Rolling with the sliding bearing has the advantage compared to

Rolling and plain bearings, has the following advantages:

1. Rolling bearings friction coefficient smaller than the sliding bearing, high transmission efficiency. Average coefficient of friction bearing 0.08-0.12, and the rolling friction coefficient is only 0.001-0.005;

2. Rolling has achieved 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 life, and can save manufacturing plain bearings are used in more expensive non-ferrous metals;

4. Bearing internal clearance is small, high precision machining of parts, therefore, high running accuracy. At the same time, by pre-loading method of increasing the rigidity of the bearing. This precision machinery is very important;

5. Some bearing can support radial load and axial load, so you can simplify the bearing support structure;

6. Since rolling high transmission efficiency, less heat, therefore, can reduce oil consumption, lubrication maintenance more easy; self-lubricating bearings

7. Rolling can be easily applied to space any orientation on uranium.

However, everything is divided into two, bearing also has some drawbacks, mainly:

1. Bear the load bearing capacity than the same volume of the sliding bearing is much smaller, therefore, the radial bearing large size. So, in the case of heavy load to bear and small radial size requirements, structural requirements for compact applications <as crankshaft bearings), the use of sliding bearings;

2. Bearing vibration and noise is higher, especially in the use of late is particularly significant, therefore, demanding precision, without Xu Youzhen moving occasion, bearing difficult competent, generally used in sliding bearings better.

3. Rolling of metal shavings and other foreign matter are particularly sensitive to foreign matter enters the bearing will produce a large vibration and noise intermittently, also cause early damage. In addition, because the metal clip bearing impurities also prone to the possibility of early damage. Even early damage does not occur, the life of rolling bearings have certain limits. In short, the life of rolling bearings shorter than the sliding bearing.

However, Rolling and plain bearings, compared advantages and disadvantages of each occupy a certain application of occasions, so the two can not completely replace each other, and each to a certain direction, to expand their fields. However, due to the outstanding advantages of rolling bearings, quite latecomers trend. Currently, the rolling bearing has developed into a major mechanical type, application more widely.