Problems come below if levers and lock rotate many times when use.
According to EN standard and ANSI standard, higher cycle times means higher quality and long-life use.
However the spring is the most important element.
There is a tension testing to find out which Material may be the best choice to be a spring.
According to our experiment, in daily use, 65Mn steel is the economic choice for spring. But for more strict use, high tensile steel should be substitution.
Vansko is a profassional OEM hardware factory, with a strict and professional attitude to provide you with high quality products and services
We hope to work with you to make better products for our customers.