Abstract: In automobile industry reverse engineering is the processes of collecting design information from automotive parts and re-producing it or reproducing it with modification. For learning purposes reverse engineering can be used to understand the process and subsequently improve the design. In present work 3D model of old unused crank shaft is created using techniques of reverse engineering. Majority of measurements are taken with help of vernier calliper and micrometer. The critical profile is traced on graph paper X, Y coordinates are determined. The same profile is scanned on coordinate measuring machine and curves are plotted with help of ProE software. The results are compared.

Keywords: Reverse Engineering, Co-ordinate Measuring Machine, Crank Shaft, 3D model.