This document discusses the design optimization and new product development of a hub idler gear. It begins with an introduction to new product development and its importance. It then reviews the manufacturing processes used to create the hub idler gear, including turning, milling, grinding and marking. The document compares the original design of the hub idler gear to the new optimized design using finite element analysis to evaluate stress, displacement, and strain. The analysis found an 8.76% reduction in stress, 14% reduction in displacement, and 4% reduction in strain in the new design compared to the original. The document concludes the optimized design of the hub idler gear could potentially replace the original design.