Tensile spring initial tension refers to

I tried to explain "initial tension" as clearly as possible.

Initial tension refers to the force with which adjacent lines stick to each other. Imagine an experiment where you hold a hook of a tension spring (about the size of a thumb) and pull it to the left and right. You gradually apply force while pulling until a gap begins to form in the closely adhered body. If a gap forms immediately, it means the "sticking force" is weak, indicating weak initial tension. Conversely, if a gap takes a long time to form, the "sticking force" is strong, indicating strong initial tension. In this experiment, if you attach a "spring scale" to one of the hooks, you can easily measure the initial tension. The force exerted on the spring scale when a gap begins to form in the body equals the initial tension. The strength of the initial tension can be adjusted by us, the manufacturers. By changing the settings of the spring processing machine, we can wind the spring with the desired initial tension. However, the problem is that initial tension has a "suitable strength for processing." If it is too weak, the processing becomes unstable, and if it is too strong, the processing itself becomes difficult. The extent to which it can be processed strongly (or weakly) varies depending on the material, shape, and processing equipment, so I believe it is best to contact us, the manufacturers, for a shortcut.

Contract manufacturing