Overview:

YYI Tech is a trusted manufacturer of precision CNC stainless steel parts based in China. We specialize in complex metal components that meet rigorous industrial standards. Leveraging advanced 3-, 4-, and 5-axis CNC machining technology, we deliver components with exceptional dimensional accuracy, repeatability, and corrosion resistance.

Our parts are engineered to perform in demanding environments — from aerospace assemblies to medical instrumentation.

Technical Specifications:

• Material Types:

  • SS304 – Excellent general corrosion resistance

  • SS316 – Ideal for marine and chemical applications

  • SS303/SS416 – Optimized for high-speed machining

  • Duplex Stainless – For strength-critical parts

• Machining Capabilities:

  • Tolerance: ±0.005–0.01 mm

  • Surface Roughness: Ra 0.8–3.2 µm

  • Max part size: 600mm x 600mm x 400mm

  • Minimum wall thickness: 0.5 mm

  • CNC turning, milling, threading, tapping, pocketing

• Surface Finishing:

  • Electropolishing, Passivation, Bead Blasting, Mirror Polish

  • Custom coating available on request (e.g., TiN, black oxide)

• Inspection & Certification:

  • 100% dimensional inspection

  • CMM, height gauge, thread gauge reports

  • Material certificates & RoHS/REACH compliance provided

Industries Served:

• Aerospace & UAV

• Automotive OEM & Tier-1

• Surgical & Diagnostic Medical Devices

• Semiconductor Equipment

• Industrial Automation & Robotics

Core Advantages:

• Precision Engineering – Capable of high-complexity geometry

• Confidentiality – NDA protection for all client data & designs

• Quality Control – ISO9001:2015 compliant with full traceability

• Scalability – Prototyping to 100,000+ units/month

• Efficient Production – Optimized CNC workflows for reduced lead times

Engineering FAQs

Q: What file formats do you accept?
A: STEP, IGES, DXF, DWG, STL, Parasolid (x_t/x_b)

Q: Can you help with design for manufacturability (DFM)?
A: Yes, our engineers will review and suggest optimizations before production.

Q: How do you guarantee dimensional accuracy?
A: Through in-process QC, CMM inspection, and final part validation reports.

Q: What is your lead time?
A: Typically 5–10 working days for prototypes, 15–20 for volume production.

Q: Do you provide First Article Inspection (FAI) reports?
A: Yes, upon request. PPAP documentation is also available for automotive clients.