Which bearing combination should be used for high-speed wire mill rolls?

Jul 17, 2024

During the metal rolling process, high-speed wire mill rolls are subjected to extremely high speeds, heavy loads, and precise positioning requirements. In order to ensure the stable operation of the mill, improve rolling efficiency, and extend the service life of the equipment, it is particularly important to choose the right bearing type. Among the many types of bearings, double-row cylindrical roller bearings are widely used in high-speed wire mill rolls due to their high load capacity, stability, and long life, and angular contact ball bearings are widely used in high-speed wire mill rolls due to their high precision, high rigidity, and high-speed performance. The article will discuss in detail the application of double-row cylindrical roller bearings and paired angular contact ball bearings on high-speed wire mill rolls.

Characteristics and application of double-row cylindrical roller bearings

Double-row cylindrical roller bearings are a type of bearing that can withstand large radial and axial loads. Its structural feature is that there are two rows of rollers on the inner and outer rings, and each row of rollers forms a line contact with the inner and outer ring raceways, thereby achieving a higher load capacity. At the same time, double-row cylindrical roller bearings also have the advantages of compact structure, low friction resistance, and smooth operation. They are particularly suitable for high-speed and heavy-load rolling environments.

In high-speed wire mills, double-row cylindrical roller bearings are usually installed on both sides of the rolls to withstand the huge radial force and part of the axial force generated during the rolling process. Since the double-row cylindrical roller bearings have a large number of rollers, their load-bearing capacity and stability are relatively high, which can ensure that the rolls can maintain stable operation during high-speed rotation. In addition, the line contact between the rolling element and the raceway of the double-row cylindrical roller bearing also gives it a long service life.

The above picture is a double-row cylindrical roller bearing produced by FV.

Characteristics and application of angular contact ball bearings

Angular contact ball bearings are high-precision, high-rigidity bearing whose rolling element is spherical and forms point contact with the inner and outer ring raceways. Angular contact ball bearings can withstand radial loads and certain axial loads while also having high-speed performance and high rotation accuracy. In high-speed wire mills, angular contact ball bearings are usually used as paired bearings and used together with double-row cylindrical roller bearings to meet the high-precision positioning requirements of the rolls during high-speed rotation.

The advantages of angular contact ball bearings are their high precision and high rigidity. During high-speed rotation, the rolling element of the angular contact ball bearing can form a stable oil film between the inner and outer ring raceways, thereby reducing friction and wear and increasing the service life of the bearing. At the same time, since the rolling element and raceway of the angular contact ball bearing are in point contact, its rotation accuracy is high, which can meet the high-precision positioning requirements of the roller during high-speed rotation.

Angular contact ball bearing 7028 BGM

The use of double-row cylindrical roller bearings and angular contact ball bearings

On the rollers of high-speed wire mills, the use of double-row cylindrical roller bearings and angular contact ball bearings can achieve better performance. Specifically, double-row cylindrical roller bearings mainly bear radial loads and part of the axial load to ensure the stable operation of the rollers during high-speed rotation. In contrast, angular contact ball bearings mainly bear axial loads to improve the positioning accuracy and rotation accuracy of the rollers. This combination can give full play to the advantages of the two bearings and achieve stable and efficient operation of the mill.

In practical applications, the selection of double-row cylindrical roller bearings and angular contact ball bearings should be comprehensively considered based on the specific working conditions of the mill, rolling process, and bearing load capacity, accuracy, and life. At the same time, during the installation, commissioning, and maintenance of the bearings, it is also need to follow the relevant requirements and specifications to ensure the normal rotation of the bearings and extend their service life.

In summary, the application of double-row cylindrical roller bearings and angular contact ball bearings on the rollers of high-speed wire mills has significant advantages. The high load capacity, stability, and long life of double-row cylindrical roller bearings can ensure the stable operation of the rollers during high-speed rotation. In contrast, the high precision, high rigidity, and high-speed performance of angular contact ball bearings can meet the high-precision positioning requirements of the rollers during high-speed rotation. Through the coordinated use of these two bearings, the stable and efficient operation of high-speed wire mills can be achieved, and the rolling efficiency and product quality can be improved.