Please avoid the following improper usage methods
⑴ Use beyond maximum compression capacity
Under the condition of 300000 cycles, the use of tight and long connectors can cause damage due to pressure. When used close to tight and long connectors, the spring wire will gradually become tight. As the fixed number of the spring increases, the load curve will also rise, resulting in high stress and causing the spring to break. Please do not use it for more than 300000 cycles.
⑵ Use without preloading
Due to gaps, the spring vibrates up and down, causing it to twist. If preloaded, the spring remains relatively stable.
⑶ Spring horizontal use
When the spring is used horizontally, it can cause wear and breakage of the guide pin and spring.
⑷ Use without spring guidance
When used without spring guidance, it is easy to cause distortion at the bottom and body of the spring, and the local high pressure at the twisted part is the main cause of spring fracture. Please be sure to use inner diameter guide pins or outer diameter guide devices.
When the flatness of the assembly surface is poor
When the parallelism of the assembly surface is poor, it can cause spring distortion, local high pressure fracture, and when the parallelism is poor, it can cause spring distortion and spring fracture after more than 300000 cycles of use. Please improve the parallelism of the assembly surface under the condition of no more than 300000 cycles of use.
Regarding the inner diameter of the spring and the guide pin
If the gap between the guide pin is too small, it will cause collision wear on the inner diameter, and the worn part is the main cause of spring fracture; On the contrary, if the gap is too large, it will cause the spring to twist and break. The optimal gap is around -1.0mm in the inner diameter of the spring. For springs with longer free length (free length/outer diameter greater than 4), please use steps or guide pins to avoid collision with the guide pins when the spring body is twisted.
⑺ Spring outer diameter and countersunk hole
If the gap between the countersunk hole and the spring is too small, the compression of the spring may cause the outer side to expand and friction with the countersunk hole, resulting in force concentration and fracture. The optimal countersunk hole diameter is the outer diameter of the spring+1.5mm. For springs with longer free length, please use the shape of the countersunk hole.
When the length of the guide pin and the depth of the countersunk hole are relatively short
If the guide pin is too short, it will cause wear and tear between the guide pin head and the spring, resulting in breakage. The ideal length of the guide pin is set to be more than half of the spring length, and please chamfer C3.
Change or use
When using a spring, the spring is twisted due to force, causing the inner ring spring to insert into the outer ring (or the outer ring to insert into the inner ring), resulting in fracture.
The use of spring series connection
When used in series, it causes the spring to bend and exceed the length of the guide pin or countersunk hole, resulting in a fracture of the same cause, as well as a slight difference in the load capacity of the spring itself causing the weaker load to bear a greater compression surface fracture.
When using debris or foreign objects mixed in
The inclusion of foreign objects can cause the effective roll to be ineffective and only compress other parts, resulting in a decrease in the actual number of effective rolls and high stress and fracture near the surface. Do not include foreign objects in the spring.