Graduated Leaves

Graduated leaves are individual steel plates in a multi-leaf spring assembly that vary in length and thickness, creating a progressive spring rate. They are arranged in a stack with the longest and thickest leaf (master leaf) at the bottom and progressively shorter, thinner leaves above. This design allows the spring to handle light loads with fewer leaves engaged and heavier loads with more leaves, providing variable stiffness and improved ride comfort.

Graduated leaves work on the principle of progressive spring action. Under light loads, only the longer, thinner leaves flex, providing a softer spring rate for comfort. As load increases, shorter, thicker leaves come into contact and engage, increasing the spring rate and load-bearing capacity. This creates a non-linear force-deflection curve that adapts to varying load conditions.