In mechanical engineering and industrial applications, the efficiency and longevity of machinery significantly depends on the precision of its components. Ball and roller bearings play a pivotal role in this regard, facilitating smooth motion and reducing friction within rotating machinery. The precision levels of these bearings are important, influencing the overall performance and reliability of the systems they support. To understand the significance of precision levels in ball and roller bearings, it is imperative for one to delve into the types of bearings available.