The unbalance shaft is mainly used in shakeout units and shakeout grids. The unbalance shafts consists of a robust shaft having centrifugal weights attached to its ends. While stationary, the working torque can be modified by additional centrifugal weights, or by adjusting the outer the centrifugal weight disk. This consequently alters the strength of the unbalance, and the oscillation amplitude of the driven vibratory equipment. The unbalance shaft is connected to the three-phase motor via a power train.