Skip to content Get high-precision CNC milled parts engineered for accuracy, repeatability, and fast production. We deliver consistent results across metals and plastics using advanced 3-axis, 4-axis, and 5-axis CNC milling systems—ideal for prototypes, tooling, and full-scale manufacturing. Every part is machined for dimensional stability, clean surface finishes, and reliable performance in demanding applications.
Fast quoting, tight tolerances, and secure global delivery supported by certified quality processes.
ISO 9001:2015 | AS9100D | ISO 13485 | ITAR Compliant
ISO 9001:2015 | AS9100D | ISO 13485 | ITAR Compliant
Yicenprecision Instant Quoting Engine is covered by U.S. Pat. Nos. 11,086,292, 11,347,201, 11,693,388, 11,698,623, 12,099,341, and 12,189,361. Other patents pending.
CNC milling is a subtractive machining process that uses multi-axis motion control, rotary cutting tools, and digital toolpaths to produce accurate, repeatable parts from aluminum, stainless steel, steel alloys, brass, copper, and engineering plastics. It supports complex geometries, stable dimensional accuracy, and consistent surface roughness for both prototypes and production parts.
Our CNC turning capabilities are engineered for consistent accuracy, smooth finishes, and efficient production cycles across metal and plastic components. Each setup supports reliable machining for both prototypes and large-batch manufacturing.
Improved tool access and multi-face machining that reduces setups and enhances alignment for complex parts.
High-precision machining for complex surfaces, deep features, and aerospace/medical-grade components requiring tight GD&T control.
Supports aluminum, stainless steel, steel alloys, copper alloys, titanium, and engineering plastics (ABS, POM, Nylon, PEEK, PC).
Our turning centers support a wide range of diameters, lengths, and feature types, ensuring reliable machining for small precision components and larger rotational parts.
| Capability | 3-Axis CNC Milling | 4-Axis CNC Milling | 5-Axis CNC Milling |
|---|---|---|---|
| Maximum Part Size | 1000 × 500 × 500 mm | 1000 × 500 × 500 mm | 4000 × 1500 × 600 mm |
| Minimum Part Size | 5 × 5 × 5 mm | 5 × 5 × 5 mm | 5 × 5 × 5 mm |
| General Tolerances | ±0.10 mm | ±0.08 mm | ±0.05 mm |
| Achievable Tolerances (precision jobs) | ±0.02 mm | ±0.01 mm | ±0.005 mm |
Engineers and leading manufacturers trust Yicen Precision for fast iterations and durable, high-performance parts. Whether for prototyping or full-scale production, our extensive material selection ensures precision, strength, and reliability for any CNC machining project.
| 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 |
Discover our expert precision cnc milling services, where accuracy meets performance at every stage. From intricate prototypes to production-ready components, our custom cnc milling services deliver high-accuracy parts. Every cut, every contour, crafted with exceptional quality, consistency, and attention to detail.
Precision-milled parts benefit from specialized surface treatments that enhance strength, durability, and overall performance. These treatments are ideal for optimizing the functionality of shafts, bushings, and cylindrical components.
The quickest and most economical option, leaving visible tool marks and potentially sharp edges or burrs. Surface roughness is approximately 125 µin Ra, and burrs can be removed upon request.
A thick chromium coating that boosts hardness, wear resistance, and durability. Perfect for high-stress parts like shafts and pistons.
A thin, electroplated nickel layer that enhances wear and corrosion resistance. Provides a bright, attractive finish for functional parts.
A chemical treatment that creates a dark, matte black surface on steel parts. Offers mild corrosion resistance and reduces light reflection.
A smooth, glossy finish achieved by mechanical buffing. Ideal for decorative parts requiring enhanced shine and low roughness.
A linear, satin-like texture created using abrasive belts or brushes. It reduces minor imperfections and offers a clean, decorative appearance.
Need a specific finish? Submit an RFQ, and we’ll work with you to find a tailored solution for your project.
Creates a smooth, matte finish by media-blasting, typically with glass beads, offering an improved aesthetic and uniform surface texture.
These guidelines help ensure machinability, stable tolerances, and predictable surface quality for CNC-milled parts.
| Design Feature | Recommended Guideline | Why It Matters |
|---|---|---|
| Minimum Wall Thickness | Metals: ≥ 0.8–1.0 mmPlastics: ≥ 1.2–1.5 mm | Prevents vibration, tool chatter, and part deformation |
| Internal Radii | Radius ≥ 0.5 × tool diameterAvoid sharp inside corners | Improves tool access and reduces machining time |
| Pocket & Cavity Depth | Depth ≤ 10× tool diameter | Deep pockets reduce accuracy and surface finish |
| Threads & Tapped Holes | Hole depth: 3× Ø (small threads)4–6× Ø (larger threads) | Ensures clean threads and tool stability |
| Text & Engraving | Min width: 0.5 mmMin depth: 0.1 mm | Clean, readable engraving for part marking |
| Undercuts & Slots | Standard profiles: square, full-radius, dovetail | Improves tool compatibility and reduces cost |
| Chamfers & Fillets | Use standard tool sizesChamfers preferred for deburring | Enhances machinability and safe handling |
| Tolerance Considerations | Tight tolerances (±0.001″) require GD&T drawings | Improves accuracy, inspection, and quoting clarity |
Our turning centers support a wide range of diameters, lengths, and feature types, ensuring reliable machining for small precision components and larger rotational parts.
| Milling Type | Maximum Size Limits | Ideal Applications | Notes |
|---|---|---|---|
| 3-Axis CNC Milling | 1000 × 600 × 400 mm | Flat surfaces, pockets, slots, profiles, precision 2.5D geometry | Best balance of speed, accuracy, and cost |
| 4-Axis CNC Milling | Ø 250 mm × 400 mm (L) | Rotary features, angled cuts, spiral milling | Reduces multiple setups, improves concentricity |
| 5-Axis CNC Milling | 500 × 500 × 300 mm | Complex contours, deep cavities, multi-angle surfaces | Enables single-setup machining and superior surface finish |
Our CNC milling quality workflow focuses on dimensional accuracy, surface integrity, and GD&T-controlled features across prototypes and production parts.
Parts are checked on calibrated equipment, including CMM, digital gauges, and precision metrology tools. We validate: Critical datums, Hole locations, and Feature relationships for GD&T-driven geometries
All cnc-milled components are inspected per ASME Y14.5 and ISO standards. Common controls verified: Position, Profile, Parallelism and Perpendicularity
Surface and geometric characteristics are measured using roughness testers, granite plates, and runout indicators. Checks include: Ra profiling, Flatness & parallelism and Runout for rotating or mating surfaces
FAI reports, material certificates (MTRs), and CMM data available
Lot tracking for aerospace, medical, and industrial requirements
Secure record-keeping for full audit trail and quality compliance
Yicen Precision is serving a broad spectrum of industries, covering aerospace, automotive, electronics, medical, and more. We specialize in providing high-quality, reliable parts tailored to meet the unique engineering challenges of each industry.
Easily upload your CAD files through our secure online platform to get started.
Choose your material, finish, tolerances, and preferred lead time to match your project needs.
Receive a real-time quote based on your design and selected specifications, no delays.
Your parts are manufactured by trusted partners, quality-checked, and delivered to your door on time.
Advantages
CNC milling provides a range of benefits, ensuring efficient, high-quality production.
Applications
CNC milling is widely utilized in various industries to produce high-precision parts and components:
We specialize in converting your ideas into high-quality, functional components with unparalleled speed and accuracy. With advanced technology and expert craftsmanship, we create parts that meet the most complex specifications.
How can I reduce CNC milling costs without hurting quality?
To keep machining cost-effective:
Can you support both prototypes and mass production?
Yes.
What file formats do you accept?
We accept all industry-standard CAD formats:
STEP, STP, IGES, SLDPRT, Parasolid, DXF, Fusion 360.
STEP is preferred because it preserves precise surfaces and dimensions needed for accurate toolpath generation.
How long does CNC milling take?
Lead times depend on material, geometry, and quantity:
Why do CNC-milled parts sometimes warp or distort?
Warping usually results from:
How do you ensure machining accuracy and consistency?
Accuracy is maintained using:
What is the difference between 3-axis, 4-axis, and 5-axis CNC milling?
What materials are suitable for CNC milling?
We machine a wide range of engineering-grade materials:
What tolerances can you achieve?
Standard CNC milling tolerances are ±0.005″ (±0.127 mm).
For precision-critical features, we can reach ±0.001″ (±0.025 mm) with stable fixturing, optimized toolpaths, and machinable materials.
Flatness/parallelism can be held to ≤ 0.002″ per 6″ depending on part size and rigidity.
What is CNC milling used for?
CNC milling is used to produce precise metal and plastic components with flat surfaces, pockets, contours, and multi-axis geometries. It’s ideal for brackets, housings, enclosures, tooling plates, heat sinks, and structural parts across aerospace, medical, automotive, robotics, and industrial equipment sectors.
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