A compression spring is an open-coil helical spring that offers resistance to a compressive force applied axially. It is usually coiled as a constant-diameter cylinder. Other common forms of compression springs--such as conical or various combinations of these--are used as required by the application.

While square, rectangular, or special-section wire can be specified, round wire is predominantly used in compressed coil springs because it is readily available and adaptable to standard coiler tooling.

Shakti Spring specializes in the design and manufacturing of custom compression springs and heavy duty coil springs.

The illustration of spring dimensions below is recommended as a guide in specifying heavy duty compression springs. The functional characteristics of spring design should be given as mandatory specifications. Secondary characteristics, which may well be useful for reference, should be identified as advisory data. This practice controls the essential requirements while providing as much design flexibility as possible to the spring manufacturer in meeting these requirements.