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What issues need to be paid attention to when installing bearings?

May 28, 2024
The installation of bearings is very important during the use of bearings and is a key factor in determining the service life of bearings. When installing bearings, you need to pay attention to the following key issues to ensure correct installation and long-term stable operation of the bearings:

1. Cleanliness:

Before installing the bearing, ensure that the bearing and installation environment are clean. Any tiny impurities, dust or foreign objects can affect the performance of the bearing or cause damage.

Use a clean cloth or paper to wipe the bearings and mounts, avoiding cloth or gauze whose fibers may shed.

2. Installation accuracy:

Make sure the bearing mounting (housing, shaft, etc.) has the correct size and geometry. Any mismatch or deviation may cause the bearing to be installed incorrectly or operate erratically.

Use proper tools and techniques to ensure the bearing is properly pressed or installed on the shaft.

3. Lubrication:

Before installing the bearing, make sure that the inside of the bearing has been filled with an appropriate amount of lubricant (such as grease or oil). This helps reduce friction and wear and extends bearing life.

During installation, avoid excessive or insufficient lubricant, as well as the wrong type of lubricant.

4. Bearing arrangement:

If multiple bearings need to be installed, make sure they are installed in the correct order and arrangement. Improper alignment can cause the bearings to be subject to uneven loading or overheating.

5. Inspection of mating surfaces:

Check the bearing's mating surface (such as journal, bearing seat hole, etc.) for burrs, scratches or rust. These defects can cause bearings to be installed incorrectly or be damaged.

If defects are found on the mating surface, tools such as a whetstone or file should be used to trim them and ensure that the surface is flat and smooth.

6.Installation direction:

Make sure the bearings are installed in the correct direction. For example, some bearings have specific mounting directions, such as bearings with oil grooves or oil holes.

7. Installation intensity:

Use appropriate mounting force to install the bearing. Too much force may cause bearing damage, while too little force may result in loose installation.

Use professional installation tools or equipment, such as a press or hydraulic installation tool, to ensure an even and appropriate installation force.

8. Preload:

For bearings that require preloading (such as tapered roller bearings), ensure that the preloading force is appropriate. Excessive preload will cause premature bearing damage, while insufficient preload may cause the bearing to operate erratically.

9. Fixing method:

Choose the appropriate fixing method according to the type and purpose of the bearing. For example, some bearings require locking nuts, retaining rings, or dowel pins to secure them.

10. Inspection and testing:

After installation is complete, perform necessary inspections and tests on the bearings to ensure they are installed correctly and operating properly. This includes checking bearings for rotational flexibility, noise and vibration levels, etc.

Following the above precautions can ensure correct installation and long-term stable operation of the bearings.

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