Custom Online CNC Machining Services

Get instant quotes and fast-turn production for precision metal and plastic parts. Yicen delivers high-accuracy components through advanced 3-axis, 4-axis, and 5-axis CNC machining, achieving tolerances down to ±0.001 in (±0.025 mm) with consistent, repeatable quality across prototypes and production runs.

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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.

Why Choose Yicen Precision to CNC Machining?

Yicen provides high-quality and tight-tolerance machining that is backed by elaborate equipment, engineering skills and approved quality control. All components are manufactured with precision, consistent lead times and dependable worldwide supply.

Unmatched Accuracy

 Multi-axis machining to within +-0.001 in (+-0.025 mm) and consistent GD&T compliance on both metals and plastics.

DFAM Support ( by engineering)

 Your CAD is evaluated by senior engineers, geometry is optimized, and better-performing and less expensive materials and toolpaths are suggested.

Quick TT and Mass Production

 Machining centers with high capacity allow quick prototyping, low volume production, and any scale of production without delays.

80+ Certified Materials

 Aluminum, steel, stainless, brass, copper, titanium, engineering plastics, high-temp polymers, and demand sourcing.

Qualified Quality Assurance.

 CMM inspection, ISO compatible workflows, dimensional reports and aerospace, medical and industrial traceability

Consistent Customer Service

 Transparency with projects, safety in file management, and uninterrupted global shipping with engineering support at all levels.

CNC Machining Capabilities for Custom Precision Parts

With our developed manufacturing capacity, we will be able to produce high-precision metal and plastic parts, which produce the same level of consistency in the quality of prototypes, tooling, and full production. Having started with multi-axis milling, Yicen Precision has ensured reliability in the results even with most complex geometries, in terms of turning and development of the fixtures.

Yicen CNC Machining Tolerances

With our precision cnc machining services, you get tight tolerances and exceptionally accurate components that meet the most demanding industry requirements. Yicen delivers consistent results across both plastic and metal cnc machining services, ensuring every part matches your specifications with complete reliability. 

ParameterSpecification
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 TolerancesDown 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 TolerancesStandard 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.

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 Precision CNC Machining

CNC machining is not just about dimensional accuracy and surface finishing adds to durability, a much needed appearance and performance. Yicen Precision is a manufacturer of a comprehensive selection of post-machining finishes aimed at increasing corrosion and surface hardness, texture and aesthetic appeal of metal and plastic parts. Each finish choice is determined concerning the type of material used, the functional needs and end uses to obtain uniform reliable output.

As-Milled
Custom CNC Machining Services

A machining finish having the tool marks that can be seen, which is appropriate in functional parts where aesthetics is not that important.

Bead Blasting
Custom CNC Machining Services

The smooth matte surface is created by a fine stream of abrasive and it will be appropriate when it comes to smooth texture and enhanced attractiveness.

Powder Coating
Custom CNC Machining Services

A long-lasting, opaque, wear and corrosion-resistant, multi-textured coating, which comes in an extensive variety of textures and colors.

Brushing
Custom CNC Machining Services

Applies a homogeneous, linear finish to metal surfaces, typically to ornamental or semi-cosmetic parts.

Polishing
Custom CNC Machining Services

Offers a high quality gloss surface mirror finish that improves reflection and look and is frequently applied on consumer facing or display parts.

Electropolishing
Custom CNC Machining Services

A metallurgical process which is used to polish and whiten metal and enhance their resistance to corrosion and sanitation.

Anodizing
Custom CNC Machining Services

Enhances corrosion resistance, surface hardness and wear performance as well as providing aluminum components with vibrant color selection.

Passivation
Custom CNC Machining Services

Used on stainless steel components to cleanse them and provide corrosion resistance in medical, food grade and industrial applications.

Custom CNC Machining Services
Custom CNC Machining Services
Custom CNC Machining Services
Custom CNC Machining Services

Quality Assurance & Inspection Capabilities

Each CNC machined unit in Yicen Precision undergoes a verified inspection procedure complying with ISO 9001:2015, AS9100D and ISO 13485 standards.

Our metrology staff takes every part with prototype through to full production assurance to the defined GD&T and surface finish standards; traceable and acceptable.

Dimensional Accuracy

CMM, digital micrometers, and optical measurement system are used to check all the critical features with precision at the micron level.

GD&T & Tolerance Verification

Components pass ISO 2768-mK and ASME Y14.5 standards, providing batches with accurate form, position and profile.

Surface & Finish Testing

Surface roughness (Ra 3.2-0.8 mm) and coating thickness are checked to ensure the performance and the appearance.

Traceability & Reporting

Every order consists of material certificates (MTRs), FAI reports, and CMM data sheets to ensure full transparency of the processes.

CNC Machining Design Guidelines

By considering machining limitations during the design of your components, you enhance accuracy, minimize cost, and lead time is also enhanced. These rules assist in obtaining the best manufacturability and structural and functional integrity.

Feature

Details

Internal Hads

– Avoid sharp internal corners; CNC tools naturally create radii

– Recommended internal radius: < Ø5-6 mm diameter

– Deep pockets: Tool length should exceed tool diameter for stability

Threads & Tapped Holes

– For threads: Ø5-15 mm diameter; for depth: < Ø6 mm diameter

– For threads > Ø15 mm, depth < Ø6 mm

– Custom threads and fine-pitch threads available upon request

 For turned parts, laser marking is recommended for identification

Minimum Wall Thickness

– Metals: ≥ 0.8–1.0 mm

– Plastics: ≥ 1.2–1.5 mm

– This will reduce warping, deflection, and machining waste

Hole Size & Depth

– Minimum hole diameter: Ø1.0 mm

– Minimum depth: Ø2.0 mm depending on tool availability

– Recommended minimum depth: ≥ tool diameter to stabilize chip evacuation

– For plastic bores, easing or boring improves tolerance accuracy

Undercuts

– Supported profiles: Square, flat faces, dovetails, and custom profiles

– Specialized tools may increase machining time or cost

Heat & Burnishing

– CNC milling: Minimum Ø5 mm with Ø4 mm depth

– For turned parts: Fine finishing laser engraving is preferred

Around Over-Constraint

– Avoid parts that require excessive secondary operations

– Avoid sharp corners, unsupported, and unnecessarily complicated shapes

Size Limits & Machine Constraints

 Our machine envelopes support a wide range of part sizes across milling and turning operations. Complex geometries may require engineering review.

Milling TypeMax Size (mm)Details
3-Axis Milling700 x 400 x 300 mm– Best for flat/prismatic shapes
  – Deep pockets may require longer tools
4-Axis Milling600 x 350 x 300 mm– Ideal for multi-face features
  – Fewer setups → higher accuracy
5-Axis Milling500 x 350 x 300 mm– Best for complex surfaces & GD&T-critical parts
  – Eliminates multiple positions

Turning Type

Max Diameter

Max Length

Details

Standard Turning

Ø 300 mm

500 mm

Turning With Live Tooling

Ø 250 mm

– Supports milling, drilling & slotting in one setup

– Ideal for shafts, bushings, threaded parts

Feature

Details

Smallest Machinable Features

Min feature size: 0.020 in (0.50 mm)

Minimum Wall Thickness

Metals: ≥ 0.8–1.0 mm

Plastics: ≥ 1.2–1.5 mm

Minimum Hole Diameter

Standard drilling: ≥ 1.0 mm

 

EDM/micro drilling: ≥ 0.50 mm

Pocket Depth Guidelines

Recommended: ≤ 10x tool diameter

General Machining  

Details

General Machining Constraints

Ultra-thin features may deform during machining

Internal corners naturally form radii

Long parts may require fixtures or soft jaws

Use standard tool radii for cost efficiency

Industries We Serve

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.

CNC Machining Workflow: How We Work

Check of Engineering Review and DFM.

Before machining, we examine your CAD to check material suitability, tolerances, tool access, and manufacturability to avoid problems before machining.

CAM Programming

Accuracy, surface finish and machining efficiency of 3-axis, 4-axis, 5-axis, or turning is generated using optimized toolpaths.

Precision CNC Machining

The components are milled, turned or EDM very precisely with emphasis on tight tolerances, consistent geometry and repeatability.

CMM Inspection & Quality Control.

Dimensional checks, GD&T checks, and surface finish checks are used to verify that all the parts are within the required specifications

Post-Processing and Surface Finishing.

Depending on functional or aesthetic requirements, anodizing, polishing, bead blasting, coating or custom finishing are applied.

Final Packaging & Delivery

Components are wiped, insulated, scanned, and shipped all over the world and in complete confidentiality and securely.

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.
Custom CNC Machining Services
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.

Custom CNC Machining Services
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.

Custom CNC Machining Services
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.

Applications of CNC Machining

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.CNC machining involves the manufacture of high precision, functional parts in a wide variety of industries. The most prevalent types of applications customers search and anticipate are given below.

Housings & Enclosures

Electronics, robotics, sensor, industrial assemblies, and other electronics enclosures that demand strict dimensional control.

Mounting Components

Rigid brackets, supports, linkages and mounting frames applied in automotive, aerospace, and automation systems.

Shafts and Rotational Parts

Rigid brackets, supports, linkages and mounting frames applied in automotive, aerospace, and automation systems.

Thermal Components

Aluminum or copper heat management parts in fine geometries of fin and optimized surface areas.

Gears and Motion Mechanisms

Elements of the drive that have a high degree of alignment and smoothness of operation and engagement.

Mechanical Parts Prototypes.

Engineering validation and testing Prototypes that replicate the performance of production level.

Tooling Components

Locator blocks, base plates, inserts, soft jaws and production tooling used in machining and assembling environment.

Aerospace and Medical Components.

Components must contain rigid GD&T, material traceability, and high reliability performance.

CNC Machining Services for Precision Components

Discover our expert precision cnc machining services, where accuracy meets performance at every stage. From intricate prototypes to production-ready components, our custom cnc machining services deliver high-accuracy parts. Every cut, every contour, crafted with exceptional quality, consistency, and attention to detail.

industrial motors and components cnc machining for industrial machinery industry (1)

Resources

Frequently Asked Questions

CNC Machining FAQs

  • Do you offer post-machining services like assembly or finishing?

    Yes. Along with machining, we provide secondary operations such as part marking, thread inserts, deburring, light assembly, and surface finishing. This enables a complete end-to-end manufacturing solution under one roof, minimizing logistics and handling time.
      

  • What CNC machining processes do you offer?

    We offer complete CNC machining solutions including 3-axis, 4-axis, and 5-axis milling, CNC turning with live tooling, and EDM / wire cutting for complex profiles. This allows us to produce high-accuracy components across metals and plastics, from simple blocks to multi-surface geometries with tight tolerances.
     

  • What tolerances can you achieve?

    Our standard machining tolerances are ±0.005 in (0.127 mm) for metals and ±0.010 in (0.254 mm) for plastics. For precision-critical parts, we can achieve ±0.001 in (0.025 mm) when supported by detailed 2D drawings and GD&T specifications. All parts are measured using calibrated instruments and verified against ISO quality standards.  

  • What materials can you machine?

    We support more than 80 engineering-grade materials including aluminum, stainless steel, brass, copper, titanium, mild steel, and specialized alloys, along with plastics such as ABS, POM, Nylon, PEEK, PC, and PVC. Material selection guidance is provided during quoting to ensure the best combination of machinability, strength, and finish quality. 

  • What surface finishes do you provide?

    Available finishes include as-machined, bead blasting, anodizing (Type II/III), powder coating, brushing, polishing, electropolishing, passivation, and plating or coating options like zinc, nickel, or chrome. We recommend finishes based on part material, functional performance, and cosmetic requirements.  

  • Can you handle prototypes as well as mass production?

    Yes. We specialize in scalable production — from one-off prototypes for design validation to low- and high-volume production runs. Our automated scheduling and multi-machine capacity ensure consistent quality and predictable lead times, regardless of order size.
     

  • What file formats do you accept for quoting?

    We accept standard 3D CAD formats such as STEP (.stp), IGES (.igs), Parasolid (.x_t), and native SolidWorks files. For dimensional accuracy and tolerance verification, we also encourage submitting 2D drawings (PDF, DWG, DXF) with GD&T details. Providing clear design data helps us deliver faster, more accurate quotes.
      

  • What are your lead times for CNC machined parts

    Lead time depends on part geometry, material, and finishing requirements. Typical prototypes can be delivered within 3–7 working days, while production batches may range from 1–4 weeks. Expedited machining options are available for urgent projects.  

  • How do you ensure quality and accuracy in every part?

    Each project follows a strict QA process:

    • Engineering DFM review before machining
    • Precision CAM programming and toolpath validation
    • Machining on calibrated, multi-axis equipment
    • CMM inspection, surface finish testing, and full dimensional reports
    • Optional FAI documentation and traceability reports for regulated industries

        

  • Are there design limitations for CNC machining?

    Yes, CNC machining has certain physical constraints. Very thin walls, deep pockets, or intricate undercuts may cause tool deflection or surface vibration. Sharp internal corners will always produce small radii due to cutter geometry. During DFM analysis, our engineers recommend design adjustments to maintain strength and machinability without increasing cost.
     

  • Can I provide my own material or request a special alloy?

    Yes, we can machine supplied materials or procure specialty grades on request. Each material undergoes verification for hardness, machinability, and dimensional stability before production to ensure quality consistency and predictable performance.
     

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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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