Innovative Companies We Support
We’re not only the fastest provider of CNC machining prototypes, but also the most reliable partner for on-demand part production.
Why does this matter?
From concept validation to full-scale production, you only need one trusted supplier to support every stage of your product development.
How do we make it possible?
Beyond prototyping, we offer complete production support. Our expert team, together with a trusted manufacturing partner network, delivers significant economies of scale and competitive advantages. On-demand production keeps costs under control while giving you the flexibility to build inventory as needed. Whether it’s small-batch runs or high-volume production of up to millions of end-use parts, we adapt to your requirements with speed and reliability.
Why Choose to Work with 6CProto?
With a network of over 50 trusted partners, we can seamlessly support everything from rapid prototyping and small-batch trials to full-scale mass production.
6CProto advantages of Precision Machining？
Precision Machining for Complex Parts
When it comes to machining complex parts, higher-level technical requirements often come into play. To ensure your parts meet your exact design intent, we request that you provide 2D engineering drawings or additional technical documentation. Our experienced engineers will review your designs and provide professional feedback to optimize manufacturability and performance.
Tight Tolerance Control – Compliant with ISO 2768-f, with feature tolerances as precise as ±0.002 in (0.0508 mm)
Certified Quality Systems – CoC, FAI, ISO 9001 certifications available
Fully Machined Features – No excess material left behind, ensuring exact geometries
Note: All CNC machined parts are manufactured to meet ISO 2768 standards. Metal parts follow ISO 2768-m (medium) or ISO 2768-f (fine) requirements; plastic parts follow ISO 2768-m (medium). Ultra-precision tolerances down to ±0.0004 in (0.010 mm) are possible but must be clearly specified in your 2D drawings.
How to Work With Us
How to Work With Us
Our ordering process
Types of Precision Machining That We Offer
Precision CNC Milling
We utilize high-precision multi-axis milling machines (including imported equipment from the US, Japan, and Germany along with top-tier Chinese brands) to ensure CNC-machined parts meet the following accuracy standards:
Standard Tolerance: ±0.05 mm
Critical Dimension Tolerance: ±0.005 mm
Industry Application Expertise
Our team possesses extensive expertise in manufacturing precision components for the world’s most demanding sectors, including aerospace and medical devices.
Precision CNC Turning
When absolute precision is non-negotiable, CNC turning is the solution you can trust. Equipped with professional-grade CNC lathes and backed by a team of seasoned engineers, we deliver flawless machining of rotating workpieces—perfect for high-accuracy circular and tubular components.
While CNC milling is often the go-to for small parts, CNC turning truly shines when producing larger components with an outer diameter exceeding 2.5 inches. From small-batch runs to intricate, high-complexity designs, we consistently achieve exceptional quality with uncompromising accuracy.
Choose us, and make every part a benchmark for precision and excellence.
Mirror EDM Service
Mirror EDM is a special machining technology that removes conductive material through pulse discharge, enabling the workpiece surface to achieve extremely high smoothness (Ra ≤ 0.1 μm). Its core feature is the ability to directly produce a mirror-like finish on complex profiles or high-hardness materials. It is commonly used in fields with extremely high requirements for surface quality and precision, such as precision molds, optical components, and aerospace parts.
Precision Grinding
6CProto is also equipped with high-precision grinding machines for metal parts and prototypes with stringent tolerance requirements. Grinding is a machining process that uses high-speed rotating abrasive tools to cut the surface of a workpiece, removing excess material to achieve high-accuracy dimensions, shapes, and surface quality. It is commonly used in fields such as aerospace components and precision instruments. 6CProto’s professional team will tailor the optimal grinding solution for your needs.
Quality Assurance
| Driven by excellence, we embed quality into every detail—from advanced tools to rigorous standards. We ensure consistent, outstanding quality. | |||||
|---|---|---|---|---|---|
| 1 | Advanced Inspection Equipment | ||||
| We employ professional inspection equipment for precise measurement and validation. A spectrometer analyzes metal composition, a 2.5D measuring instrument verifies detailed features, a coordinate measuring machine (CMM) inspects complex three-dimensional structures, and height gauges ensure the accuracy of fundamental dimensions. | |||||
| 2 | Strict quality management system | ||||
| From first article inspection to in-process checks and final pre-shipment testing, every stage is governed by a rigorous management system to ensure consistent quality. | |||||
| IQC（Incoming Quality Control） | FAI (First Article Inspection) | ||||
| IPQC（In-Process Quality Control） | CMM inspection report | ||||
| FQC（Final Quality Control） | DIR(Dimensional Inspection Report ) | ||||
| OQC（Outgoing Quality Control） | CAR（Corrective and Preventive Action Report） | ||||
| Material Certificates | ISO 9001 | ||||
CNC Machining Materials
Metal
Inconel
Inconel Superalloy Materials
Magnesium
Magnesium & Magnesium Alloy Materials
Titanium
Titanium
Titanium — Material overview
Titanium alloys are high-performance materials that combine exceptional strength, a superior strength-to-weight ratio, outstanding corrosion resistance, high-temperature stability, and excellent biocompatibility. While costlier and more difficult to process than steels or aluminum alloys, their unique advantages—high strength, light weight, and durability in extreme environments—make them indispensable in aerospace, advanced medical, and deep-sea applications, where performance takes priority over cost.
Low-Carbon Steel
Low-Carbon (Mild) Steel Material
Low Carbon Steel — Sheet metal
Mild steel is widely used in sheet metal processing due to its excellent plasticity and weldability, and it is not prone to cracking after processing. This material is susceptible to oxidation and rusting, so post-treatment (such as galvanizing, painting, and powder coating) is required to enhance surface protection.
Stainless Steel
Stainless Steel Material & Alloys
Stainless Steel 316 — Material overview
Stainless steel 316 sheet is an austenitic stainless steel containing molybdenum, which gives it superior corrosion resistance compared to 304, especially in chloride environments. The 316 stainless steel sheet not only offers excellent resistance to acids, alkalis, and pitting corrosion, but also has good toughness and weldability, making it resistant to cracking or deformation during processing. With a smooth and attractive surface that is easy to clean and maintain, it is ideal for use in chemical equipment, ships, medical devices, marine facilities, and high-end kitchen equipment where high corrosion resistance is required.
Stainless Steel 304 — Sheet metal
304 stainless steel is a commonly used austenitic stainless steel material, widely applied in various equipment and structural components due to its excellent corrosion resistance and workability. 304 stainless steel sheets have outstanding resistance to acids and alkalis, maintaining long-term stability in atmospheric conditions, water, and most chemical media. At the same time, they offer good toughness and strong weldability, making them resistant to cracking or deformation during forming and processing. With a smooth surface that is easy to clean and maintain, 304 stainless steel is widely used in kitchenware, medical equipment, and architectural decoration.
Copper
Copper Material
Copper is a metal that is corrosion-resistant, extremely electrically conductive, and highly ductile. Its glossy orange-red appearance is instantly recognizable, and the metal remains aesthetically appealing even during its natural oxidation process—where environmental reactions form a bluish-green coating known as patina. However, it should be noted that copper’s weldability is generally considered moderate to poor.
Copper — Material overview
The core advantage of copper materials lies in their exceptional electrical and thermal conductivity, combined with excellent corrosion resistance, malleability, and ductility. This allows copper to be easily fabricated into a wide range of complex shapes, making it highly valuable across multiple industries.
C101 (commonly known as oxygen-free electronic copper) contains virtually no oxygen impurities, offering top-tier purity and conductivity. It is the preferred material for applications with extremely high requirements for material purity and electrical efficiency. However, its cost is higher than C110, making it more suitable for scenarios where peak conductivity is critical and cost is not the primary concern, such as high-precision electronic components and key conductive parts.
C110, an oxygen-containing derivative of C101, contains only trace amounts of oxygen. While its purity, conductivity, and corrosion resistance are slightly lower than C101, it still meets the core requirements of most industrial applications. With lower cost and excellent formability, C110 is commonly used in heat exchangers, industrial wiring, and piping systems.
Brass
Brass Material & Brass Alloys
Explore 6CProto’s brass materials—offering excellent machinability, corrosion resistance, and attractive appearance. Ideal for hardware, plumbing, decorative, electrical, and industrial applications.
Brass is an alloy composed of copper and zinc, with a golden color and excellent weather and corrosion resistance. Its tensile strength is comparable to that of mild steel. In addition, brass has good machinability and is easy to work with, allowing for high feed rates and minimal reliance on coolant.
Brass — Material overview
Brass sheet metal, an alloy of copper and zinc, combines excellent corrosion resistance with good strength and durability. Its high malleability and formability make it easy to fabricate into complex shapes, while its superior thermal and electrical conductivity suit a variety of industrial and electrical applications. Additionally, its attractive golden appearance makes it a popular choice for decorative and architectural uses.
Plastic
PC+ABS
PC/ABS (Polycarbonate‑ABS Blend) Plastic Material
PC+ABS is a blend-modified material that combines the advantages of both materials. It not only inherits the high impact resistance of PC but also the material strength of ABS, while improving its heat resistance. It is often used in electronic product casings, automotive interiors, consumer products, and more.
CPVC
CPVC (Chlorinated Polyvinyl Chloride) Plastic Material
CPVC (Chlorinated Polyvinyl Chloride) is a modified form of PVC, with enhanced thermal stability, mechanical properties, and chemical resistance. These upgraded characteristics make CPVC an excellent choice for applications in high-temperature and corrosive environments where ordinary PVC would fail.CPVC — Material overview
CPVC (Chlorinated Polyvinyl Chloride) is a thermoplastic plastic obtained by chlorination modification of polyvinyl chloride (PVC). Such structural changes enable it to far outperform ordinary PVC in terms of heat resistance, mechanical properties, and chemical resistance, making it an ideal material for high-temperature and corrosive environments.
PC+GF
PC+GF(Glass‑Fiber Reinforced Polycarbonate) Material
PC+GF (polycarbonate + glass fiber reinforced composite material) is a reinforced engineering plastic made by adding glass fiber (abbreviated as GF) to a polycarbonate (PC) matrix. The addition of glass fiber can significantly improve the mechanical properties and stability of pure PC while retaining some of PC’s excellent inherent properties, making it suitable for scenarios with high requirements for strength, rigidity, and dimensional accuracy. It features high strength, high rigidity, and heat resistance, and is ideal for automotive parts, electrical enclosures, and structural components.
PEI
PEI (Polyetherimide) Engineering Material
PEI (polyetherimide) is a high-performance thermoplastic known for excellent heat resistance, mechanical strength, and chemical stability. It is widely used in demanding applications across aerospace, electronics, medical, and industrial fields.
PTFE
PTFE
Polytetrafluoroethylene (PTFE), commonly known as Teflon, is a high-performance fluoropolymer. It is frequently used in mechanical components requiring reduced friction and wear—such as bearings, gears, and piston rings—due to its non-stick properties, low friction characteristics, and self-lubricating capabilities. PTFE also exhibits excellent electrical insulation properties, making it highly suitable for applications like high-frequency cables, high-voltage insulators, and electronic components.
Additionally, PTFE maintains stable performance during long-term use across an extreme temperature range from -200°C (ultra-low temperature) to 260°C (high temperature), enabling its use in harsh environments such as aerospace systems, deep-sea equipment, and high-temperature industrial apparatus.
LDPE
LDPE
Low-Density Polyethylene (LDPE) is lighter than water, soft and tough, with excellent acid and alkali resistance as well as electrical insulation properties. It is widely used in fields such as packaging, agriculture, electronics, and daily necessities.
PP
PP (Polypropylene) Engineering Material
Polypropylene (PP) is a well-balanced thermoplastic characterized by lightweight material, excellent chemical resistance, and good flexibility. Owing to these properties, it finds wide application in fields such as packaging, household appliances, automotive, daily necessities, and medical devices.
PET
PET
PET (polyethylene terephthalate) is a common thermoplastic polyester with excellent mechanical properties and strong chemical resistance. It also offers glass-like transparency and luster, with a high light transmittance of about 88–92%, and is widely used in beverage bottles, food packaging, and engineering plastics.PET — CNC machining
PET (polyethylene terephthalate) is a common thermoplastic polyester with excellent mechanical properties and strong chemical resistance. It also offers glass-like transparency and luster, with a high light transmittance of about 88–92%, and is widely used in beverage bottles, food packaging, and engineering plastics.
PVC
PVC (Polyvinyl Chloride) Plastic Material
Polyvinyl chloride (PVC) is a widely used thermoplastic polymer material characterized by excellent mechanical properties, outstanding corrosion resistance, and superior electrical insulation performance. By incorporating various additives, it can be tailored to meet customized requirements. Owing to its unique combination of properties, PVC finds extensive applications in fields such as construction, industry, packaging, and healthcare.PVC — CNC machining
Polyvinyl chloride (PVC) is a widely used thermoplastic polymer material characterized by excellent mechanical properties, outstanding corrosion resistance, and superior electrical insulation performance. By incorporating various additives, it can be tailored to meet customized requirements. Owing to its unique combination of properties, PVC finds extensive applications in fields such as construction, industry, packaging, and healthcare.
PVC — Injection molding
Polyvinyl chloride (PVC) is a widely used thermoplastic polymer material characterized by excellent mechanical properties, outstanding corrosion resistance, and superior electrical insulation performance. By incorporating various additives, it can be tailored to meet customized requirements. Owing to its unique combination of properties, PVC finds extensive applications in fields such as construction, industry, packaging, and healthcare.
PC
PC (Polycarbonate) Engineering Material
PC (polycarbonate) is a versatile engineering plastic known for its high impact resistance, optical transparency, and good thermal stability. It combines toughness, heat resistance, and aesthetic clarity, making it suitable for a wide array of applications.PC — CNC machining
PC (polycarbonate, commonly known as bulletproof glue) is inherently pale yellow or colorless and transparent, featuring hardness, toughness and luster. It boasts prominent advantages: with a light transmittance of 90%, it not only has good mechanical strength but also excellent impact resistance, along with outstanding heat resistance and weatherability.
PC — Injection molding
PC (polycarbonate, commonly known as bulletproof glue) is inherently pale yellow or colorless and transparent, featuring hardness, toughness and luster. It boasts prominent advantages: with a light transmittance of 90%, it not only has good mechanical strength but also excellent impact resistance, along with outstanding heat resistance and weatherability.
PMMA (Acrylic)
PMMA (Acrylic) Engineering Material
Acrylic (also known as polymethyl methacrylate, PMMA) boasts not only excellent optical performance but also outstanding UV resistance. With a light transmittance of up to 92%—comparable to glass—it has become a popular material in scenarios ranging from neon signs in shopping malls and display case panels in museums to precision optical lenses and stage light covers.PMMA (Acrylic) — CNC machining
Acrylic (also known as polymethyl methacrylate, PMMA) boasts not only excellent optical performance but also outstanding UV resistance. With a light transmittance of up to 92%—comparable to glass—it has become a popular material in scenarios ranging from neon signs in shopping malls and display case panels in museums to precision optical lenses and stage light covers.
PEEK
PEEK (Polyetheretherketone) Engineering Material
PEEK (polyetheretherketone) is a premium thermoplastic widely recognized for its exceptional thermal stability, mechanical strength, chemical resistance, dimensional stability, and in many cases biocompatibility and electrical insulation. It is used in extreme environments like aerospace, medical implants, electronics, and semiconductor industries.PEEK — CNC machining
PEEK (Polyetheretherketone) is a top-performing thermoplastic engineering plastic, featuring excellent high-temperature resistance, robust mechanical properties, versatile corrosion resistance, top-tier biocompatibility, exceptional dimensional stability, and outstanding electrical insulation and radiation resistance. It is widely used in high-end fields such as aerospace, high-end medical care, and electronic semiconductors.
PEEK — 3D printing
PEEK (Polyether Ether Ketone) is a high-performance engineering plastic widely used in aerospace, automotive, medical, and electronics industries. As a material that is resistant to high temperatures, chemical corrosion, and wear, PEEK offers exceptional strength and rigidity in 3D printing, making it suitable for demanding functional parts. It can withstand temperatures exceeding 250°C and maintain stable performance under high loads and extreme conditions. PEEK also has excellent electrical insulation properties and biocompatibility, making it an ideal choice for medical implants and high-end industrial components.
PEEK — Injection molding
PEEK (Polyetheretherketone) is a top-performing thermoplastic engineering plastic, featuring excellent high-temperature resistance, robust mechanical properties, versatile corrosion resistance, top-tier biocompatibility, exceptional dimensional stability, and outstanding electrical insulation and radiation resistance. It is widely used in high-end fields such as aerospace, high-end medical care, and electronic semiconductors.
Nylon
Nylon (Polyamide) Engineering Material
Nylon (polyamide) is a versatile engineering thermoplastic known for its high strength, excellent wear resistance, good chemical stability, and toughness. It is widely used across industries for gears, bearings, bushings, automotive components, industrial parts, and more. Its ease of machining, coupled with its chemical resistance, also makes it suitable for applications in the automotive, aerospace, and medical industries. With its remarkable combination of properties, nylon stands out as a versatile and reliable material for a diverse range of CNC machining applications.Nylon — CNC machining
Nylon is a versatile and widely used material in CNC machining due to its exceptional properties. Its high tensile strength, low coefficient of friction, and resistance to wear and abrasion make it an excellent choice for applications requiring durability and reliability, such as gears, bushings, and bearings. Additionally, nylon’s low moisture absorption and good dimensional stability ensure consistent performance even in humid or varying temperature conditions.
Its ease of machining, coupled with its chemical resistance, also makes it suitable for applications in the automotive, aerospace, and medical industries. With its remarkable combination of properties, nylon stands out as a versatile and reliable material for a diverse range of CNC machining applications.
PA (Nylon) — Material overview
Nylon is a versatile and widely used material in CNC machining due to its exceptional properties. Its high tensile strength, low coefficient of friction, and resistance to wear and abrasion make it an excellent choice for applications requiring durability and reliability, such as gears, bushings, and bearings. Additionally, nylon’s low moisture absorption and good dimensional stability ensure consistent performance even in humid or varying temperature conditions.
Its ease of machining, coupled with its chemical resistance, also makes it suitable for applications in the automotive, aerospace, and medical industries. With its remarkable combination of properties, nylon stands out as a versatile and reliable material for a diverse range of CNC machining applications.
POM
POM (Polyoxymethylene / Acetal) Engineering Material
POM (polyoxymethylene), also known as acetal, is a high‑performance engineering thermoplastic valued for its rigidity, low friction, excellent wear resistance, and good dimensional stability. It is often used in precision mechanical parts that require durable, low‑maintenance performance.
HIPS
HIPS (High Impact Polystyrene) Material
HIPS, or High Impact Polystyrene, is a modified polystyrene polymer enhanced with rubber modifiers (usually polybutadiene) to improve toughness and durability. The result is a rigid yet impact-resistant thermoplastic that retains good processability, making it popular in prototyping, manufacturing, and consumer products.
HIPS combines the stiffness of polystyrene with improved impact performance, offering a cost-effective balance of mechanical and processing properties.
HDPE
HDPE (High-Density Polyethylene) Material
High-Density Polyethylene (HDPE) is a thermoplastic polymer with high strength-to-density ratio, known for durability, chemical resistance, and ease of processing. As a semi-crystalline plastic, it offers excellent impact performance, low moisture uptake, and good machinability — making it a popular choice in industrial, chemical, packaging, and structural applications. It is great for applications such as orthotic and prosthetic devices, water storage, and tanks.
Surface Finish and Post-Processing Options
As machined
As the standard finish for CNC-machined parts, the as-machined surface is carefully deburred and chamfered to remove residual burrs and chips, providing a clean and uniform appearance with a typical roughness of Ra 3.2 μm.
Bead Blasted
To enhance the appearance of CNC-machined parts, bead blasting creates a smooth, uniform matte finish while removing visible machining marks, resulting in a refined and professional look. Suitable for various metal and plastic materials.
Anodizing
Anodizing is an ideal finishing option for aluminum parts. It creates a hard, durable protective layer that improves wear and corrosion resistance while offering multiple color choices to suit different applications.
Alodine
Alodine provides reliable corrosion protection and a distinctive greenish-gold finish for aluminum parts. With fast processing times and low cost, it is a popular finishing choice in aerospace, electronics, and industrial applications.
Polishing
Polishing is an ideal finishing process for improving the appearance and surface quality of parts. It creates a bright, smooth finish that enhances visual appeal while preserving dimensional precision.
Brushing
Brushing is an ideal finishing option for enhancing the appearance of metal parts. It creates elegant directional textures and a premium satin finish, giving products a modern industrial look. However, it is not recommended for high-humidity or corrosive environments.
Sanding
Sanding is an excellent option for improving the appearance of parts, creating a bright, high-gloss finish with a naturally uniform texture. Due to process limitations, sharp edges and intricate internal features may be difficult to finish completely.
Black-Oxide
Black Oxide is a cost-effective finishing process that provides a deep black appearance and low-glare surface while offering reliable rust protection for industrial and mechanical components.
Electroplating
Electroplating is a widely used finishing process that provides a durable metallic coating, improving corrosion and abrasion resistance while extending the lifespan of components.
Electroless Nickel Plating
Electroless Nickel Plating is a high-performance finishing process that delivers a bright, uniform metallic appearance while enhancing hardness, wear resistance, and corrosion resistance for demanding applications.
Chrome Plating
Chrome Plating is a finishing process that combines aesthetics with performance, delivering a mirror-like appearance while improving corrosion resistance, wear resistance, and overall durability.
Passivation
Passivation is an effective finishing process that enhances the protective properties of steel parts, improves corrosion resistance, and helps extend product lifespan across a wide range of industrial applications.