This study introduces a novel generating process for the fabrication of screw rotors utilizing an internal cylindrical skiving cutter. The continous conjugate of the proposed machining process between the cutter’s cutting edges and the screw rotor surfaces offers the potential for significant reductions in both machining time and dimensional inaccuracies. To ensure a positive clearance angle during the machining operation, an internal barrel rotor, fully conjugated with the screw rotors, is employed to define the cutting plane of the cutter. Furthermore, the cutting edge, precisely matched to the geometric profile of the screw rotor surfaces, is generated to produce flank faces free from manufacturing errors.