A library of parameterized Squirrel Cage Induction Machine models has been constructed regarding the rotor slot design and is used to investigate the influences of the rotor bars shape on the machine characteristics. The slot shapes chosen correspond to standard induction machines used for specific applications. The calculations were conducted using the Finite Element Model (FEM) of the machine and the torque and current waveforms against speed, as well as the field distribution and the copper losses in the rotor bars for every model at starting have been obtained. Useful conclusions about the influences of the slot design on the Induction Machine behavior, mainly at starting are derived.