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High-Precision CNC Machining for Metal and Plastic Components

Receive top-tier CNC machining solutions tailored to your specific requirements. From quick-turn prototypes to large-volume production runs, our advanced milling and turning processes guarantee precise tolerances, swift delivery, and superior surface quality with every order.

Cnc Machining Service
Precision Milling Operation, CNC machining services

Precision CNC Manufacturing Solutions for Complex Requirements

Our CNC machining solutions are engineered to provide accurate, high-performance manufacturing support across demanding sectors such as semiconductors and more. Services include CNC milling, turning, surface grinding, wire EDM, and custom prototyping using advanced multi-axis equipment. We excel in crafting precision metal and plastic parts with tight tolerances, repeatable accuracy, and quick delivery. These scalable, cost-effective processes help streamline your product development and production cycles.

Yicen CNC Machining Tolerances – From ±0.001” to Industry Standards

We provide CNC machining services that guarantee tight tolerances and exceptional accuracy—so every part meets the highest quality standards. The following table outlines the typical tolerance ranges, ensuring consistency, accuracy, and reliability in every custom machining project we complete.

Parameter Specification
General Dimensional Tolerances ±0.005” (±0.127 mm) for metals ±0.010” (±0.254 mm) for plastics In line with ISO 2768-mK unless otherwise specified
Tight Tolerances Down to ±0.001” (±0.025 mm) available upon request, with detailed 2D drawings and GD&T specifications
Minimum Feature Size ~0.020” (0.50 mm), depends on part geometry, tool diameter, and material
Hole Diameter Tolerance ±0.002” (±0.05 mm) typical; tighter tolerances with boring or reaming
Flatness/Parallelism ≤ 0.002” per 6” (≤ 0.05 mm per 150 mm), varies by material and fixture setup
Thread Tolerances Standard metric and imperial threads per ISO/ASME; custom or fine threads available on request
Angular Tolerance ±0.5° typical
Surface Finish (Standard) Ra 3.2 μm (125 μin) as-machined; improved finishes available via polishing, bead blasting, anodizing, etc.

Tailored CNC Machining Services for Specialized Component Needs

Yicen Precision provides fully customized CNC machining solutions designed to meet your specific design and demands. Whether it’s a one-off prototype or a high-volume production run, our skilled team and cutting-edge equipment deliver precise results with exceptional attention to detail. Capable of handling intricate geometries and tight tolerances, our flexible approach ensures components align seamlessly with your application needs, boosting both performance and production efficiency.

Machined Components Display

Design Guidelines for CNC Machining

Optimize your designs for manufacturability with our helpful guidelines. Our experts provide feedback on your custom machined part for the best results in CNC machining.
Radii In CNC machining, sharp internal corners on a workpiece will naturally form rounded corners (radii). The depth must not exceed 12 times the diameter of the drill. For end mills, the depth must not exceed 10 times the diameter of the tool.
Threads and Tapped Holes Diameter Φ 1.5-5 mm, depth: 3 times the diameter. Diameter Φ 5 mm or larger, depth: 4-6 times the diameter. Yicen Precision can produce threads of any specification and size as required by the customer.
Undercuts Square profiles, full radius, dovetail profiles.
Text CNC Milling: Minimum width of 0.5 mm and depth of 0.1 mm.
CNC Turning: Yicen Precision can use laser marking to create standard text for CNC turned parts.
Yicen Precision can create standard text via CNC engraving or laser engraving as per customer requirements.

Materials for CNC Machining Service Parts

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 AlloyDescriptionFinishing OptionsApplications
6061Versatile and commonly used for structural applications.Anodizing, Powder Coating, PolishingConstruction, Aerospace, Automotive
7075High strength, ideal for aerospace and military applications.Anodizing, Powder Coating, PolishingAerospace, Military, High-Strength Components
2024Known for its high strength and excellent fatigue resistance.Anodizing, Cladding, PaintingAerospace, Military, Structural Components
5052Good corrosion resistance and formability, used in marine and automotive applications.Anodizing, Painting, PolishingMarine, Automotive, Sheet Metal Work
5083Exceptional performance in extreme environments, particularly marine applications.Anodizing, Painting, PolishingMarine, Chemical, Industrial
6082Excellent extrudability, used for architectural and engineering applications.Anodizing, Powder Coating, PolishingArchitecture, Engineering, Window Frames
7050High strength and stress corrosion resistance, often used in aerospace.Anodizing, Cladding, PaintingAerospace, High-Stress Components
1100Commercially pure aluminum, excellent corrosion resistance and workability.Anodizing, Painting, PolishingChemical Equipment, Food Processing, Heat Exchangers
Brass AlloyDescriptionFinishing OptionsApplications
C260Cartridge brass, excellent for cold working.Plating, Polishing, LacqueringAmmunition, Heat Exchangers, Plumbing
C360Free machining brass, used for precision parts.Plating, Polishing, LacqueringPrecision Machined Parts, Fasteners, Plumbing
C353High leaded brass, high strength, used in plumbing.Plating, Polishing, LacqueringPlumbing, Fasteners, Valve Components
C385Architectural bronze, applications for its decorative appeal.Plating, Polishing, LacqueringArchitectural Trim, Ornamental Hardware, Plumbing
C272Yellow brass, excellent corrosion resistance, used in electrical components.Plating, Polishing, LacqueringElectrical Components, Fasteners, Plumbing
Copper AlloyDescriptionFinishing OptionsApplications
C101Oxygen-free, high conductivity, used in electrical applications.Plating, Polishing, LacqueringElectrical Conductors, Switches, Terminals
C110Electrolytic tough pitch, highly conductive, used in electrical and plumbing.Plating, Polishing, LacqueringElectrical Wiring, Plumbing, Busbars
C122Phosphorus-deoxidized, used in heat exchangers and radiators.Plating, Polishing, LacqueringHeat Exchangers, Radiators, Plumbing
C172Beryllium copper, high strength, used in aerospace and oil drilling.Plating, Polishing, LacqueringAerospace, Oil Drilling, Springs
C194High conductivity, used in automotive and electrical applications.Plating, Polishing, LacqueringAutomotive Connectors, Electrical Connectors, Springs
C210Low brass, good ductility and strength, used in fasteners and hardware.Plating, Polishing, LacqueringFasteners, Hardware, Musical Instruments
C220Commercial bronze, used in jewelry and musical instruments.Plating, Polishing, LacqueringJewelry, Musical Instruments, Architectural Hardware
C230Red brass, used in architectural applications and hardware.Plating, Polishing, LacqueringArchitectural Applications, Hardware, Plumbing
GradeDescriptionFinishing OptionsApplications
301Excellent machinability, used for making automotive parts bolts, nuts, and screws.Polishing, Passivation, Bead blastingUsed for making automotive parts, bolts, nuts, and screws.
304Most versatile and widely used stainless steel, used in kitchen equipment tanks, piping, and tubing.Polishing, Brushing, PassivationUsed in kitchen equipment, tanks, piping, and tubing.
304LLow carbon version of 304, used for chemical containers and transport.Electropolishing, Passivation, Bead blastingUsed for chemical containers and transport.
316Contains molybdenum for increased corrosion resistance, used in marine applications and chemical processing equipment.Polishing, Passivation, Bead blastingUsed in marine applications and chemical processing equipment.
316LLow carbon version of 316, used for surgical instruments and marine hardware.Electropolishing, Passivation, Bead blastingUsed for surgical instruments and marine hardware.
410Martensitic grade, used for fasteners and medical instruments.Hardening, Polishing, PassivationUsed for fasteners and medical instruments.
416High machinability, used for gears, shafts, and valves.Polishing, Passivation, Bead blastingUsed for gears, shafts, and valves.
420High hardness, used for surgical instruments and cutlery.Hardening, Polishing, PassivationUsed for surgical instruments and cutlery.
430Ferritic grade, used for automotive trim and dishwashers.Polishing, Brushing, PassivationUsed for automotive trim and dishwashers.
Steel AlloyDescriptionFinishing OptionsApplications
4140Chromium-molybdenum steel with high toughness and good fatigue strength.Heat Treating, Anodizing, Powder CoatingGears, Shafts, High-Stress Components
4340Nickel-chromium-molybdenum steel with excellent toughness and strength.Heat Treating, Anodizing, Powder CoatingAircraft Landing Gear, Automotive Parts, Heavy Duty Shafts
8620Nickel-chromium-molybdenum alloy steel, case hardening steel.Carburizing, Heat Treating, PlatingGears, Pins, Automotive Parts
1018Low carbon steel, good weldability and machinability.Painting, Powder Coating, GalvanizingStructural Applications, Shafts, Spindles
1045Medium carbon steel, high strength and impact resistance.Heat Treating, Plating, PaintingGears, Shafts, Machinery Parts
4130Chromium-molybdenum alloy steel, good strength and toughness.Heat Treating, Anodizing, Powder CoatingAircraft Components, Bicycle Frames, Automotive Parts
1210Low carbon steel, good formability and weldability.Galvanizing, Painting, Powder CoatingAutomotive Parts, Machinery Components, Structural Steel
17-4 PHPrecipitation-hardening stainless steel, high strength and hardness.Heat Treating, Anodizing, PassivationAerospace Components, High-Strength Applications
Titanium AlloyDescriptionFinishing OptionsApplications
Grade 1Commercially pure titanium, excellent corrosion resistance and formability.Anodizing, Polishing, SandblastingChemical Processing, Marine, Medical
Grade 2Commercially pure titanium, balance of strength and ductility.Anodizing, Polishing, SandblastingAerospace, Medical, Marine
Grade 5 (Ti-6Al-4V)Most commonly used titanium alloy, high strength and light weight.Anodizing, Polishing, Heat TreatingAerospace, Medical Implants, Marine
Grade 9Titanium alloy with good weldability and cold formability.Anodizing, Polishing, SandblastingAerospace, Chemical Processing, Marine
Grade 23 (Ti-6Al-4V ELI)Extra-low interstitial variant of Grade 5, high strength and toughness.Anodizing, Polishing, Heat TreatingMedical Implants, Aerospace, Marine
Grade 7Commercially pure titanium with excellent corrosion resistance.Anodizing, Polishing, SandblastingChemical Processing, Marine, Medical
Grade 12Titanium alloy with excellent corrosion resistance and strength.Anodizing, Polishing, Heat TreatingChemical Processing, Marine, Aerospace
Plastic MaterialDescriptionFinishing OptionsApplications
ABSAcrylonitrile Butadiene Styrene, good impact resistance and toughness.Painting, Plating, SandingAutomotive Parts, Consumer Products, Enclosures
PCPolycarbonate, high impact resistance and transparency.Polishing, Sandblasting, PaintingOptical Discs, Safety Equipment, Automotive Parts
PMMAPolymethyl Methacrylate (Acrylic), excellent optical clarity and weather resistance.Polishing, Sanding, PaintingDisplays, Lenses, Lighting Fixtures
POMPolyoxymethylene (Delrin/Acetal), high stiffness and low friction.Machining, Sanding, PolishingGears, Bearings, Medical Devices
PEEKPolyetheretherketone, high temperature and chemical resistance.Machining, Sanding, PolishingAerospace, Medical Implants, Semiconductor Parts
PPPolyphenylene , high mechanical and thermal properties.Machining, Sanding, PolishingAutomotive, Electrical Components, Industrial Applications
PA66Polyamide (Nylon 66), high mechanical strength and rigidity.Machining, Sanding, PolishingMechanical Parts, Automotive, Electrical Insulation
PEIPolyetherimide (Ultem), high strength and excellent electrical properties.Machining, Sanding, PolishingAerospace, Medical Devices, Electrical Components
SANStyrene Acrylonitrile, good chemical resistance and transparency.Machining, Sanding, PolishingHousewares, Cosmetic Containers, Automotive Parts
HIPEHigh Impact Polystyrene, good impact resistance and machinability.Machining, Sanding, PaintingPackaging, Consumer Products, Electrical Insulation
HIPDHigh Impact Polypropylene, high impact resistance and low density.Machining, Sanding, PaintingAutomotive Parts, Industrial Applications, Consumer Goods
Fiber-Reinforced MaterialsComposite materials with enhanced mechanical properties.Machining, Sanding, PaintingAerospace, Automotive, Sporting Goods

Surface Finishing for CNC Machining

CNC machining delivers high-precision, functional parts, but surface finishing is key to enhancing durability, aesthetics, and overall performance. At Yicen Machining, we provide a variety of post-machining surface treatments tailored to your specific design and application needs.

As-Milled

 The standard finish with visible tool marks. Ideal for functional components where appearance is not a primary concern.

Bead Blasting

 A fine abrasive is applied to produce a smooth, matte finish, perfect for achieving uniform texture and visual appeal.

Powder Coating

 A tough, colored coating that offers superior resistance to wear and corrosion. Available in various colors and finishes.

Brushing

 Generates a consistent, linear grain across metal surfaces, commonly used for decorative or semi-cosmetic applications.

Polishing

 Delivers a glossy, mirror-like finish that enhances visual appeal, especially for consumer-facing or display parts.

Electropolishing

 An electrochemical process that smooths and brightens metal surfaces while boosting corrosion resistance and cleanliness.

Anodizing

Anodizing improves corrosion resistance, surface hardness, and wear resistance while allowing for vibrant color options.

Passivation

Frequently applied to CNC-machined stainless steel parts to improve corrosion resistance, particularly in medical and food-grade components.

CNC Machining Services Precision in Every Detail

Discover our expert CNC machining services, where precision meets performance. From intricate prototypes to production-ready components, we craft high-accuracy parts trusted across aerospace, automotive, electronics, and more.
Every cut, every contour—engineered with exceptional quality and care.

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Transform Concepts into Precision Parts

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.

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The Complete Process Behind Custom CNC Machining Services for Metal & Plastic Parts

When you send us your CAD files, what happens next might surprise you. Custom CNC machining isn’t just about feeding material into a machine and hoping for the best – it’s a carefully orchestrated process that combines cutting-edge technology with decades of human expertise.

Step 1: Design Analysis and Material Selection

Our engineers spend the first 24 hours analyzing your design files, identifying potential manufacturing challenges before they become problems. We’ve learned that 73% of machining issues stem from material selection mistakes made early in the process. Whether you’re working with aluminum 6061, stainless steel 316, or engineering plastics like PEEK, we match your material properties to your application requirements. This upfront analysis typically saves our clients 15-20% in overall project costs.

Step 2: Advanced CAM Programming

Here’s where technology meets artistry. Our programmers use sophisticated CAM software to create toolpaths that maximize efficiency while maintaining precision. For complex 5-axis parts, this programming phase can take 8-12 hours, but it’s time well invested. We’re able to achieve tolerances down to ±0.0002″ consistently because every toolpath is optimized for the specific material and geometry we’re machining.

Step 3: Multi-Axis CNC Machining Technology

Our shop floor houses 3-axis, 4-axis, and 5-axis CNC machines capable of handling parts up to 40″ x 20″ x 16″. The 5-axis machines are game-changers – they can complete complex parts in a single setup that would traditionally require multiple operations. This reduces handling time by up to 60% and virtually eliminates the tolerance stack-up issues that plague multi-setup machining.

For precision turning, our CNC lathes accommodate parts from 0.125″ diameter up to 12″ diameter with live tooling capabilities. The combination of turning and milling in one setup has revolutionized how we approach complex cylindrical components.

Step 4: Quality Control Integration

Every part goes through our coordinate measuring machine (CMM) inspection process. We’re talking about measurement accuracy within 0.0001″ – that’s roughly 1/10th the thickness of a human hair. Our quality team documents every critical dimension, and we maintain statistical process control data that helps us continuously improve our processes.

Step 5: Surface Finishing and Secondary Operations

Depending on your requirements, we can achieve surface finishes from 125 Ra down to 8 Ra through various machining techniques and post-processing operations. Wire EDM capabilities allow us to create intricate profiles with 0.0001″ precision, perfect for tooling applications or complex aerospace components.

The Technology That Makes It Possible

Our investment in technology includes high-speed spindles running up to 15,000 RPM for aluminum parts and specialized tooling that extends tool life by 40% compared to standard carbide. Coolant systems maintain consistent temperatures within 2°F throughout long production runs, ensuring dimensional stability.

The result? Custom CNC machining services that deliver components exactly as designed, typically within 5-10 business days for prototypes and 2-3 weeks for production quantities. When precision matters, the process behind it matters even more.

Yicen Machining Solutions

Whether you’re creating a small batch of custom parts or scaling up for high-volume production, Yicen machining services offer the flexibility you need.
Rapid Prototyping
CNC rapid prototype machining is perfect for creating engineering or production prototypes that closely resemble the final product in both appearance and functionality. At Yicen, we offer instant quotes and fast delivery, providing you with precise, high-quality CNC machined prototypes for your needs.
Low Volume Manufacturing
Low volume CNC machining often acts as a bridge between prototyping and mass production for new and emerging production. With Yicen, this process becomes easier, more efficient, and cost-effective, allowing you to scale production quickly while maintaining high-quality standards.
End-use Production
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, Yicen delivers high-volume production with tight tolerances, superior dimensional accuracy, high reliability and fast turnaround times.

Insights & Articles

Explore Machining services blog for expert insights on CNC machining, industry trends, manufacturing tips, and technology updates—designed to keep you informed, inspired, and ahead in precision engineering.

Frequently Asked Questions

CNC Machining Services

  • Is there a minimum order quantity?

    No, we accommodate both small prototype runs and large production batches. 

  • Is there a minimum order quantity?

    No, we accommodate both small prototype runs and large production batches. 

  • What file formats do you accept for machining?

    We accept common CAD file formats like STEP, IGES, and DXF. 

  • How do you ensure quality control?

    We use precision measuring tools and in-process inspections to maintain tight tolerances. 

  • Do you provide prototype machining?

    Absolutely, rapid prototyping is one of our core strengths. 

  • What is the typical turnaround time?

    Turnaround depends on complexity but generally ranges from a few days to a couple of weeks. 

  • Can you handle custom designs?

    Yes, we specialize in custom CNC machining tailored to your exact specifications. 

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Get In Touch With Us!
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