Long Taper Springs
Full Taper Springs are usually used on heavy duty trucks and trailers. Full Taper Springs typically have anywhere between 1 to 4 leaves that differ in thickness, but the length of the leaves is approximately the same. The main purpose of full Taper Spring is to act as a cushion between the axle and chassis, to protect the vehicle and cargo.
The major design goals of full Taper Springs are it reduces spring stiffness; reduce inter-leaf friction and reducing spring weight.
By tapering each leaf in the full Taper Spring the load or stress is spread out evenly along the entire length of the leaf. In fact, each leaf acts as a separate spring.