Prop shaft dampers are used to reduce or eliminate overlying rotational vibration that is transferred from the motor to the drive shaft. For the design of a prop shaft damper, the first step is to find an appropriate installation location on the drive shaft or to adapt the design to the existing installation situation. However, the drive shaft absorber should generally be located as close as possible to the origin of the vibration problem, in order to allow the use of an absorber which weighs as little as possible. Generally, a rotational vibration absorber always consists of a hub, an elastomeric element and an inertia ring. For cost reasons, it is recommended to use sheet metal parts for the hub and cast iron for the inertia rings.