crankshaft is the main component of the engine which converts liner motion into rotational motion. It also provides continuous rotationary motion by storing the energy. It is difficult to design a crankshaft. Just watch my crankshaft designing video on youtube. You can check tutorial of crankshaft in my tutorial section and also can download the model from my download section.

So "design" is, "modeling"? While that is essential to the design process, it is not "design". How did you arrive at the pin diameters? What forces does the crank exhibit? These are the "design" constraints. Anything short of that, is simply CAD modeling, which is fine.. but if your aim is to provide design expertise, I'd think you'd delve into the actual design process.
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