Inadequate lubrication is a critical factor in the failure of four-row cylindrical roller bearings. Insufficient lubrication may cause fretting, wear, and eventually, complete failure of the bearing. When the bearing is not lubricated properly, the rollers or balls can begin to slide instead of roll, producing heat and increasing friction. This can lead to overheating and eventually, material fatigue. To avoid this issue, you need to ensure that the bearing is lubricated correctly; check the lubricant type and quantity, apply it evenly, and maintain the proper oil viscosity. Oiling should be done regularly, keeping in mind the speed and load of the bearing.
Contamination is another major cause of four-row cylindrical roller bearing failure. Dirt, dust, and other pollutants can enter the bearing during operation, causing raceway damage or abrasion. The contamination of the lubricant can also cause failure; it can reduce the efficiency of the lubricant, increase wear, and generate unnecessary heat. To avoid this issue, you should take steps to keep the bearing and its environment clean, maintain the proper oil seals, and regularly replace lubricants. Before installing or operating the bearing, make sure that the work environment is free of contamination.
Misalignment is a common problem seen with four-row cylindrical roller bearings. Misalignment can cause significant stress on the bearing rollers, leading to uneven wear and potentially accelerating the wear process. In some cases, the bearing may even lock up. Misalignment can be caused by various factors such as poor mounting surfaces, shaft deflection, or housing deformation. To avoid this issue, you should ensure that the bearing is installed correctly, use appropriate mounting tools and techniques, and avoid applying excessive load onto the bearing. Design your system for the proper clearance needed to allow for potential misalignment.