This work presents a detailed analysis of designing a Two Stage Gear Reducer using Computer Aided Design (CAD). The gear reducer will be designed in totality with the help of methodology of Total Design. The gears are a main driving device in the modern rotational machine equipments at the present time. In this work, C++ programs have been developed for the designing of a gear reducer's shafts, bearings, gears, pulleys, belts and gear reducer casing. A model of the gear reducer using Pro-E has been developed. The methods of computing both the Bending & Contact stresses on the gear teeth are...