Compared with sliding bearings, rolling bearings have the following advantages:

Rolling bearings have achieved universality, serialization, and standardization, making them more suitable for large-scale production and supply, and are very convenient to use and maintain;

2. The friction coefficient of rolling bearings is smaller than that of sliding bearings, resulting in higher transmission efficiency. The friction coefficient of sliding bearings is generally 0.08-0.12, while the friction coefficient of rolling bearings is only 0.001-0.005;

3. Rolling bearings have high operational accuracy, with small internal clearances and high machining precision for each component. Rolling bearings can also increase their rigidity by preloading. This is very important for precision machinery;

4. Rolling bearings not only have high mechanical performance and long service life, but are also made of bearing steel and heat-treated, which can save the expensive non-ferrous metals used to manufacture sliding bearings;

5. Rolling bearings have high transmission efficiency, low heat generation, and can reduce the consumption of lubricating oil, making lubrication and maintenance more convenient;

6. Some rolling bearings can withstand both axial and radial loads simultaneously, which is beneficial for simplifying the structure of the bearing support;

7. Rolling bearings can be conveniently applied to shafts in any spatial orientation.

Compared to sliding bearings, rolling bearings also have the following disadvantages:

1. Rolling bearings have a smaller load-bearing capacity than sliding bearings of the same volume, therefore, the radial size of rolling bearings is larger. In situations where large loads need to be borne and small radial dimensions and compact structures are required (such as crankshaft bearings in internal combustion engines), sliding bearings are often used;

2. Rolling bearings have significant vibration and noise, especially in the later stages of use. Therefore, in situations where high precision is required and vibration is not allowed, sliding bearings are generally preferred;

Once foreign objects enter the rolling bearing, intermittent large vibrations and noise will be generated, which can also cause early damage. In addition, rolling bearings are also prone to early damage due to impurities in metal clamps. Even without early damage, the lifespan of rolling bearings is somewhat reduced. In short, the lifespan of rolling bearings is shorter than that of sliding bearings.

Rolling bearings and sliding bearings each have their own advantages and disadvantages, and each has a certain degree of applicability. The two cannot completely replace each other and are developing in a certain direction. At present, rolling bearings have developed into the main support type of machinery, and their applications are becoming increasingly widespread.