20 YEARS EXPERIENCE

YINGNAISI is a professional machining manufacturer in China, specialized in high precision steel pipe and hydraulic cylinder. We have a Professional technical team and complete management system.

ADVANCE EQUIPMENT

highly-precision cold-drawing hydraulic units, five-bar finishing mill, multiple scraping and rolling machine, multi-roll straightening machines, CNC lathes and dozens of large honing units, Vacuum cleaner, hydraulic cylinder assembling machine,testing machines.

FOCUS ON QUALITY

Our quality control process includes design review, raw material inspection, during production inspection, initial production auditing and review, random sample of early batch production.