- Ellyn@tenghui-proto.com
- +86-18666887162
Get custom high-precision metal and plastic components directly from our in-house CNC manufacturing facility, covering rapid prototyping to full-scale mass production with zero middleman markup.
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TENGHUI provides custom CNC machining services for metal and plastic parts, from rapid prototyping and low-volume runs to full-scale production. With 50+ CNC machines and comprehensive capabilities in CNC milling, turning, EDM, drilling, and precision grinding, we produce both simple and complex parts according to your drawings and specifications. Based in China, we serve customers worldwide with consistent quality, reliable lead times, and dependable delivery.
Common Grades: 6061, 6063, 7075, 2024, 5052, 5083, and 6082
Key Properties: Lightweight, machinable, corrosion-resistant, and available in high-strength and anodizing-friendly grades.
Typical Applications: Housings, brackets, frames, heat sinks, electronic enclosures, fixtures, aerospace parts, and functional prototypes.
Available Finishes: Anodizing, hard anodizing, conversion coating, powder coating, bead blasting, polishing, and laser marking.
Common Grades: C101, C110, C14500, and C17200
Key Properties: Excellent electrical and thermal conductivity, corrosion resistance, and ductility, with selected grades offering improved machinability and strength.
Typical Applications: Heat sinks, busbars, grounding terminals, connectors, electrodes, battery contacts, and power distribution components.
Available Finishes: Polishing, nickel plating, tin plating, silver plating, and protective coating.
Common Grades: C360 / Free-Cutting Brass
Key Features: Outstanding machinability, low friction coefficient, non-sparking, and great electrical conductivity.
Typical Applications: Threaded pipe fittings, fluid valve bodies, compression couplings, and electronic terminal connectors.
Common Grades:303, 304, 316/316L, 17-4 PH, and 420
Key Properties:Excellent corrosion resistance, high strength, durability, and good temperature resistance. Selected grades offer improved machinability, enhanced chemical resistance, or heat-treatable mechanical properties.
Typical Applications: Food-processing equipment components, marine hardware, valve and pump parts, shafts, fittings, fasteners, automation components, and precision instrument parts.
Available Finishes: As-machined, passivation, electropolishing, bead blasting, brushing, polishing, black oxide, and PVD coating.
Common Grades: 1018, 1020, A36, 1045, 4140, and 42CrMo4
Key Properties: Cost-effective, strong, and durable, with selected grades offering good machinability, weldability, toughness, wear resistance, and heat-treatment response.
Typical Applications: Shafts, gears, sprockets, axles, brackets, base plates, fixtures, machine frames, tooling, and structural components.
Available Finishes: Black oxide, zinc plating, nickel plating, phosphate coating, powder coating, painting, case hardening, and heat treatment.
Common Grades: P20, D2, H13, and S7; other grades available upon request
Key Properties: High hardness, wear resistance, toughness, and dimensional stability, with selected grades offering excellent heat and impact resistance.
Typical Applications: Molds, dies, punches, mold inserts, forming tools, wear plates, cutting tools, and precision fixtures.
Available Finishes: Heat treatment, nitriding, polishing, precision grinding, black oxide, and PVD coating.
Common Grades: Grade 2 and Grade 5 (Ti-6Al-4V)
Key Properties: Lightweight, strong, corrosion-resistant, and durable, with selected grades offering excellent chemical resistance and fatigue performance.
Typical Applications: Robotic components, marine hardware, chemical-processing equipment, automotive parts, fasteners, shafts, and precision structural components.
Available Finishes: Polishing, bead blasting, brushing, anodizing, passivation, and PVD coating.
Key Properties: Lightweight, impact-resistant, easy to machine, and cost-effective, with good dimensional stability and electrical insulation.
Typical Applications: Electronic enclosures, equipment housings, control panels, functional prototypes, consumer products, automotive interior components, fixtures, and general-purpose mechanical parts.
Common Colors: Natural, black, and custom colors subject to material availability.
Available Finishes: As-machined, sanding, mechanical polishing, painting, and laser marking upon request.
Key Properties: High stiffness, low friction, excellent wear resistance, good dimensional stability, and low moisture absorption, making it suitable for precision mechanical parts.
Typical Applications: Gears, bushings, rollers, bearing components, valve parts, guides, spacers, fixtures, and other precision components.
Common Colors: Natural white, black, and custom colors subject to material availability.
Available Finishes: As-machined, deburring, fine-sanding, and laser marking upon request.
Key Properties: Strong, tough, lightweight, and wear-resistant, with good fatigue resistance and low friction. Moisture absorption and dimensional changes vary by grade.
Typical Applications: Gears, pulleys, bushings, rollers, bearing components, guides, spacers, wear pads, and industrial equipment parts.
Common Colors: Natural, black, and custom colors subject to material availability.
Available Finishes: As-machined, deburring, fine sanding, dyeing, and laser marking upon request.
Key Properties: High mechanical strength, excellent chemical and wear resistance, good dimensional stability, and reliable performance at elevated temperatures.
Typical Applications: Semiconductor equipment components, electrical insulators, seals, valve parts, pump components, chemical-processing equipment, fixtures, and other high-performance precision parts.
Common Colors: Natural beige, black, and selected reinforced grades subject to material availability.
Available Finishes: As-machined, precision polishing, bead blasting, and laser marking upon request.
Key Properties: Lightweight, chemically resistant, moisture-resistant, and electrically insulating, with good fatigue resistance and low density.
Typical Applications: Chemical-processing components, manifolds, pump and valve parts, laboratory equipment, fluid-handling components, covers, tanks, and industrial fixtures.
Common Colors: Natural white, black, grey, and custom colors subject to material availability.
Available Finishes: As-machined, deburring, surface texturing, and laser marking upon request.
Key Properties: Lightweight, impact-resistant, chemically resistant, and moisture-resistant, with low friction and good durability in demanding environments.
Typical Applications: Wear strips, guides, rollers, spacers, liners, conveyor components, chemical-handling parts, equipment guards, and general industrial components.
Common Colors: Natural white, black, blue, green, and custom colors subject to material availability.
Available Finishes: As-machined, deburring, surface texturing, and engraving upon request.
Key Properties: High impact resistance, good dimensional stability, electrical insulation, and excellent transparency in optical-grade materials.
Typical Applications: Protective covers, machine guards, transparent housings, inspection windows, light covers, electronic components, fixtures, and functional prototypes.
Common Colors: Clear, translucent, black, and custom colors subject to material availability.
Available Finishes: As-machined, sanding, mechanical polishing, painting, laser marking, and vapor polishing upon request.
Key Properties: Excellent optical clarity, good UV and weather resistance, low weight, and a smooth surface that can be polished to a high-gloss finish.
Typical Applications: Display panels, transparent covers, equipment windows, light guides, optical components, signage, decorative parts, and visual prototypes.
Common Colors: Clear, translucent, opaque, and custom colors subject to material availability.
Available Finishes: As-machined, sanding, mechanical polishing, flame polishing, painting, and laser engraving.
Improve the performance, durability, corrosion resistance, and appearance of your custom CNC-machined parts with our comprehensive surface finishing options. We offer anodizing, plating, powder coating, polishing, bead blasting, laser marking, and other treatments tailored to your material, application, and engineering specifications.
| Surface Finish | Appearance / Color | Key Properties & Benefits | Compatible Materials |
|---|---|---|---|
| As-Machined | Natural finish with visible tool marks | The most economical option with no additional finishing. Typical surface roughness is approximately Ra 1.6–3.2 μm, depending on the material, geometry, and machining process. | Aluminum, steel, stainless steel, copper, brass, titanium, and plastics |
| Anodizing (Type II) | Clear, black, blue, red, gold, grey, and other colors | Creates a protective oxide layer that improves corrosion resistance, wear resistance, and appearance. Color and finish may vary by alloy and surface condition. | Aluminum |
| Hardcoat Anodizing (Type III) | Natural grey, dark grey, black, and selected colors | Produces a thicker and harder oxide layer for improved surface hardness, abrasion resistance, electrical insulation, and durability. Coating thickness depends on the specification and application. | Aluminum |
| DLC Coating | Dark grey to black | Provides high surface hardness, low friction, and improved wear resistance while adding minimal coating thickness. | Tool steel, stainless steel, titanium, carbide, and selected alloys |
| Titanium Nitride (TiN) | Metallic gold | A PVD coating that improves surface hardness, wear resistance, and lubricity, helping extend the service life of tools and mechanical components. | Tool steel, stainless steel, carbide, titanium, and selected alloys |
| Metal Plating | Nickel, chrome, zinc, tin, silver, gold, and other metallic finishes | Improves corrosion resistance, wear resistance, conductivity, solderability, or appearance, depending on the plating material and process. | Steel, stainless steel, copper, brass, and properly pretreated aluminum |
| Chemical Conversion Coating | Clear or yellow/gold iridescent | Provides corrosion protection while helping retain surface conductivity. It can also serve as a suitable base for painting or powder coating. | Aluminum |
| PTFE-Based Coating | Black, grey, green, or other formulation-dependent colors | Provides low friction, non-stick performance, chemical resistance, and improved wear characteristics. Performance depends on the coating system and operating conditions. | Aluminum, steel, stainless steel, and selected alloys |
| Case Hardening | Minimal change or heat-treatment discoloration | Hardens the surface while retaining a tougher core, improving wear resistance and fatigue performance. Available processes depend on the steel grade and part requirements. | Selected carbon steels, alloy steels, and tool steels |
| Heat Treatment | Appearance varies by process | Modifies mechanical properties such as hardness, strength, toughness, and dimensional stability. Results depend on the material and specified heat-treatment cycle. | Carbon steel, alloy steel, tool steel, stainless steel, and selected aluminum alloys |
| Passivation | Minimal change to the original appearance | Removes free iron and surface contaminants, helping restore or improve the corrosion resistance of stainless steel. | Stainless steel |
| Powder Coating | Matte, satin, gloss, textured, and custom colors | Provides a durable decorative and protective coating with good resistance to corrosion, abrasion, scratching, and chipping. | Aluminum, steel, stainless steel, and other suitable heat-resistant metals |
| Industrial Painting | Matte, satin, gloss, and custom colors | Provides decorative color and additional environmental or corrosion protection. Performance depends on surface preparation, primer, paint system, and operating conditions. | Metals and selected plastics |
| Bead Blasting | Uniform matte or satin texture | Removes minor machining marks and creates a consistent, non-reflective surface. It is commonly used before anodizing or other finishing processes. | Aluminum, stainless steel, titanium, brass, and selected plastics |
| Polishing | Smooth, bright, or mirror-like finish | Reduces surface roughness and improves appearance, cleanability, and, in some applications, corrosion resistance. | Aluminum, stainless steel, brass, copper, titanium, and selected plastics |
| Brushing | Directional satin finish | Creates a uniform linear texture that improves appearance and helps conceal minor surface marks. | Aluminum, stainless steel, brass, and copper |
| Black Oxide | Matte or satin black | Produces a thin conversion layer that improves appearance and provides mild corrosion resistance when combined with oil or sealant. | Carbon steel, alloy steel, tool steel, and selected stainless steels |
| Zinc Plating | Clear, blue, yellow, black, or olive drab | Provides economical sacrificial corrosion protection for steel components. Additional chromate conversion coatings can improve corrosion resistance. | Carbon steel and alloy steel |
| Electropolishing | Smooth, bright, and clean metallic finish | Removes a controlled amount of surface material to improve smoothness, cleanability, corrosion resistance, and edge quality. | Stainless steel and selected conductive metals |
| Laser Marking | Permanent text, logos, serial numbers, or codes | Creates durable identification and traceability marks with minimal effect on part dimensions. Marking appearance depends on the material and finish. | Most metals and selected plastics |
CNC machining is a subtractive manufacturing process that uses computer-controlled tools to remove material from solid blocks, bars, plates, or tubes. It produces custom metal and plastic parts according to 3D CAD models and 2D technical drawings.
TENGHUI provides CNC milling, turning, 5-axis machining, EDM, drilling, and precision grinding. Our 50+ CNC machines support rapid prototypes, low-volume runs, and full-scale production.
We machine aluminum, stainless steel, carbon and alloy steel, tool steel, titanium, copper, brass, and engineering plastics such as ABS, POM, Nylon, PEEK, PP, HDPE, PC, and PMMA. Other materials are available upon request.
Please provide your 3D CAD files, 2D drawings, material specifications, quantities, surface finishes, tolerances, and inspection requirements. STEP or STP files and PDF drawings are preferred.
Yes. Our engineers review part geometry, tolerances, tool accessibility, material selection, surface finishes, and potential manufacturing risks. We may recommend practical changes to improve machinability, shorten lead times, or reduce costs.
Our standard machining tolerance is typically ±0.05 mm. Tolerances down to ±0.01 mm can be achieved for selected critical features, depending on the material, geometry, part size, and inspection requirements.
Costs can often be reduced by limiting tight tolerances to critical features, increasing internal corner radii, avoiding deep cavities, using standard holes and threads, selecting readily available materials, and simplifying non-functional features.
We support one-off prototypes, low-volume runs, and repeat production orders. For suitable parts, our 50+ CNC machines and optimized production processes can support monthly volumes exceeding 5,000 pieces.
Lead times depend on part complexity, quantity, material availability, tolerances, finishing, and inspection requirements. An estimated production schedule will be provided with each quotation after our engineering review.
Available finishes include anodizing, hardcoat anodizing, plating, passivation, powder coating, painting, bead blasting, polishing, brushing, heat treatment, and laser marking. Suitable finishes depend on the part material and application.
We perform incoming material verification, first-article inspection, in-process checks, and final inspection. Depending on the project, inspection may include gauges, micrometers, optical measuring equipment, height gauges, and CMMs.
Yes. Material certificates, dimensional inspection reports, CMM reports, and surface-treatment certificates can be provided upon request. Please specify all documentation requirements before ordering so they can be included in the quotation and production plan.
Once we receive your design files, our senior manufacturing engineers will manually perform a comprehensive DFM review and deliver an accurate, optimized quote within 24 hours.
