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.

Tolerance Table for Assembly Services

Assembly Type Fit Type Tolerance Range (mm) Typical Application
Press Fit / Interference Fit Tight Fit ±0.005 to ±0.01 Bearings, dowel pins, structural joints
Slip Fit / Clearance Fit Loose Fit ±0.02 to ±0.05 Shafts, pulleys, components requiring movement
Alignment Assemblies Precision Fit ±0.01 to ±0.02 Optical housings, sensors, precision stages
Threaded Assembly Standard Tapped Fit Class 2B (±0.13 for M6) Fastener mating parts, mechanical assemblies
Welded/Bonded Assembly General Fabrication ±0.1 to ±0.2 Frames, panels, enclosures
Modular/Stacked Assemblies High Repeatability ±0.01 to ±0.03 Automation equipment, tooling fixtures
Mechanical Sub-assemblies Functional Fit ±0.02 to ±0.1 Gearboxes, valves, housings
Electronic/PCB Assemblies Close Fit ±0.05 to ±0.1 PCB mounting holes, component placement

Surface Finishing for Assembly Services

At Yicen Precision, our assembly services ensure your multi-component projects are expertly put together, tested, and ready for deployment.

Deburring
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Removes sharp edges and burrs created during cutting to improve safety and provide a clean, finished look.

Bead Blasting
cnc aluminum anodizing

 Uses high-pressure blasting with fine media to create a smooth, matte surface. Ideal for achieving a uniform finish and removing minor imperfections.

Chemical Cleaning (Pickling)
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Removes oxidation, scale, and surface contaminants to restore and prepare metal surfaces after cutting.

Brushing
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 Applies a uniform, subtle texture using abrasive brushes for an attractive and tactile surface.

Polishing
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Mechanically smooths surfaces to achieve a high-gloss, reflective finish—ideal for decorative or consumer-facing parts.

Tumbling
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Smooths and rounds edges of small parts by vibrating them with abrasive media, improving finish and handling safety.

Powder Coating
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Applies a durable, protective coating that improves corrosion resistance and allows for various color options. Perfect for functional and aesthetic applications.

Anodizing
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 Adds a corrosion-resistant oxide layer to aluminum parts and enables a range of color options for both protection and aesthetics.

CNC Machining Services
CNC Machining Services
CNC Machining Services
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.

Materials for Assembly Services

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.

6061
7075
5052

303
304
316
17-4 PH

1018
140
4340

C110
C360

POM (Delrin)
Nylon
PTFE
PEEK

ABS
Acrylic
Polycarbonate

G10/FR4
Carbon Fiber

Silicone
Neoprene
Nitrile

Titanium
Inconel
Ceramics

Advanced Assembly Equipment

What Are The Assembly ServiceCustom Mechanical & Electromechanical Assembly Servicess?

Our mechanical assembly services and electromechanical assembly services are designed to deliver complete, production-ready units with exacting standards. From bracket installations and threaded fastening to wiring integration and sealing processes, we assemble complex systems with high accuracy and repeatability. Perfect for industries requiring dependable fit, finish, and functionality across every batch.

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.

Our Streamlined Ordering Process

Upload Your Design

Easily upload your CAD files through our secure online platform to get started.

Customize Your Requirements

Choose your material, finish, tolerances, and preferred lead time to match your project needs.

Get an Instant Quote

Receive a real-time quote based on your design and selected specifications, no delays.

Production & Delivery

Your parts are manufactured by trusted partners, quality-checked, and delivered to your door on time.

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.
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.

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.

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.

High-Quality Mechanical Assembly Services for Complex Systems

Streamline production with our professional mechanical assembly services, delivering complete, ready-to-install units built with precision and consistency. From sub-assemblies to complex multi-part systems, our custom assembly services ensure perfect alignment, reliable performance, and exceptional build quality.

Turnkey Product & Sub-Assembly Services for Manufacturers

Yicen Precision provides product assembly services and sub-assembly services that support everything from prototypes to full-scale production. By combining CNC machining, finishing, and assembly under one roof, we streamline workflows, reduce lead times, and ensure consistent quality. Ideal for ready-to-use assemblies, mechanical units, enclosures, and multi-part engineered components.

Assembly Line Operations, assembly services

How Assembly Services Work (Step-by-Step)

Modern contract assembly services rely on advanced automation, high-precision machining, and strict quality control to produce ready-to-use components with exceptional reliability.

1. Component Preparation & Verification

All incoming components—machined, fabricated, or sourced—are inspected for dimensional accuracy to ensure proper fit during assembly. This includes checking tolerances for interference fit assembly, clearance fit assembly, and alignment-critical parts.

2. CNC Machining & Finishing Integration

Parts requiring additional milling, drilling, tapping, or finishing undergo precise CNC machining and assembly preparation. This guarantees compatibility and seamless integration during the assembly stages.

3. Mechanical & Electromechanical Assembly

Assemblies are built using techniques such as:

  • Threaded assembly
  • Press-fit / interference fit assembly
  • Alignment assemblies
    Welded assembly
    Ensuring structural integrity and functional precision for industrial applications.

4. Robotic & Automated Assembly Systems

For high-volume or repetitive tasks, robotic assembly systems are deployed for fast, consistent, and error-free production. Automated tooling enables precise fastening, joining, labeling, and sub-component placement.

5. Cleanroom or Controlled Environment Assembly (If Required)

Sensitive components for electronics, aerospace, or medical devices are assembled in controlled environments using cleanroom procedures to prevent contamination and ensure long-term reliability.

6. Quality Testing & Functional Verification

Every assembly undergoes rigorous inspections such as:

  • Dimensional checks
  • Torque & pressure testing
  • Circuit testing (for electromechanical assemblies)
  • Operational performance validation

Nothing moves forward until it passes strict QC standards.

Benefits of Professional Assembly Services

Choosing advanced assembly outsourcing for manufacturers delivers multiple advantages across production, speed, and quality.

Reduced Lead Times

By combining machining, fabrication, and assembly in one facility, we eliminate multi-vendor delays, accelerating production by up to 40%.

High-Precision Finished Components

With CNC integration and automated inspection, all assemblies maintain consistent tolerances, perfect alignment, and functional accuracy.

Scalable Production Capacity

Whether you need a prototype assembly service, short runs, or production assembly service for thousands of units, our systems scale without compromising quality.

Fully Ready-to-Use Assemblies

Products leave our facility fully assembled, tested, and ready for installation or distribution, significantly reducing your downstream workload.

Cost Savings Through Consolidation

Outsourcing assembly reduces labor costs, eliminates additional vendors, and streamlines logistics, saving manufacturers time and capital.

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.

Connect With Us

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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Get In Touch With Us!
Prompt response guaranteed within 12 hours
🔐 All uploads are secure and confidential