rodas

Rodas, in Portuguese, is the plural form of roda and refers to wheels in a general sense. The term describes circular components that rotate around an axle, support loads, and enable motion, and is used for both vehicles and many types of machinery.

In engineering, a wheel is a circular element that rotates about an axis. Its main functions are to reduce friction by allowing rolling rather than sliding, to bear and transmit loads, and to provide a mounting point for tires and other components. Wheels are often paired with an axle as a wheel and axle simple machine, which can multiply force and torque depending on the design.

History and development: The wheel is one of humanity’s most influential inventions. The potter’s wheel dates to around 3500 BCE, and wheeled vehicles appeared in the following centuries in Mesopotamia and neighboring regions. Over time wheels spread worldwide, leading to innovations such as spoke wheels, metal rims, and, in the 19th century, pneumatic tires, first developed for bicycles by John Boyd Dunlop in 1887. Modern wheels commonly use lightweight alloys or carbon fiber and are typically fitted with pneumatic tires for cars, bicycles, and many other vehicles.

Types and applications: Wheels are used on vehicles (cars, motorcycles, bicycles, carts), machinery (conveyor and roller systems), and robotics. Designs vary to optimize weight, strength, aerodynamics, and rolling resistance. Maintenance considerations include tire pressure, tread wear, bearing condition, and rim integrity.