Which type of bearings are commonly found in a vehicle's rotating parts?

Ball bearings and roller bearings are widely used in a vehicle's rotating parts due to their ability to reduce friction and handle both radial and axial loads effectively. Ball bearings consist of balls that roll between two races, allowing for smooth motion and minimal wear, making them suitable for high-speed applications in engines, transmissions, and wheels.

Roller bearings, on the other hand, use cylindrical rollers instead of balls. This design increases the surface area in contact with the raceways, allowing them to support heavier loads than ball bearings for a given size. They are particularly beneficial in applications where high radial load-carrying capacity is necessary, such as in transmissions and differential assemblies.

The combination of ball and roller bearings provides a versatile solution for different requirements throughout a vehicle, balancing load capacity, speed, and durability, which is essential in automotive engineering.