Assembly consists of cast metal base and cover into which a pair of Rubber-to-metal bonded flexible units are sandwiched in an angular disposition. These are load in a combination of shear and compression for longest life and best load-deflection characteristics. They can not become solid and rendered ineffective.
Mountings are stiffer in the transverse direction as compared to flexibility in the horizontal direction. Mountings can be oriented to obtain greater flexibility in the required direction. When three or more mountings are arranged symmetrically around a vertical axis, the flexibility of the suspension is the same in all direction.