The installation fitting requirements for plastic bearings are different from those for traditional metal bearings, as the characteristics of plastic materials are more special, such as lower hardness, lower rigidity, and higher expansion coefficient, etc. Therefore, special attention should be paid to the installation of plastic bearings to ensure their performance and service life. The following are some installation fitting requirements considering the characteristics of plastic bearings:

1. Cleaning and Drying

Before installation, plastic bearings need to be thoroughly cleaned to remove surface dust, oil, or other impurities. Drying is also an important aspect, as moisture may affect the performance of the plastic, even causing it to become brittle or crack.

2. Appropriate Preload

The selection of preload is very important when plastic bearings are matched with metal components. Excessive preload may cause bearing damage, while insufficient preload may not achieve the expected performance. Therefore, it is necessary to determine the appropriate preload according to the specific application scenario and specifications of the plastic bearing.

3. Appropriate Lubrication

Although plastic bearings have certain self-lubricating properties, in certain high-load or high-temperature application environments, it may be necessary to use lubricants to extend their service life. When selecting the appropriate lubricant, consideration should be given to its compatibility with plastic and its impact on bearing performance.

4. Installation Methods

　　When installing plastic bearings, it should be avoided to use hard objects for or to tighten them forcibly, as this may cause deformation or damage to the bearings. Generally, the oil-injection method or direct installation method is adopted. The oil-injection method involves pre-injecting an appropriate amount of lubricant into the bearing and then installing it on the corresponding component. The direct installation method involves lubricating the bearing after it is fully assembled.

5. Use of Appropriate Installation Tools

Using appropriate tools for installation can reduce damage to the plastic bearings. For example, using special plastic bearing installation tools can reduce the compression and deformation of the bearings during the installation process.

6. Installation Environment

When installing plastic bearings, it should be avoided to do so in high-temperature or humid environments to prevent the performance of the plastic material from being affected.

In summary, the correct installation of plastic bearings requires a comprehensive consideration of their characteristics. Measures such as selecting appropriate installation methods, preload, lubrication methods, and using appropriate installation tools are taken to ensure their normal operation in various application environments.