The usage of four-row cylindrical roller bearings in rolling mills

Dec 05, 2023

Using four-row cylindrical roller bearings in rolling mills is vital in steel rolling production. This bearing can withstand high loads and has high precision and stability, so it is widely used in rolling mills. The following will detail using four-row cylindrical roller bearings in rolling mills.

Selection of rolling mill-bearing materials

The material of rolling mill bearings has a crucial influence on their performance and service life. Common bearing materials in rolling mills include steel, stainless steel, and aluminum alloys.

Bearing steel

Bearing steel is a kind of steel specially used for manufacturing bearings. This material offers several benefits, including exceptional hardness, superior wear resistance, and remarkable fatigue resistance. It can withstand high loads and impacts and is suitable for high-speed operation and high-precision requirements. In rolling mills, bearing steel is mainly used to manufacture essential components such as four-row cylindrical roller bearings and rolling mill support rollers. Standard bearing steels include GCr15, GCr15SiMn, carburized steel, etc.

Below is the four-row cylindrical roller bearing 340RYL1963B.C2 with TIMKEN3311 material.

Stainless steel

Stainless steel is a steel material with excellent corrosion resistance and is often used to manufacture bearings in corrosive environments. It has good toughness and strength and is suitable for high-speed operation and high-temperature environments. In rolling mills, stainless steel is mainly used to make corrosion-resistant and high-temperature-resistant bearings, such as rolling, thrust, and crossed roller bearings. Standard stainless steels used to manufacture bearings include 304, 316, etc.

Aluminum alloy

Aluminum alloy is a lightweight, high-strength metal material with good thermal conductivity and processing properties. In rolling mills, aluminum alloys mainly manufacture light-load and low-speed bearings, such as rolling mill back-up roller bearing seats and support frames. Aluminum alloys have lower manufacturing costs and are widely used in cost-sensitive applications.

It should be noted that different materials have different performance characteristics and service lives, so when selecting bearing materials, comprehensive considerations need to be made based on specific application scenarios and performance requirements. At the same time, to ensure the regular operation and production safety of the bearings, the bearings also need to be installed, lubricated and maintained correctly.

Structural features of four-row cylindrical roller bearings

The four-row cylindrical roller bearing has a compact structure and strong load-bearing capacity. It comprises four rows of cylindrical rollers, raceways, cages and bearing rings. Line contact is used between the rollers and raceways, which can withstand high loads and has good impact resistance. The cage separates the rollers so that the rollers maintain a certain distance during movement to ensure the regular operation of the bearing.

Selection of four-row cylindrical roller bearings

When selecting four-row cylindrical roller bearings in rolling mills, the following factors need to be considered:

Load size: According to the design requirements of the rolling mill, select bearings that can withstand the corresponding load. Generally speaking, the greater the load, the need to choose bearings with more robust load-bearing capacity.

Speed: The rolling mill's speed also affects the bearings selection. The higher the speed, the need to choose bearings with higher precision and better stability.

Installation position: According to the structural design of the rolling mill and actual working needs, select the bearing suitable for the installation position.

Other factors: Factors such as the operating environment, lifespan, and maintenance requirements of the bearing also need to be considered.

Use of four-row cylindrical roller bearings

In rolling mills, the following points need to be noted when using four-row cylindrical roller bearings:

Installation: Correct installation of bearings is essential to ensure their regular operation. The cleanliness of the bearings needs to be ensured during installation to avoid adverse effects on the bearings caused by impurities and wear. In addition, you need to follow the instructions or the guidance of professionals for the correct installation.

Lubrication: Good lubrication can reduce friction and wear of bearings and extend their service life. In rolling mills, grease or oil is generally used to lubricate bearings. It should be noted that the type and amount of grease or lubricating oil need to be selected and controlled according to the specific use environment and requirements.

Monitoring: Real-time monitoring of the bearings is required to ensure the rolling mill's regular operation and production safety. Monitoring content includes bearing temperature, vibration, noise and other parameters. Once an abnormal situation is discovered, timely measures must be taken to deal with it.

Maintenance: Regular maintenance of bearings is an important measure to ensure their regular operation. Maintenance includes cleaning, inspection, replacement, etc. During the maintenance process, attention must be paid to protecting the accuracy and integrity of the bearings to avoid damage to the bearings.

Replacement: When the bearing reaches the end of its service life or severe failure occurs, it needs to be replaced in time. Bearings must be thoroughly inspected and analyzed before selecting the appropriate replacement model. At the same time, it is also necessary to pay attention to the operating specifications and technical requirements during the replacement process to avoid adverse effects on the bearings.

In short, four-row cylindrical roller bearings have been widely used in rolling mills, and their excellent performance and stability can meet the high requirements of steel rolling production. During use, you must pay attention to correct installation, lubrication and maintenance and strengthen monitoring to ensure regular operation and production safety. Bearings that have reached the end of their service life or have failed must be replaced in time, and appropriate replacement models must be selected to ensure the rolling mill's regular operation and production efficiency.