Mention the constant force spring, you must think of Yongsheng. Dongguan Yongsheng is a spring manufacturer which specialized in R&D and production of constant force spring. Now we have 16 years experience for spring production. High quality and timely delivery. Just like the choice of Shenghong Precision Company, Shenghong Precision Company is a manufacturer which produce precision electronic instruments, their products need a lot of constant force spring. Because it’s precision, so they request very strictly. At the beginning Shenghong Precision Company find many spring manufactures on the net,  and make samples in several companies, but the force and the working life all can not meet their requirements. Finally they decide to try again in Yongsheng constant force spring, after making and testing samples, at last, Shenghong Precision Company became a loyal customer of Yongsheng Spring.

       
 Why so many clients choose Yongsheng Spring? Because Yongsheng is a spring manufacturer which specialized in R&D of spiral spring, coil spring, etc. 16 years experience in technology research and development of spiral spring, 100% imported raw-material, and the raw-material, debug the machine, forming are all very strict, ensure high quality. The factory enforce ISO9001-14001 strictly. 8000㎡ plant, the designated supplier of world top 500 enterprises, that’s the reasons why so many factories choose Yongsheng.