional and visible components.

  • Engine components
  • Interior trim parts
  • Custom metal fittings
Medical Devices

Medical Devices

Smooth, clean surfaces required for hygiene, safety, and precision applications.

  • Surgical tools
  • Implant components
  • Medical housings
Consumer Electronics

Consumer Electronics

Premium finishes for products requiring excellent visual appeal and touch quality.

  • Aluminum enclosures
  • Device frames
  • Decorative components
Industrial Machinery

Industrial Equipment

Improved wear resistance and performance for demanding industrial environments.

  • Machine components
  • Fixtures & tooling
  • Mechanical assemblies
Decorative Hardware

Decorative Hardware

High-quality finishes for architectural and decorative applications.

  • Handles & knobs
  • Metal fittings
  • Custom design parts

Polishing Services FAQ

Find answers to common questions about our CNC polishing services, including surface finishes, materials, and applications.

Still have questions?

Contact our engineering team for expert support.

Ask for Support
What surface roughness can you achieve with polishing? +
We can achieve surface finishes as low as Ra 0.2 μm depending on material type, geometry, and polishing method. Mirror polishing is available for high-end cosmetic applications.
Can polishing completely remove machining marks? +
Yes, polishing significantly reduces or completely removes tool marks, scratches, and surface imperfections, resulting in a smooth and uniform finish.
Which materials can be polished? +
We support polishing for a wide range of materials including aluminum, stainless steel, brass, copper, and selected plastics such as ABS, PC, and acrylic.
Is polishing required before anodizing or plating? +
In many cases, yes. Polishing improves surface smoothness and enhances the final appearance and adhesion quality of anodizing, plating, or coating processes.
Do you offer polishing for both prototypes and mass production? +
Absolutely. We provide polishing services for rapid prototyping, low-volume production, and full-scale manufacturing with consistent quality control.
How do I get a quote for polishing services? +
You can upload your CAD files through our website or send your RFQ directly to gemini@cnctal.com. Our engineering team will respond within 24 hours.
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