1. Avoid applications that exceed the maximum compression. The pressure will cause breakage and close to long use. This will make the wire of the hardware spring gradually close, so the higher the fixed number of the hardware spring will cause the load curve to follow It will cause the spring to break at this time, so it cannot be used more than 300,000 times.

2. The up and down vibration of the hardware spring is caused by the gap, which causes the spring to be twisted. If it is preloaded, the hardware spring will be relatively stable.

3. If the hardware spring is used horizontally, it will cause the guide pin and spring to wear and possibly break.

4. If it is used under hardware spring guidance, it is very easy to cause the bottom of the spring and the body to be twisted. The local high pressure of the twisted part is an important reason for the spring to break, so use the inner diameter guide pin or the outer diameter guide And other devices.

5. Poor parallelism of the assembly surface will cause the spring to twist, local high-pressure fractures, and poor parallelism will cause the spring to twist and use more than 300,000 times to cause the spring to break. Can not improve the parallelism of the assembly surface under the condition of more than 300,000 times of use.

6. When the gap between the guide pin and the guide pin is very small, it will cause the collision and wear of the inner diameter. The wear part is an important reason for the fracture of the hardware spring. On the contrary, if the gap is too large, it will easily cause the hardware spring to twist and break. The space is about -1.0mm in the inner diameter of the spring. And springs with longer free lengths (free length/outer diameter greater than 4), please use step or guide pins to avoid collisions with the guide pins when the spring body is twisted