This paper studies the development of the generator application for obtaining the optimum dimension parameter and 3D engineering drawing of an Archimedes Screw Turbine Shaft. Its generator consists of two sub-systems, namely (i) the sub-system as an estimator of the optimum AST dimension parameter values and (ii) the sub-system as a 3D engineering drawing generator of the screw turbine shaft. The dimensional estimator has an algorithm to determine the optimum dimensions of the AST parameters based on Rorres method, hence the maximum volume bucket of screw blade is obtained. It is for achieving high power conversion efficiency. The second sub-system is a part that automatically utilizes the information output of the AST dimension parameter values in 3D engineering drawings using the Solidwork feature. Several data inputs for the Estimator are (i) river hydraulic power data as the value of head and water flow rate, and (ii) machining facility and material availability as the value of inner radius and blade number parameters. Simulation performance tests have been done with several different inputs of hydraulic power parameters. The Performance result test showed that the dimensional estimator sub-system is capable for determining outer radius (Ro), pitch, number of pitches, and other AST dimension parameters. The generator sub-system is capable for generating the 3D engineering drawing of Archimedes screw turbine. In addition, the raw material requirements for shafts and screw blades were also obtained.