Compression springs are the most popular and most commonly used type of springs. They are used in all aspects of our lives. They are characterized by a space between the coils called the pitch of spring. Compression springs have active coils, which transfer the stresses acting along the axis of the spring and the passive coils - usually located at the ends of the spring. Their function is to create two planes parallel to each other and perpendicular to the axis of the spring. These planes facilitate operation with other elements of the spring. Thanks to the passive coils, the operating direction of the compression spring load force is much closer to the axis of the spring. In many cases the end coils of the springs are ground to enhance this effect and increase their life span and efficiency. EN Standard 15800:2009 concerning compression springs determines the grinding method and deviations that may arise during the process.
Compression spring. With closed coil and ground ends - type 1; with closed ends - type 2; or without ends - open coils, not ground.