[Markus Gritsch] built this six-wheeled robot using omni-wheels. Two wheels are used on each axis in order to ensure perpendicular rotation is possible no matter where the axis rotation stops.

The robot was built for less than $100 with the most expensive item consisting of the omni-wheels and couplings. Its creator explains a little more about its functionality and construction.

But this is very useful when you build robots or — as he shows at the start of the video — a forklift. Mecanum wheels are similar to omni wheels, but with some differences. In particular ...