Below are just a few spring types and what they are commonly used for
Compression Springs: 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, tapered, concave, convex or various combinations of these--are used as required by the application. While square, rectangular, or special-section wire may have to be specified, round wire is predominant in compression springs because it is readily available and adaptable to standard coiler tooling.
Extension Springs: An extension spring is designed to resist a pulling force. As the extension spring is being pulled outward, the resistance to the initial tension increases. It is the initial tension that determines the load capacity of the extension spring.
Torsion Springs: A Torsion spring is connected to other components. When these components exert force onto the spring, the spring tries to push the components back to their original position. Torsion Springs are found in many everyday products. They are used in automobile suspensions, garage door assemblies, clothes pins, and mousetraps.
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