Bearing: an important component that supports rotation

With the increasing development of mechanical manufacturing technology, the number of mechanical equipment is increasing and the scope of use is also becoming more and more extensive. In these mechanical equipment, bearings are important components that support rotation. It reduces the friction between mechanical movements, resulting in higher mechanical energy efficiency and longer service life. In this article, I will provide a detailed introduction to the working principle and types of bearings.

Bearing: an important component that supports rotation

Working principle of bearings

Bearings are widely used as support components in mechanical manufacturing and industrial fields. It supports the movement of rotating components by reducing the friction between mechanical motion and motion. The friction force here refers to the resistance generated during the movement process, which can reduce the efficiency of mechanical energy and cause wear on mechanical components, affecting the service life of the machine.

Bearings can support both radial and axial motion. The basic components of bearings include inner and outer rings, rolling elements, cages, and sealing components. The inner and outer rings are the main structure of the bearing, while the rolling element is responsible for carrying weight. The function of the cage is to limit and guide the direction of motion of the rolling element, thereby ensuring the accuracy and durability of the bearing. Seals are used to protect the interior of bearings from contamination and extend their service life.

Working principle of bearings


According to the structural type of bearings, they can be classified into two types: rolling bearings and sliding bearings.

Rolling bearing is a type of bearing that uses a rolling element as a support component and can bear heavy loads and high speeds. For example, ball bearings, tapered roller bearings, barrel roller bearings, etc. all belong to rolling bearings. Among them, ball bearings are suitable for environments with small axial and radial loads; Tapered roller bearings are suitable for bearing large axial and radial loads; Barrel roller bearings are widely used in heavy-duty, low-speed, and vibration environments.

Sliding bearings are bearings that operate in a sliding manner, suitable for mechanical equipment with low loads and speeds, such as crank shafts, pendulum shafts, etc. Generally speaking, lubricating oil is very important for the operation of sliding bearings, which can reduce bearing wear and improve their service life.

In addition, according to the different uses of bearings, they can also be divided into Deep Groove Ball Bearing, self-aligning bearings, angular contact bearings, bearing units and other types. For example, Deep Groove Ball Bearing are widely used in motors, car hubs, bicycles, etc. Self aligning bearings are suitable for a large number of polarization, imbalance and vibration environments, and angular contact bearings are commonly used in high-speed combination machines.


Bearings are an important component of mechanical equipment. It supports the normal operation of rotating components by reducing the friction between mechanical movements, improving the energy efficiency and service life of the machinery. According to the working principle and types of bearings, different bearings can be selected to cope with different mechanical environments and requirements.

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