The quality control department of Guann Yeong equip with well-found examination instruments including the 2.5 D diagraph instrument, image microscope and screw nut optics sieving machine, all-powerful material experiment machine, torque experiment machine, salt fog experiment machine …etc., examine size, machine strength and appearance of each fastener and trapping parts to ensure that the product can perform the best function and quality.

Own Japan the most advanced fixed-head & sliding-head compound automatic lather in the factory, can develop various precise hardware parts and axis product of car, electronics, medical appliances, architecture for customers.

Our quality control department will manage and control all products completely, and each batch of product all according to CNS, ASTM and JIS and the standard certification of advanced countries of Europe and America to test and examine the machine function, ensure the quality of product, and provide you the best and the most stable products.


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