Description
The wheel was a ring or round disk with a rod (the axle) running through its center or hub. Wheels were made of wood and sometimes partly of metal. They could be a solid piece of wood (see the illustrations at Cart, wagon) or a central hub connected by several spokes to an outer rim. The axle normally extended from one side of the vehicle to the other side, with a wheel attached to each end of the axle.
Translation

While most languages will have a word for “axle,” NAB renders SIR 33:5 accurately without reference to this piece on which the wheel turns: “Like the wheel of a cart is the mind of a fool; his thoughts revolve in circles.”