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
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.
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 | ±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, structural alloy | Anodizing, Polishing | Automotive, Aerospace |
| 7075 | High strength, military grade | Anodizing, Coating | Aircraft, Defense |
| 2024 | High fatigue resistance | Cladding, Painting | Structural Components |
| 5052 | Marine grade, corrosion resistant | Painting, Polishing | Marine, Sheet Metal |
| 5083 | Extreme environment performance | Anodizing, Painting | Chemical, Industrial |
| 6082 | Excellent extrudability | Powder Coating, Polishing | Window Frames |
| 7050 | Stress corrosion resistance | Anodizing, Cladding | High-stress Aerospace |
| 1100 | Commercially pure aluminum | Polishing, Anodizing | Food Processing |
| Brass Type | Description | Finishing Options | Applications |
| C360 | Free-cutting, high machinability | Polishing, Lacquering | Plumbing, Fittings |
| C464 | Naval brass, seawater resistant | Bead Blasting, Polishing | Marine Hardware |
| C260 | Cartridge brass, highly ductile | Polishing, Coating | Automotive Parts |
| C353 | Leaded brass for precision | Deburring, Buffing | Gears, Watch Parts |
| C857 | Leaded yellow brass | Polishing, Plating | Decorative Ornaments |
| C485 | High speed machining naval brass | Bead Blasting, Coating | Fasteners, Valves |
| C687 | Aluminum-brass for condensers | Polishing, Sanding | Heat Exchangers |
| C230 | Red brass, acid resistant | Polishing, Lacquering | Architectural Pipes |
| Copper Type | Description | Finishing Options | Applications |
| C101 | Oxygen-free, max conductivity | Polishing, Plating | Electrical Components |
| C110 | Electrolytic tough pitch | Bead Blasting, Polishing | Power Connectors |
| C172 | Beryllium copper, high strength | Coating, Polishing | Precision Springs |
| C145 | Tellurium copper, fast cutting | Deburring, Polishing | Nozzles, Tips |
| C510 | Phosphor bronze, fatigue resistant | Sanding, Polishing | Bearing Sleeves |
| C122 | Phosphorus-deoxidized copper | Polishing, Coating | Refrigerator Tubes |
| C182 | Chromium copper, heat stable | Bead Blasting, Coating | Resistance Welding |
| C706 | Copper-nickel, subsea stable | Polishing, Sanding | Marine Piping |
| Stainless Type | Description | Finishing Options | Applications |
| 304 | Standard food-grade alloy | Passivation, Polishing | Sinks, Food Processing |
| 316 | Marine grade, acid resistant | Electropolishing, Sanding | Medical, Marine |
| 303 | Free-machining stainless | Bead Blasting, Polishing | Bolts, Shafts, Nuts |
| 17-4 PH | Precipitation hardened steel | Coating, Polishing | Defense, Aerospace |
| 410 | Wear resistant martensitic | Hardening, Polishing | Surgical Tools |
| 430 | Ferritic grade, good finish | Buffing, Polishing | Kitchen Appliances |
| 2205 | Duplex steel, high strength | Passivation, Deburring | Oil & Gas Equipment |
| 440C | Ultra-hard, high carbon | Precision Grinding | Ball Bearings |
| Steel Alloy | Description | Finishing Options | Applications |
| 4140 | Chromium-molybdenum steel | Black Oxide, Hardening | Axles, Heavy Gears |
| 1018 | Mild low-carbon steel | Case Hardening, Sanding | Fixtures, Rods, Pins |
| 12L14 | Resulfurized for fast speed | Zinc Plating, Polishing | Screw Machine Parts |
| 8620 | Nickel-chrome-moly alloy | Carburizing, Sanding | Heavy-duty Gears |
| 4340 | High toughness, high stress | Heat Treating, Coating | Aircraft Landing Gear |
| 1045 | Medium carbon, moderate strength | Hardening, Polishing | Crankshafts, Bolts |
| 52100 | High-wear chromium steel | Precision Polishing | Bearings, Bushings |
| A36 | Structural steel for construction | Painting, Sanding | Brackets, Plates |
| Titanium Type | Description | Finishing Options | Applications |
| Grade 5 | Ti-6Al-4V, aerospace standard | Polishing, Blasting | Turbine Blades |
| Grade 2 | Pure titanium, acid stable | Blasting, Passivation | Chemical Processing |
| Grade 23 | High purity medical grade | Deburring, Polishing | Surgical Implants |
| Grade 9 | Mid-strength for hydraulics | Anodizing, Polishing | Hydraulic Tubing |
| Grade 1 | Softest, most ductile grade | Polishing, Sanding | Heat Exchangers |
| Grade 7 | Palladium-enhanced titanium | Deburring, Blasting | Specialty Valves |
| Grade 12 | Superior heat resistance | Polishing, Coating | Industrial Tanks |
| Beta-C | Flexible for high-end springs | Anodizing, Buffing | Racing Car Springs |
| Plastic Material | Key Description | Finishing Options | Key Applications |
| ABS | Tough, impact-resistant, and cost-effective. | Painting, Sanding, Polishing | Prototypes, Enclosures |
| Nylon (PA6) | High strength with excellent wear resistance. | As-machined, Sanding | Gears, Bearings, Bushings |
| Polycarbonate (PC) | High impact strength and optical clarity. | Vapor Polishing, Sanding | Safety Shields, Lenses |
| POM (Delrin) | High stiffness and very low friction. | As-machined, Deburring | Precision Gears, Fasteners |
| PEEK | High-performance plastic with heat resistance. | Polishing, Bead Blasting | Aerospace, Medical Implants |
| PTFE (Teflon) | Exceptional chemical and heat resistance. | As-machined, Sanding | Gaskets, Chemical Seals |
| Acrylic (PMMA) | Excellent transparency and weather resistance. | Mirror Polishing, Sanding | Display Cases, Signage |
| PVC | Cost-effective and chemically stable. | Painting, Sanding | Pipes, Chemical Tanks |
| HDPE | High moisture resistance and impact strength. | As-machined, Deburring | Food Processing, Containers |
| UHMWPE | Extreme wear resistance and self-lubricating. | As-machined, Sanding | Conveyor Guides, Liners |
| PET | High dimensional stability and strength. | Polishing, Sanding | Food Packaging, Frames |
| Ultem (PEI) | High dielectric strength and heat resistance. | Bead Blasting, Sanding | Electrical Insulators |
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 most economical option with a standard roughness of 125 µin Ra. It features visible tool marks, but we ensure all sharp burrs are removed for a clean, professional feel.
Adds a thick chromium layer to significantly boost surface hardness and durability. It’s the ideal solution for high-friction milling 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.
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.
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 mm Plastics: ≥ 1.2–1.5 mm |
Prevents vibration, tool chatter, and part deformation. |
| Internal Radii | Radius ≥ 0.5 × tool diameter (Avoid 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) / 4–8× Ø (larger) | Ensures clean threads and tool stability. |
| Text & Engraving | Min width: 0.5 mm / Min depth: 0.1 mm | Ensures 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 sizes; chamfers 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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