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

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