Three common problems and solutions for equal-section thin-walled bearings

Thin-walled bearings of equal section are also called thin-walled ferrule bearings, which have high precision, very quiet and strong carrying capacity. Thin-walled ferrule bearings can be deep groove ball bearings, four-point contact bearings, angular contact ball bearings, thin-walled and other cross-section bearings are mostly square. In these series, even with larger shaft diameters and bearing bores, the cross section remains the same. These bearings are therefore referred to as equal sections. It is this feature that distinguishes thin-walled ferrule bearings in the standard ISO series from conventional bearings. Therefore, a larger cross section can be selected and a more load bearing bearing can be used without having to change the shaft diameter. Thin-walled ferrule bearings can be designed to be extremely light and require very little space.

In recent years, the market demand for thin-walled bearings of equal section has been increasing steadily, and the momentum is good. However, a large number of products of different brands have enriched the market, and the quality of products is uneven. There are many problems in the use of consumers. Bearings provide some solutions for everyone, I hope to be useful to everyone.

1. Why does the sealing performance of equal-section bearings decrease?

The phenomenon is: large friction torque; poor performance against dust, dust and the like.

The reason is as follows: the bearing structure is special: the wall is thin, the volume is small, the weight is light, the sealing space is small, the rigidity is poor, and the deformation is easy. It is difficult to improve the hot working, cold working and inspection of bearing parts including seals, and it is difficult to improve the machining accuracy. At present, this type of sealing structure on the market has the same size, and the sealing performance is not good or the friction torque is large due to the processing error, which cannot meet the requirements of the bearing.

Solution: In order to meet the sealing requirements of the bearing, the friction torque requirement, combined with the machining accuracy of the bearing parts and the dimensional tolerances, and the machining accuracy of the sealing ring, according to the limited bearing space, the structural dimensions of the sealing ring are individually designed to make up The machining accuracy error of bearing parts and seals achieves the expected results and meets the requirements of users.

2. Why is there a problem with grease leakage in equal-section sealed bearings?

The phenomenon is that the grease inside the bearing overflows from its sealing lip.

The reason is that the bearing structure is special in size, the sealing space is small in size, and the rationality of the sealing structure is limited.

Solution: Select a reasonable process, through a number of process tests, under the premise of meeting the requirements of use, to prevent leakage of sealed bearings.

3. Why is there a jamming phenomenon when the bearing rotates?

The phenomenon is that when the bearing is subjected to axial force or radial force, the feeling of the hand is sometimes large and the resistance is not smooth. Vibration and noise occur when rotating at high speed or at high speed.

The reason is that the bearing is not clean, there is dirt on the working surface or the working surface is rough and damaged.

Solution: Select the appropriate cleaning solution and cleaning method, strictly control the quality of the working surface, improve the inspection method, and ensure that the bearing is clean and free of foreign matter.