The Best of Roller Bearings for Your Choice


The bearings are used to ensure smooth and efficient operation on machines with rotary motion. They are effective, therefore, for various applications such as automobile wheels, engines and turbines or medical equipment.

A ball bearing is a type of bearing with rolling elements that fulfills three main functions, besides facilitating the movement: it resists loads, reduces friction and allows the positioning of the moving parts of the machine.

The roller bearing are composed of rolling spheres, separated by two “tracks” or bearing rings, which serve to reduce the contact surface and friction in the moving planes. The rotation of the balls reduces the coefficient of friction when the flat surfaces rub against each other. As the contact surface between the balls and the raceways is relatively small, the ball bearings have, in view of their size, a lower load capacity than other rolling element bearings.

What Are The Different Types Of Ball Bearings And Their Applications?
Ball bearings come in a variety of shapes and can be used in multiple applications. The choice of a type of ball bearing depends on the industrial application for which it will be used, as well as the load to which it will be exposed.

The most common models are:

Angular contact bearings: designed to withstand radial and axial loads.

Axial bearings: Also called thrust bearings or thrust bearings, are designed to withstand forces applied parallel to the bearing shaft or to axial loads.
Deep groove ball bearings: ideal for supporting radial loads and low axial loads.

Linear bearings: also called linear guides, allow movement in one direction along a linear axis.

Self-aligning ball bearings: also known as spherical ball bearings or spherical roller bearings, are bearings with two sets of balls that are automatically aligned and support radial loads and low axial loads.

High speed angular contact ball bearings: another variety of high precision ball bearings. As the name implies, these high-speed bearings have been specifically developed to adapt to high-speed applications with high accuracy.

What Are The Sizes, Shapes And Materials Of The Most Used Ball Bearings?
The sizes of ball bearings vary according to their use. The thickness of the bearing also depends on the application. For example, thin-walled bearings are particularly suitable for applications where space is limited. The difference between the diameter of the raceways (inner or outer) and the thickness is minimized, which allows for compact designs.

The materials used in ball bearings depend on their application. The vast majority of ball bearings are made of steel. Other bearings can be made of stainless steel to provide better corrosion resistance. There are also hybrid ball bearings, in these cases the raceway of the inner and outer rings are filled with ceramic balls to achieve high speeds of rotation.

For many explanations in the field of appliance construction, the constructive and dimensional types of standardized bearings cannot be used due to the reduced space available for the bearing or the special technical conditions. Thus new types of bearings with a more limited use are created, non-standardized bearings that are also subject to a typing and normalization process along with the quantitative increase in production. A classification of non-standard bearings can be made in relation to working speed, namely low-speed bearings and high-speed bearings.