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How to improve the life of cylindrical roller bearings

发布日期: 2019.03.22 Back to list source: Release date: 2019.03.22

In theory, the cylindrical roller bearing life is generally 20,000 ~ 80,000 hours, but the actual life depends on many factors-premature bearing failure can lead to costly equipment downtime and sometimes even more serious consequences.

Satisfactory bearing life starts with the right bearing selection. From the beginning, bearing designers have extended bearing life and equipment performance by choosing the right bearing for different applications. There are many factors to consider in this process, such as load, hardness, bearing life prediction, operating environment and so on.

Proper storage

In principle, all bearings should be stored in their original packaging before installation. They need to stay in a clean, moisture-free, relatively constant temperature environment. Rolling bearings should be kept away from dust, water and corrosive chemicals. Shaking and vibration may permanently damage the mechanical properties of the bearing, so vibration must be avoided during handling and storage.

Basically, all bearings must be stored horizontally, because some heavier bearings may be deformed due to their own weight after being left standing for a long time.

Pre-greased (or sealed) bearings require special care, as the density of the grease changes over time. In this way, when the bearing is used for the first time, there will be a certain degree of rotation noise. Therefore, the shelving time of such bearings should be controlled on a first in, first out basis.

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clean

Cleaning is very important for rolling bearings. The surface roughness of the rotating surface of the bearing ring and the rolling elements is usually 1/10 μm. Such a smooth surface is very sensitive to damage caused by contaminants. The lubricating layer between the rotating surfaces is usually 0.2 ~ 1 μm. Granular impurities larger than the particle size of the lubricant will be over-rolled by the rolling elements to generate local pressure in the bearing steel, which will eventually cause permanent material fatigue. In addition to this, the size of dust particles in the external environment can reach 10 μm, which can also cause damage to the bearing. Therefore, a clean and dust-free environment is essential for bearing storage and installation.

Suzhou Beiren Bearing Sales Co., Ltd. is a rolling mill bearing company that integrates production, sales and service. Its main products include cylindrical roller bearings, tapered roller bearings, angular contact ball bearings, backing bearings, spherical roller bearings, deep Groove ball bearings, thrust roller bearings, and customized special specifications bearings.

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