If you want to create an artificial crank, you can use a process of metal forming to as the forging process. In forging, a hot chunk of rolled cast iron is placed between heavy dies having the pattern of a crankshaft. The metal is squeezed into the crank's basic shape by applying extreme pressure from a forging press. The simplest crank forging dies are arranged in a single plane, which produces a crank forging that, has all the crankpins in one plane. To index the crank throws at 90 degrees, the raw forging is twisted to offset the journals in two planes to create the final raw crank blank.
You can use an improved forging process which includes forging the crank in two planes, so that all the journals are pressed into their final configuration. It eliminates the need to twist the crank to index the journals.
By using this method you get fewer internal stresses in the forging, as well as an improved grain flow in the cast iron. Crankshafts made with this type of tooling are called as non-twist forgings. Tooling for a non-twist forging is more complex and less durable than that for a simple flat forging. There is more excess material to be machined from such a blank to create a finished crankshaft. You can produce crankshafts forgings in huge volumes which are naturally gravitated to the lower cost and higher tooling life of a flat forging. These high-end non- twisted cranks can be easily used for many engines.