Ball bearings are mechanical devices that serve to reduce friction between two moving objects. These devices are used in various fields, particularly in the manufacturing of vehicle gears, and they are indeed found within the car's suspension, on the brake disc, and on the wheel hub, in order to facilitate and make the vehicle's movements safer. Let's explore in detail what they are and how they work.

The belt is a mechanical transmission component used to connect two shafts in a slightly elastic but still rigid manner, using pulleys with a relatively large distance between them. They are usually made of closed rings, with or without joints, made of leather, textile fibers, and rubberized nylon threads.

A pulley is a transmission organ of motion consisting of a rotating disk around its own axis. It may optionally be equipped with one or more grooves to accommodate an equal number of ropes, cords, cables, belts, or similar items.