Compared to the advantages of sliding bearings

Rolling and plain bearings, compared with the following advantages:
1. Rolling friction coefficient smaller than the sliding bearing, high transmission efficiency. General Bearing friction coefficient 0.08-0.12, while the rolling friction coefficient is only 0.001-0.005;
2. Rolling has been standardization, serialization, universal, suitable for mass production and supply, use and maintenance is very convenient;
3. Rolling bearing steel, and after heat treatment, therefore, bearing not only has high mechanical properties and long service life, but it will save manufacturing plain bearings are used in more expensive non-ferrous metals;
4. Bearing internal clearance is very small, high precision machining of parts, therefore, high running accuracy. At the same time, you can pre load method to increase the rigidity of the bearing. This is precision machinery is very important;
5. Some bearings can support radial load and axial load, therefore, can simplify the structure of bearing supports;
6. As bearing drive, high efficiency, less heat, therefore, can reduce oil consumption, lubrication maintenance more easy way; self-lubricating bearings
7. Rolling can be easily applied to any space on the orientation of the uranium.
However, all things are divided into two, and bearing also has certain shortcomings, mainly:
1. Bear the load bearing capacity than the same volume of plain bearings is much smaller, therefore, the radial bearing large size. So, under heavy load situations and requirements of the radial, small size, compact structure, the occasion requires "such as crankshaft bearings), the use of slide bearing;
2. Large rolling bearing vibration and noise, especially late particularly significant in the use, therefore, requires high precision, without Xu Youzhen moving occasion, bearing hard competent, generally used in sliding bearings better.
3. Rolling of metal shavings and other foreign bodies are particularly sensitive to foreign matter enters the bearing, it will have a larger vibration and noise intermittently, also cause early damage. In addition, the bearing impurities due to metal clips, also prone to the possibility of early damage. Even if early damage does not occur, the life of rolling bearings there are certain limits. In short, the life of rolling bearings shorter than the sliding bearing.
However, compared to rolling and sliding bearings, each with advantages and disadvantages for the possession of certain situations, so the two can not completely replace each other, and each to a certain direction, to expand their fields. However, due to the outstanding merits of rolling bearings, rather then those living on the trend. Currently, the rolling bearing has developed into a major type of mechanical application more widely.