Frequently Asked Questions

General Questions

Q: What is Yueyi precision's main business focus?

Yueyi precision specializes in precision manufacturing solutions for global industries, including:

  • CNC machining (milling, turning, 5-axis)
  • Swiss machining for small, complex parts
  • Aluminum extrusion and custom profiles
  • Die casting (aluminum, magnesium, zinc)
  • Sheet metal fabrication and stamping
  • Full assembly and welding services

We serve demanding sectors including medical devices, automotive, robotics, semiconductor equipment, and consumer electronics.

Yueyi precision is fully certified with:

  • ISO 9001:2015 – Quality Management Systems
  • ISO 13485:2016 – Medical Devices Quality Management
  • IATF 16949:2016 – Automotive Quality Management

 

You can request a quote through several channels:
Email: Send drawings and specifications to
Direct Contact:

  • For the most accurate quote, please provide:
  • Complete 2D drawings or 3D CAD files
  • Material specifications
  • Quantity requirements
  • Any applicable standards or certifications needed

Our standard MOQ is 1 piece for prototyping and small-batch production. However, optimal pricing and lead times are achieved at:

  • CNC Machining: 50+ pieces
  • Die Casting: 1,000+ pieces
  • Aluminum Extrusion: 500+ kg
  • Sheet Metal: 100+ pieces

We specialize in both low-volume prototyping and high-volume production.

Lead times vary by process and quantity:
Process Prototype Lead Time Production Lead Time
CNC Machining 5-10 working days 15-25 working days
Swiss Machining 7-12 working days 20-30 working days
Die Casting 15-20 working days 30-45 working days
Aluminum Extrusion 10-15 working days 20-35 working days
Sheet Metal 5-8 working days 15-25 working days
Expedited services available for urgent projects

Yes, absolutely. Our engineering team provides free DFM analysis on all projects. Within 24-48 hours of receiving your drawings, we’ll provide:

  • Tolerance optimization suggestions
  • Material alternatives for cost/performance
  • Manufacturing process recommendations
  • Potential production challenges and solutions

This service has helped clients reduce manufacturing costs by up to 35% while improving part performance.

 

We process over 50+ materials across all manufacturing processes:
Metals:

  • Aluminum (6061, 6063, 7075, 5052, etc.)
  • Stainless Steel (303, 304, 316, 17-4PH, etc.)
  • Titanium (Grade 2, 5, 23)
  • Brass, Copper, Bronze
  • Alloy Steels (4140, 4340, etc.)
  • Magnesium Alloys
  • Zinc Alloys

Plastics:

  • ABS, POM (Delrin), Nylon, PC, PEEK, PTFE
  • PPS, PEI (Ultem), PSU

All materials come with full material certification and traceability.

Our standard and precision tolerances vary by process:

ProcessStandard TolerancePrecision ToleranceHigh-Precision Capability
CNC Milling±0.05 mm±0.02 mm±0.01 mm
CNC Turning±0.03 mm±0.01 mm±0.005 mm
Swiss Machining±0.01 mm±0.005 mm±0.005 mm
5-Axis Machining±0.04 mm±0.015 mm±0.008 mm
Die Casting±0.15 mm±0.08 mm±0.05 mm
Aluminum Extrusion±0.1 mm±0.05 mm±0.03 mm

We regularly achieve even tighter tolerances for medical and aerospace applications.

We offer comprehensive surface finishing options:

Mechanical Finishes:

  • Machined finishes (Ra 0.4 μm to 6.3 μm)
  • Grinding, polishing, buffing
  • Sandblasting (glass bead, aluminum oxide)

Chemical Finishes:

  • Anodizing (Type II, Type III hard coat)
  • Plating (nickel, chrome, zinc, gold)
  • Passivation (stainless steel)
  • Chemical film (Alodine, Iridite)

Paint & Coatings:

  • Powder coating (all RAL colors)
  • Wet painting (spray, dip)
  • E-coating, Dacromet

Specialty Finishes:

  • Teflon coating, ceramic coating
  • Laser marking, engraving
  • Heat treatment, case hardening

Yes, we have full in-house tooling capabilities:

  • CNC machining centers for mold and die making
  • Wire EDM and sinker EDM
  • Tool room with skilled tool and die makers
  • Mold flow analysis software
  • Tool maintenance and repair services

For die casting, we design and build all molds in-house, ensuring faster turnaround and better quality control.

Our 5-stage quality control process ensures every part meets specifications:

  • Incoming Material Inspection
  • Material certification verification
  • Chemical composition analysis
  • Mechanical property testing

First Article Inspection (FAI)
CMM verification of all features
Surface finish and hardness testing
In-Process Quality Control
Statistical Process Control (SPC)
Regular operator self-inspection
Final Inspection
Full dimensional report with each shipment
Visual inspection under controlled lighting

Our quality lab is equipped with:

Primary Measurement Equipment:

  • 3D Coordinate Measuring Machines (CMM) with 0.5 μm accuracy
  • Optical comparators with 10x-100x magnification
  • Surface roughness testers (Ra 0.01-25 μm range)
  • Roundness/cylindricity measuring instruments
  • Digital height gauges with 1 μm resolution
  • Custom inspection fixtures for high-volume parts

Yes, we provide comprehensive inspection reports with every shipment:

  • Dimensional inspection report with actual measurements
  • Material certification
  • Heat treatment certification (if applicable)
  • Surface finish measurement report
  • First Article Inspection (FAI) report
  • Certificate of Conformance (CoC)

All reports are available in digital format and can be customized to meet customer-specific requirements.

 

We work with major international carriers to provide flexible shipping options:

Express Shipping:

  • DHL, FedEx, UPS (1-3 days)
  • TNT, (2-5 days)

Air Freight:

  • Commercial airlines (5-7 days)
  • Charter flights available for urgent shipments

Sea Freight:

  • FCL (Full Container Load) and LCL (Less than Container Load)
  • Door-to-door service with customs clearance
  • 15-35 days depending on destination

Incoterms: We can ship under EXW, FOB, CIF, DDP, DAP based on your preference.

We take great care in packaging to ensure parts arrive undamaged:

Standard Packaging:

  • Anti-corrosion paper or VCI bags
  • Bubble wrap or foam protection
  • Custom-cut foam inserts for fragile parts
  • Cardboard boxes or wooden crates

Special Packaging:

  • Vacuum sealing for moisture-sensitive parts
  • ESD protection for electronic components
  • Climate-controlled packaging for extreme environments

All packages are clearly labeled with part numbers, quantities, and handling instructions.

Ready to start Your next project?

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ADDRESS

NO.22,You Yi Road ,Wulian Community, LongCheng Street ,Long gang District ,Shen Zhen

Email

icey@yueyiprecision.com