Axial parallelism

Axial parallelism means that two or more things are lined up in a straight line and running parallel to each other like train tracks. It's like you are stacking blocks on top of each other, making sure they are perfectly aligned one on top of the other.

In terms of machines, like engines or metalworking machines, axial parallelism is really important because it ensures that different parts of the machine are lined up correctly so the machine runs smoothly and doesn't get damaged.

Think of it like this: If you have a toy train track, and the tracks are not parallel, the train will wobble and could even derail. Similarly, if parts of the machine are not parallel, they might rub together and cause damage or the machine might not work as well.

So, axial parallelism makes sure that everything is in a straight line and running “parallel” so that everything works smoothly and efficiently!