Surface Finishing Services for CNC Machined Parts
At JYH Precision Machining, we provide professional surface finishing services for CNC machined parts to enhance appearance, improve corrosion resistance, increase wear performance, and meet strict industrial requirements. Whether your component is made from aluminum, stainless steel, titanium, magnesium, or plastic, our finishing solutions ensure your parts are ready for real-world applications—functional, durable, and visually premium.
Surface finishing is not only about making parts look better—it directly affects product lifespan, friction performance, environmental resistance, conductivity, and assembly quality. Our finishing processes are widely used for aerospace, robotics, automotive, electronics, medical devices, UAV components, and industrial equipment.
Why Surface Finishing Matters in Precision Machining
Even with high-precision CNC machining, the raw part surface may still have tool marks, oxidation sensitivity, and limited protection from wear or corrosion. Surface finishing provides:
- Corrosion resistance (salt spray protection)
- Improved wear resistance & hardness
- Better appearance and uniform color
- Reduced friction for moving components
- Improved paint adhesion and bonding
- Electrical insulation or conductivity (depending on process)
- Better cleanability for medical and electronic parts
Surface finishing is often the final step that transforms a machined part into a production-ready component.
Our Surface Finish Capabilities
Metal Surface Finishing
- Anodizing (Type II / Type III Hard Anodizing)
- Black Anodizing / Color Anodizing
- Hard Coat Anodizing
- Powder Coating
- Electroplating (Nickel / Chrome / Zinc)
- Electroless Nickel Plating
- Passivation (Stainless Steel)
- Sandblasting / Bead Blasting
- Brushing / Satin Finish
- Polishing / Mirror Finish
- Laser Marking
- PEO Coating (Micro Arc Oxidation)
- Chemical Oxidation / Blackening
- Heat Treatment (Optional for strength improvement)
Plastic Surface Finishing
- Painting / Coating
- Polishing
- Texture finish
- UV coating
Anodizing Services (Most Popular Finish for Aluminum CNC Parts)
Anodizing is one of the most demanded surface finishes in modern CNC machining. It creates a controlled oxide layer on aluminum parts, increasing corrosion resistance and improving surface hardness.
At JYH, we provide:
- Clear anodizing
- Black anodizing
- Color anodizing (red, blue, green, gold, purple, etc.)
- Hard anodizing (Type III) for wear resistance
Anodizing is commonly used in:
- UAV housings and brackets
- Consumer electronics shells
- Automotive lightweight parts
- Industrial enclosures
- Optical and camera components
Available Anodizing Colors
We support a wide range of anodizing colors for aluminum CNC parts, including:
- Black
- Red
- Blue
- Green
- Gold
- Orange
- Purple
- Grey
- Natural / Clear
Custom colors can be developed depending on project requirements and batch quantity.
Surface Finish Options Comparison
| Surface Finish Type |
Suitable Material |
Main Advantage |
Wear Resistance |
Corrosion Resistance |
Appearance |
Typical Applications |
| Type II Anodizing |
Aluminum |
Decorative + corrosion protection |
Medium |
High |
Excellent |
Electronics housings, panels |
| Hard Anodizing (Type III) |
Aluminum |
High hardness & wear resistance |
Very High |
Very High |
Matte / Dark |
Aerospace, mechanical components |
| Powder Coating |
Aluminum / Steel |
Thick protective layer |
High |
High |
Premium color |
Automotive, outdoor equipment |
| Electroless Nickel Plating |
Steel / Aluminum |
Uniform coating thickness |
High |
Very High |
Metallic |
Precision mechanical parts |
| Chrome Plating |
Steel |
High wear + shiny surface |
Very High |
High |
Mirror |
Shafts, industrial components |
| Zinc Plating |
Steel |
Rust protection |
Medium |
Medium |
Bright metallic |
Fasteners, brackets |
| Passivation |
Stainless Steel |
Improves corrosion resistance |
Medium |
High |
Natural metal |
Medical, food-grade parts |
| Sandblasting / Bead Blasting |
Aluminum / Steel |
Removes marks + matte texture |
Low |
Low |
Matte |
Pre-anodizing preparation |
| Polishing |
Aluminum / Stainless |
Smooth reflective finish |
Low |
Medium |
Mirror-like |
Decorative parts, optics |
| PEO Coating (MAO) |
Magnesium / Aluminum |
Ceramic-like extreme durability |
Extremely High |
Extremely High |
Grey / Ceramic |
UAV parts, high wear |
Surface Finish Tolerance & Quality Control
Surface finishing is a precision process. Thickness variation can affect assembly, fit, and tolerance. At JYH Precision Machining, we control:
- Coating thickness consistency
- Color uniformity (batch control)
- Adhesion performance
- Surface roughness requirements
- Visual inspection (scratches, stains, burn marks)
- Salt spray resistance testing (upon request)
We also support masking for threaded holes, sealing areas, bearing surfaces, and electrical contact zones.
Typical Surface Roughness Options
| Surface Type |
Roughness (Ra) Range |
Notes |
| Standard CNC machining |
Ra 1.6-3.2 μm |
Visible tool marks |
| Fine CNC machining |
Ra 0.8-1.6 μm |
Better cosmetic surface |
| Polishing finish |
Ra 0.2-0.8 μm |
Smooth surface |
| Mirror polishing |
Ra ≤ 0.2 μm |
High-end reflective finish |
| Bead blasted surface |
Ra 1.2-3.5 μm |
Matte, uniform texture |
Best Surface Finish Selection Guide
If You Need Corrosion Resistance
- Anodizing
- Electroless nickel plating
- Passivation
- Powder coating
If You Need Wear Resistance
- Hard anodizing (Type III)
- Chrome plating
- PEO coating
- Nickel plating
If You Need Premium Appearance
- Color anodizing
- Powder coating
- Brushing + anodizing
- Polishing + anodizing
If You Need Electrical Insulation
- Anodizing
- PEO ceramic coating
- Powder coating
If You Need Conductive Surface
- Nickel plating
- Chrome plating
- Selective masking anodizing
Industries We Support
Aerospace & UAV Components
Surface finishes for lightweight aluminum and magnesium parts, ensuring corrosion resistance and wear durability.
Automotive & New Energy Vehicle Parts
High-performance coating for structural parts, battery housings, brackets, and precision assemblies.
Consumer Electronics
Color anodizing and cosmetic finishing for premium housing parts and frames.
Medical Devices
Passivation and clean finishing processes suitable for hygienic environments.
Robotics & Automation
Hard anodizing and plating for wear-resistant moving assemblies.
Materials We Can Finish
We provide surface finishing for a wide range of materials:
- Aluminum (6061, 6063, 7075, 5052, etc.)
- Stainless Steel (304, 316, 17-4PH)
- Carbon Steel
- Titanium Alloy
- Magnesium Alloy
- Brass & Copper
- Engineering Plastics (ABS, PC, Nylon, POM, PEEK)
Why Choose JYH Precision Machining for Surface Finishing?
One-Stop Manufacturing Solution
We provide CNC machining + finishing in one workflow, reducing lead time and risk.
Stable Quality for Batch Production
We maintain strict process control to ensure color stability and consistent coating thickness across batches.
Professional Engineering Support
Our engineering team helps customers choose the right surface finish based on function requirements, working environment, wear and friction conditions, corrosion exposure, and appearance expectations.
Cost-Effective & Fast Turnaround
From prototype to mass production, we offer competitive finishing solutions without compromising quality.
Surface Finishing Customization Options
We support customer requirements such as:
- Custom colors (Pantone matching for large orders)
- Matte or glossy textures
- Logo laser marking
- Masking for functional areas
- Multi-step finishing (blast + anodize / polish + plating)
- Assembly-ready packaging
Common Surface Finish Defects We Control
To ensure premium quality, we strictly avoid and control:
- Color inconsistency
- Anodizing burn marks
- Coating peeling
- Micro scratches
- Chemical stains
- Thickness mismatch affecting assembly fit
- Poor adhesion on edges and corners
Our QC process includes visual inspection, thickness checking, and random batch sampling.
Applications of Our Finished CNC Parts
Our finished CNC parts are commonly used for:
- UAV structural frames & housings
- Handheld device enclosures
- Automotive brackets and mounts
- Industrial machine covers
- Camera and optical components
- Medical instrument housings
- Heat sink parts
- Robotics structural components
Surface Finishing Service Workflow
- CNC Machining
- Deburring
- Surface Preparation (blasting / polishing / brushing)
- Cleaning & Degreasing
- Surface Treatment Process
- Sealing / Curing
- Inspection
- Packaging & Delivery
This process ensures clean, stable, and repeatable finishing performance.
Request a Quote for Surface Finishing Services
If you are looking for a reliable supplier for CNC machining surface finishing, anodizing, powder coating, plating, or custom finishing, JYH Precision Machining is ready to support your project.
We provide fast quotation, professional engineering support, and stable production quality for both prototypes and bulk orders.
