abc
TUOWEI Precision offers advanced CNC machining solutions for high-precision metal and plastic components, designed to meet the most demanding manufacturing needs.
Tuowei Precision delivers advanced custom CNC machining services to engineers, product developers, and designers through our trusted network of certified manufacturing partners. Whether your design is simple or highly complex, our precision machine shops can handle everything from rapid prototypes and small-batch machining to high-volume production runs.
With our streamlined online process, you can easily upload your CAD file and receive an instant quote with pricing, lead times, and design-for-manufacturability insights. We maintain strict quality standards with ISO 9001:2015, ISO 13485, IATF 16949:2016, and AS9100D certifications, along with ITAR registration. For added assurance, we also offer inspection options, hardware traceability, material certifications, and Certificates of Conformance (CoCs).
CNC machining (Computer Numerical Control machining) is a highly precise and automated manufacturing process that uses computer-controlled cutting tools to shape designs from metal or plastic stock. Depending on the complexity of the project, CNC machines can range from 3-axis and 4-axis milling machines to advanced 5-axis systems, lathes, and routers.
The way a part is machined can vary, sometimes the tool moves while the workpiece stays fixed, sometimes the workpiece rotates while the tool remains in place, and in many cases, both tool and workpiece move together to achieve complex geometries.
Using CAD (computer-aided design) models, skilled machinists program the machine to follow exact tool paths, ensuring that each part is cut with exceptional precision and repeatability.
TOUWEI is your trusted partner for high-quality prototypes and end-use machined parts, from simple to highly complex designs. With 700+ advanced CNC machines, we provide milling, turning, routing, EDM machining, drilling, and precision grinding. Our ISO 9001 certification and skilled expertise ensure accuracy and consistency in every project.
With over 200 dedicated milling centers, including 3-axis, 4-axis, and advanced 5-axis CNC mills, TOUWEI delivers tight-tolerance components and intricate geometries in both plastics and metals. We serve multiple industries while also specializing in precision mold making.
Our CNC lathes, turning centers, and mill-turn machines enable us to produce precise cylindrical parts, along with components from square or hexagonal raw materials. TOUWEI provides both prototype and production parts with rapid lead times, often delivered within just a few days.
Our CNC machines operate with precision tolerances that meet industry standards, ensuring that every part is consistently accurate and fits perfectly with other components.
| Feature Type | Typical Tolerance |
|---|---|
| General Dimensional Tolerance | ±0.025 mm (±0.001") |
| High Precision Tolerance | ±0.005 mm (±0.0002") |
| Hole Diameter (Drilled) | ±0.05 mm (±0.002") |
| Hole Diameter (Reamed/Bored) | ±0.01 mm (±0.0004") |
| Shaft Diameter (Turned) | ±0.01 mm (±0.0004") |
| Flatness | 0.02 mm per 100 mm |
| Parallelism | ±0.02 mm |
| Perpendicularity | ±0.02 mm |
| Surface Roughness (Ra) | 1.6–3.2 µm (63–125 µin) |
| Positional Tolerance | ±0.01 mm to ±0.02 mm |
| Thread Tolerance (Cut) | 6H / 6g (ISO) or Class 2A/2B (ANSI) |
| Minimum Feature Size | 0.5 mm (0.020") |
| Repeatability | ±0.005 mm (±0.0002") |
Get the most out of your CNC machining projects with TUOWEI’s precision-driven design guidelines. Our engineering team reviews your custom part designs and offers expert advice to ensure optimal performance, cost-efficiency, and manufacturability.
| Feature | Specification / Guideline |
|---|---|
| Radii | Sharp inside corners become natural radii due to tool shape. Drilling depth ≤ 12× tool diameter, End milling depth ≤ 10× cutter diameter |
| Threads & Tapped Holes | Φ 1.5–5 mm: depth = 3× diameter; Φ ≥ 5 mm: depth = 4–6× diameter; custom thread sizes available on request |
| Undercuts | Supported types: Square profile, Full radius profile, Dovetail profile |
| Text – CNC Milling | Minimum line width: 0.5 mm; minimum depth: 0.1 mm |
| Text – CNC Turning | Laser marking available for precision text |
| Engraving Options | CNC engraving and laser engraving available as per customer requirement |
| Aluminium Alloy | Description | Finishing Options | Applications |
|---|---|---|---|
| 6061 | Versatile and commonly used for structural applications. | Anodizing, Powder Coating, Polishing | Construction, Aerospace, Automotive |
| 7075 | High strength, ideal for aerospace and military applications. | Anodizing, Powder Coating, Polishing | Aerospace, Military, High-Strength Components |
| 2024 | Known for its high strength and excellent fatigue resistance. | Anodizing, Cladding, Painting | Aerospace, Military, Structural Components |
| 5052 | Good corrosion resistance and formability, used in marine and automotive applications. | Anodizing, Painting, Polishing | Marine, Automotive, Sheet Metal Work |
| 5083 | Exceptional performance in extreme environments, particularly marine applications. | Anodizing, Painting, Polishing | Marine, Chemical, Industrial |
| 6082 | Excellent extrudability, used for architectural and engineering applications. | Anodizing, Powder Coating, Polishing | Architecture, Engineering, Window Frames |
| 7050 | High strength and stress corrosion resistance, often used in aerospace. | Anodizing, Cladding, Painting | Aerospace, High-Stress Components |
| 1100 | Commercially pure aluminum, excellent corrosion resistance and workability. | Anodizing, Painting, Polishing | Chemical Equipment, Food Processing, Heat Exchangers |
| Brass Alloy | Description | Finishing Options | Applications |
|---|---|---|---|
| C260 | Cartridge brass, excellent for cold working. | Plating, Polishing, Lacquering | Ammunition, Heat Exchangers, Plumbing |
| C360 | Free machining brass, used for precision parts. | Plating, Polishing, Lacquering | Precision Machined Parts, Fasteners, Plumbing |
| C353 | High leaded brass, high strength, used in plumbing. | Plating, Polishing, Lacquering | Plumbing, Fasteners, Valve Components |
| C385 | Architectural bronze, applications for its decorative appeal. | Plating, Polishing, Lacquering | Architectural Trim, Ornamental Hardware, Plumbing |
| C272 | Yellow brass, excellent corrosion resistance, used in electrical components. | Plating, Polishing, Lacquering | Electrical Components, Fasteners, Plumbing |
| Copper Alloy | Description | Finishing Options | Applications |
|---|---|---|---|
| C101 | Oxygen-free, high conductivity, used in electrical applications. | Plating, Polishing, Lacquering | Electrical Conductors, Switches, Terminals |
| C110 | Electrolytic tough pitch, highly conductive, used in electrical and plumbing. | Plating, Polishing, Lacquering | Electrical Wiring, Plumbing, Busbars |
| C122 | Phosphorus-deoxidized, used in heat exchangers and radiators. | Plating, Polishing, Lacquering | Heat Exchangers, Radiators, Plumbing |
| C172 | Beryllium copper, high strength, used in aerospace and oil drilling. | Plating, Polishing, Lacquering | Aerospace, Oil Drilling, Springs |
| C194 | High conductivity, used in automotive and electrical applications. | Plating, Polishing, Lacquering | Automotive Connectors, Electrical Connectors, Springs |
| C210 | Low brass, good ductility and strength, used in fasteners and hardware. | Plating, Polishing, Lacquering | Fasteners, Hardware, Musical Instruments |
| C220 | Commercial bronze, used in jewelry and musical instruments. | Plating, Polishing, Lacquering | Jewelry, Musical Instruments, Architectural Hardware |
| C230 | Red brass, used in architectural applications and hardware. | Plating, Polishing, Lacquering | Architectural Applications, Hardware, Plumbing |
| Grade | Description | Finishing Options | Applications |
|---|---|---|---|
| 301 | Excellent machinability, used for making automotive parts bolts, nuts, and screws. | Polishing, Passivation, Bead blasting | Used for making automotive parts, bolts, nuts, and screws. |
| 304 | Most versatile and widely used stainless steel, used in kitchen equipment tanks, piping, and tubing. | Polishing, Brushing, Passivation | Used in kitchen equipment, tanks, piping, and tubing. |
| 304L | Low carbon version of 304, used for chemical containers and transport. | Electropolishing, Passivation, Bead blasting | Used for chemical containers and transport. |
| 316 | Contains molybdenum for increased corrosion resistance, used in marine applications and chemical processing equipment. | Polishing, Passivation, Bead blasting | Used in marine applications and chemical processing equipment. |
| 316L | Low carbon version of 316, used for surgical instruments and marine hardware. | Electropolishing, Passivation, Bead blasting | Used for surgical instruments and marine hardware. |
| 410 | Martensitic grade, used for fasteners and medical instruments. | Hardening, Polishing, Passivation | Used for fasteners and medical instruments. |
| 416 | High machinability, used for gears, shafts, and valves. | Polishing, Passivation, Bead blasting | Used for gears, shafts, and valves. |
| 420 | High hardness, used for surgical instruments and cutlery. | Hardening, Polishing, Passivation | Used for surgical instruments and cutlery. |
| 430 | Ferritic grade, used for automotive trim and dishwashers. | Polishing, Brushing, Passivation | Used for automotive trim and dishwashers. |
| Steel Alloy | Description | Finishing Options | Applications |
|---|---|---|---|
| 4140 | Chromium-molybdenum steel with high toughness and good fatigue strength. | Heat Treating, Anodizing, Powder Coating | Gears, Shafts, High-Stress Components |
| 4340 | Nickel-chromium-molybdenum steel with excellent toughness and strength. | Heat Treating, Anodizing, Powder Coating | Aircraft Landing Gear, Automotive Parts, Heavy Duty Shafts |
| 8620 | Nickel-chromium-molybdenum alloy steel, case hardening steel. | Carburizing, Heat Treating, Plating | Gears, Pins, Automotive Parts |
| 1018 | Low carbon steel, good weldability and machinability. | Painting, Powder Coating, Galvanizing | Structural Applications, Shafts, Spindles |
| 1045 | Medium carbon steel, high strength and impact resistance. | Heat Treating, Plating, Painting | Gears, Shafts, Machinery Parts |
| 4130 | Chromium-molybdenum alloy steel, good strength and toughness. | Heat Treating, Anodizing, Powder Coating | Aircraft Components, Bicycle Frames, Automotive Parts |
| 1210 | Low carbon steel, good formability and weldability. | Galvanizing, Painting, Powder Coating | Automotive Parts, Machinery Components, Structural Steel |
| 17-4 PH | Precipitation-hardening stainless steel, high strength and hardness. | Heat Treating, Anodizing, Passivation | Aerospace Components, High-Strength Applications |
| Titanium Alloy | Description | Finishing Options | Applications |
|---|---|---|---|
| Grade 1 | Commercially pure titanium, excellent corrosion resistance and formability. | Anodizing, Polishing, Sandblasting | Chemical Processing, Marine, Medical |
| Grade 2 | Commercially pure titanium, balance of strength and ductility. | Anodizing, Polishing, Sandblasting | Aerospace, Medical, Marine |
| Grade 5 (Ti-6Al-4V) | Most commonly used titanium alloy, high strength and light weight. | Anodizing, Polishing, Heat Treating | Aerospace, Medical Implants, Marine |
| Grade 9 | Titanium alloy with good weldability and cold formability. | Anodizing, Polishing, Sandblasting | Aerospace, Chemical Processing, Marine |
| Grade 23 (Ti-6Al-4V ELI) | Extra-low interstitial variant of Grade 5, high strength and toughness. | Anodizing, Polishing, Heat Treating | Medical Implants, Aerospace, Marine |
| Grade 7 | Commercially pure titanium with excellent corrosion resistance. | Anodizing, Polishing, Sandblasting | Chemical Processing, Marine, Medical |
| Grade 12 | Titanium alloy with excellent corrosion resistance and strength. | Anodizing, Polishing, Heat Treating | Chemical Processing, Marine, Aerospace |
| Plastic Material | Description | Finishing Options | Applications |
|---|---|---|---|
| ABS | Acrylonitrile Butadiene Styrene, good impact resistance and toughness. | Painting, Plating, Sanding | Automotive Parts, Consumer Products, Enclosures |
| PC | Polycarbonate, high impact resistance and transparency. | Polishing, Sandblasting, Painting | Optical Discs, Safety Equipment, Automotive Parts |
| PMMA | Polymethyl Methacrylate (Acrylic), excellent optical clarity and weather resistance. | Polishing, Sanding, Painting | Displays, Lenses, Lighting Fixtures |
| POM | Polyoxymethylene (Delrin/Acetal), high stiffness and low friction. | Machining, Sanding, Polishing | Gears, Bearings, Medical Devices |
| PEEK | Polyetheretherketone, high temperature and chemical resistance. | Machining, Sanding, Polishing | Aerospace, Medical Implants, Semiconductor Parts |
| PP | Polyphenylene , high mechanical and thermal properties. | Machining, Sanding, Polishing | Automotive, Electrical Components, Industrial Applications |
| PA66 | Polyamide (Nylon 66), high mechanical strength and rigidity. | Machining, Sanding, Polishing | Mechanical Parts, Automotive, Electrical Insulation |
| PEI | Polyetherimide (Ultem), high strength and excellent electrical properties. | Machining, Sanding, Polishing | Aerospace, Medical Devices, Electrical Components |
| SAN | Styrene Acrylonitrile, good chemical resistance and transparency. | Machining, Sanding, Polishing | Housewares, Cosmetic Containers, Automotive Parts |
| HIPE | High Impact Polystyrene, good impact resistance and machinability. | Machining, Sanding, Painting | Packaging, Consumer Products, Electrical Insulation |
| HIPD | High Impact Polypropylene, high impact resistance and low density. | Machining, Sanding, Painting | Automotive Parts, Industrial Applications, Consumer Goods |
| Fiber-Reinforced Materials | Composite materials with enhanced mechanical properties. | Machining, Sanding, Painting | Aerospace, Automotive, Sporting Goods |
With Tuowei Precision’s CNC milling service, you’re not just investing in advanced machinery. You’re gaining the assurance of flawless precision, commitment to strict timelines, and the expertise of skilled professionals dedicated to meeting your needs.
Tuowei Precision’s ISO-certified CNC machining guarantees exceptional accuracy and quality. Every part is crafted for perfect fit and flawless performance, with rigorous quality control at each stage.
Stay on schedule with Tuowei Precision. Our state-of-the-art equipment and local workshops deliver rapid production to meet your tight deadlines.
Rely on our team for comprehensive CNC machining support. Our experts are available to optimize design efficiency and ensure top-quality results at every step.
From detailed prototypes to high-volume production runs, TUOWEI is your trusted partner for precision CNC machining. Reach out today and take the first step toward streamlined, high-quality manufacturing solutions.
Whether you’re creating a small batch of custom parts or scaling up for high-volume production, Tuowei Proto services offer the flexibility you need.
CNC rapid prototype machining is perfect for creating engineering or production prototypes that closely resemble the final product in both appearance and functionality. At Tuowei, we offer instant quotes and fast delivery, providing you with precise, high-quality CNC machined prototypes for your needs.
Low volume CNC machining often acts as a bridge between prototyping and mass production for new and emerging production. With Tuowei, this process becomes easier, more efficient, and cost-effective, allowing you to scale production quickly while maintaining high-quality standards.
CNC production machining is the best solution for producing a thousand parts or more efficiently. Leveraging a diverse selection of materials and automation and multi-axis capabilities, Tuowei delivers high-volume production with tight tolerances, superior dimensional accuracy, high reliability and fast turnaround times.
Stay ahead with expert tips, industry trends, and precision manufacturing insights from the team at Tuowei. Read our latest blogs to gain valuable knowledge and discover how we’re shaping the future of CNC production.
abc
abc
How does CNC machining work?
CNC machining is a subtractive manufacturing process where raw material is shaped into its final form by precisely removing material. This involves drilling holes, boring slots, creating pathways, and cutting stock into parts with varying shapes, diameters, and tapers. Unlike additive manufacturing — which builds shapes layer by layer — or injection molding — which forms parts using molten material in a mold — CNC machining achieves accuracy by subtraction.
Its versatility allows CNC machining to work with metals, plastics, wood, composites, foam, and even glass. This wide material compatibility makes it a trusted choice across industries, helping engineers and designers bring concepts to life with accuracy and efficiency.
How does CNC machining differ from traditional machining?
Traditional machining relies on manual operation, where a machinist uses hand controls, dials, and measurement tools to shape and check parts according to design drawings. Skilled operators perform cutting, drilling, milling, or grinding, relying heavily on hands-on precision.
CNC machining performs the same processes but automates them through computer numerical control. Programs direct the cutting tools using Cartesian coordinates, allowing for accuracy and repeatability — whether it’s the first cut or the 500th.
This automation makes CNC machining more precise, consistent, and scalable. It has largely replaced traditional methods in industrial production while still using similar fundamentals of cutting and forming.
Will I need to pay tariffs on internationally produced parts?
TUOWEI ensures transparent pricing. For international orders, tariffs and shipping fees are included in the final quoted cost of standard parcels, so there are no hidden charges.
Do you offer Quick-Turn CNC Machining?
Yes. TUOWEI provides quick-turn CNC services with lead times as fast as 3–4 days for many parts. For urgent projects, we offer expedite options and work closely with clients to ensure deadlines are met without compromising quality.
What industries use CNC machining?
CNC machining is used across a wide range of industries. It plays a key role in aerospace, automotive, medical devices, consumer electronics, robotics, energy, and communications. It’s also applied in oil and gas, agriculture, household goods, and industrial equipment.
Its ability to deliver precision, speed, and versatility makes it one of the most widely used manufacturing processes worldwide.
What is the history of CNC machining?
The roots of CNC machining trace back to World War II, when the need for efficient production of aircraft, ships, and vehicles was at its peak. John T. Parsons, working on helicopter rotor blades, was among the first to explore computational methods to achieve complex shapes.
Building on his work, MIT’s Servomechanisms Laboratory developed machines that used numerical control and Cartesian coordinates to automate manufacturing tasks. This breakthrough laid the foundation for modern CNC machining.
Over the decades, CNC technology advanced rapidly, evolving into today’s sophisticated, software-driven systems capable of producing parts with exceptional accuracy and speed.
What are your inspection options for CNC machining?
TUOWEI provides multiple inspection solutions to match customer requirements. Every part undergoes a standard inspection included in the quoted price and lead time. For projects needing advanced validation, we offer detailed inspection options such as dimensional reports, CMM checks, and full quality certifications.
Engineering&Manufacturing
From Prototype to Production