Surface Finishing Service

CNC parts are delivered directly after CNC milling or turning. The surface of the parts retains uniform machining tool marks and no additional mechanical or chemical treatment is performed.

• Key Features: Lower cost, shorter lead times, minimal dimensional variation
• Suitable Materials: Aluminum, steel, stainless steel, copper, titanium, engineering plastics
• Surface Roughness Reference: Typically Ra 3.2 μm; Ra 1.6 μm or Ra 0.8 μm can be specified
• Typical Applications: Brackets, fixtures, internal structural components, functional prototypes

By optimizing the cutting tools, cutting parameters, and feed patterns, we can reduce visible tool marks on the part’s surface. This process will give your parts a smoother machined surface.

• Suitable Materials: Most metals and engineering plastics
• Surface Roughness Reference: Ra 1.6–0.8 μm
• Key Features: Preserves the material’s natural color; dimensions are easy to control
• Typical Applications: Precision housings, mating surfaces, sliding surfaces, and visible mechanical parts

We use grinding wheels to perform precision machining on the surfaces of parts, reducing surface roughness while improving dimensional accuracy, flatness, roundness, and cylindricity.

• Suitable Materials: Carbon steel, alloy steel, stainless steel, tool steel
• Surface Roughness Reference: Ra 0.8–0.2 μm
• Key Features: High dimensional accuracy; suitable for hardened materials
• Typical Applications: Shafts, bearing seats, guideways, sealing surfaces, precision reference surfaces

We remove surface microscopic protrusions and fine machining marks by progressively using abrasive materials of different grits, enabling parts to achieve smooth, bright, or mirror-like finishes.

• Suitable Materials: Stainless steel, aluminum, copper, brass, titanium
• Surface Roughness Reference: Ra 0.8–0.1 μm, depending on your material and part structure
• Key Features: Improve appearance; reduce roughness;easy to clean
• Typical Applications: Medical devices, food processing equipment

We create continuous and directional linear textures on metal surfaces through sanding belts, grinding wheels, or abrasive pads. The part surface will present a matte or semi-matte metallic texture.

• Suitable Materials: Stainless steel, aluminum, copper, brass
• Surface Roughness Reference: Based on the grit grade, direction, and sample piece
• Key Features: Clear texture; minimizes minor scratches and surface irregularities
• Typical Applications: Equipment panels, control panels, housings, covers, decorative parts

When using multiple parts in combination, you should specify a uniform brushing direction on the drawings.

We use compressed air to propel abrasive particles at high speed onto the surface of the parts, removing oxide layers, minor tool marks, and surface contaminants while creating a uniform rough texture.

• Suitable Materials: Steel, stainless steel, aluminum, castings
• SurfaceRoughness Reference: It is recommended to determine through sandblasting grade or standard sample parts
• Key Features: Fine texture, uniform appearance, minimal impact on dimensions
• Typical Applications: Consumer electronics housings, instrument parts, aluminum alloy panels

We use fine glass beads to gently impact the surface of the parts, creating a uniform, non-directional matte or satin finish.

• Suitable Materials: Aluminum, steel, stainless steel, copper, brass
• SurfaceRoughness Reference: This depends on the abrasive, processing time and initial surface
• Key Features: Suitable for small parts in mass production; high deburring efficiency
• Typical Applications: Fasteners, fittings, turned parts, small hardware components

We can form an oxide film on the surface of aluminum alloy through electrochemical methods to improve the corrosion resistance and surface durability of parts.

• Suitable Materials: Aluminum and aluminum alloys
• Surface Effect: Natural, black, colored, matte, or glossy
• Key Features: Corrosion resistance, color retention, and consistent appearance
• Typical Applications: Electronic enclosures, camera parts, control panels, and robot parts

Hard anodizing can form a thicker and harder oxide layer than ordinary anodizing, which can greatly improve the wear resistance and service life of parts.

• Suitable Materials: Aluminum and aluminum alloys
• Surface Effect: Usually dark gray, grayish brown or black
• Key Features: High hardness, good wear resistance, and certain insulation properties
• Typical Applications: Pistons, sliding components, pneumatic parts, and parts for automation equipment

A thin conversion coating is formed on the surface of aluminum alloy parts through a chemical reaction. The coating can not only provide basic corrosion protection for the components but also ensure the conductivity of the parts.

• Suitable Materials: Aluminum and aluminum alloys
• Surface Effect: Transparent, pale yellow, or with a slight iridescent sheen
• Key Features: Thin coating, minimal dimensional impact
• Typical Applications: Electrical enclosures, communication equipment, aerospace structural components

We use an acidic solution to remove free iron, machining residues, and contaminants from the surface of stainless steel, thereby helping the parts form a more stable passivation layer.

• SuitableMaterials: Austenitic, martensitic and some precipitation hardening stainless steels
• Surface Effect: Usually does not significantly change the original appearance
• Keyfeatures: Improves corrosion resistance, high surface cleanliness
• Typical Applications: Medical instruments, food machinery, laboratory equipment

This process uses electrochemical methods to preferentially remove microscopic surface protrusions, resulting in a smoother, cleaner and brighter metal surface.

• Suitable Materials: Primarily used on stainless steel, but can also be used on certain other metals
• Surface Effect: Smooth, bright, and clean
• Key Features: Reduces micro-roughness and improves cleanliness and corrosion resistance
• Typical Applications: Medical, pharmaceutical, food, and semiconductor components

A black oxide film is formed on the surface of steel parts through a chemical reaction. Parts treated with this process will achieve a low-reflective industrial appearance and basic rust protection.

• Suitable Materials: Carbon steel, alloy steel, tool steel
• Surface Effect: Black, low gloss
• Key Features: Thin coating, minimal impact on dimensions
• Typical Applications: Gears, jigs, fasteners, mechanical structural components

We use a chemical reduction reaction to deposit a uniform layer of nickel alloy onto the surface of the parts.

• Suitable Materials: Steel, stainless steel, aluminum, copper, and copper alloys
• Surface Effect: Silver-gray, semi-bright
• Key Features: Uniform plating, corrosion resistance, wear resistance
• Typical Applications: Valve bodies, molds, precision mechanisms

We deposit a layer of nickel onto the surface of metal parts through electrolysis. This process enhances the parts’ corrosion resistance and wear resistance, and improves their aesthetic appearance.

• Suitable Materials: Steel, copper, brass, and aluminum
• Surface Effect: Silver-white, glossy, or semi-glossy
• Key Features: Attractive appearance
• Typical Applications: Decorative parts, hardware, mechanical components, and electrical parts

This process will form a zinc layer on the surface of steel parts.

• Suitable Materials: Carbon steel, low-alloy steel
• Surface Effect: White zinc, blue-white zinc, colored zinc, black zinc
• Key Features: Cost-effective, good anti-corrosion performance
• Typical Applications: Fasteners, brackets, automotive parts, mechanical hardware

A layer of chromium is deposited onto the surface of the part. Through this process, the part achieves a bright, decorative finish, as well as excellent surface hardness and wear resistance.

• Suitable Materials: Steel, copper alloys
• Surface Effect: Bright silver or mirror finish
• Key Features: High hardness, wear resistance, and excellent decorative properties
• Typical Applications: Hydraulic rods, shaft components, molds

This process involves uniformly adsorbing charged powder onto the part surface, then forming a continuous coating through heating and curing.

• Suitable Materials: Aluminum, carbon steel, stainless steel
• Surface Effect: Multiple colors, glosses and textures available
• Key Features: Impactresistant, scratch resistant, suitable for outdoor use
• Typical Applications: Equipment enclosures, frames, panels, brackets

By spraying liquid paint, a protective or decorative coating is formed on the surface of the part.

• Suitable Materials: Metals and someplastics
• Surface Effect: Matte, semi-matte, high-gloss, metallic, etc.
• Key Features: Flexible color options
• Typical Applications: Equipment enclosures, prototypes, instrument panels

We remove machining marks from plastic parts through mechanical grinding or specialized polishing processes, thereby enhancing the surface transparency and gloss of the plastic parts.

• Suitable Materials: Acrylic, polycarbonate, and sometransparent engineering plastics
• Surface Effect: Transparent, glossy
• Key Features: Improve optical appearance and reduce visible tool marks
• Typical Applications: Transparent windows, lampshades, display parts