Why are four-row cylindrical roller bearings and thrust bearings used together on rolling mill production lines?

Nov 21, 2024

On rolling mill production lines, the use of four-row cylindrical roller bearings and thrust bearings is based on a variety of considerations. The following is a detailed analysis of this combination:

1. Characteristics and applications of four-row cylindrical roller bearings

High load capacity:Four-row cylindrical roller bearings can withstand extremely large radial loads, which makes them an ideal choice for rolling mill production lines because the rollers need to withstand huge rolling forces.

Adapt to high-speed rotation: Since the friction between the rolling elements and the ferrule ribs is very small, four-row cylindrical roller bearings are very suitable for high-speed rotation applications, which is crucial to improving the production efficiency of rolling mills.

Wear and impact resistance: Through surface hardening and carburizing steel treatment, four-row cylindrical roller bearings have improved wear and impact resistance and can maintain a long service life under harsh working conditions.

2. Characteristics and applications of thrust bearings

Thrust bearings are mainly used to bear axial loads, and their characteristics include:

Large load capacity: Thrust bearings can withstand large axial forces to ensure that the rollers remain stable in the axial direction.

Simple structure: The structure of the thrust bearing is relatively simple, which is easy to install and maintain.

3. Advantages of collocation

Comprehensive load-bearing capacity: Four-row cylindrical roller bearings mainly bear radial loads, while thrust bearings mainly bear axial loads. The combination of the two can form a complete load-bearing capacity system to ensure the stable operation of the rolling mill under complex working conditions.

Improve rolling accuracy: The addition of thrust bearings helps to reduce the shaking of the rollers in the axial direction, thereby improving the dimensional accuracy of the rolled products.

Extend service life: The wear resistance and impact resistance of the four-row cylindrical roller bearings and the stable load-bearing of the thrust bearings jointly extend the service life of the bearings on the rolling mill production line.

Easy to maintain: Both are standardized bearing products, which are easy to install, disassemble and maintain, reducing the downtime and maintenance costs of the rolling mill.

In summary, the combination of four-row cylindrical roller bearings and thrust bearings has significant advantages on the rolling mill production line, which can meet the basic performance requirements of the rolling mill for heavy load, high speed, high precision and impact resistance.