These are three normal gears

Normally, three gears connected to each other will rotate like the ones above. The first and last gears will rotate in the same direction, while the middle gear will rotate in the opposite direction.

However, it is possible to create three connected gears that are deceptive. Why? They all rotate in the same direction.

Paradoxical Gear Set

And what’s going on with this cube gear?

Cube Gear

Gear animation is from Robives>>