Common Bearing Inner Ring Fixing Methods
In order to prevent the bearing inner ring of the bearing from being displaced in radial and axial direction, the bearing inner ring needs to be fixed. The commonly used bearing inner ring fixing methods are as follows:
1. Withdrawable fixing method. One end of the bearing inner ring is placed in the groove of the shaft, and the other end is fixed on the shaft or housing by means of screws, nuts or other fastening components. This method is suitable for bearing sizes of 50mm or less.
2. Interference fitting method. The inner ring is forcibly fitted onto the shaft or housing by using the clearance between the shaft or the housing and the bore of the bearing inner ring. The interference fit is mainly divided into a light interference fit and a tight interference fit.
3. Induction-hardening press-fitting method. By means of inductor and heat generation by induction, the bearing inner ring is heated to a certain temperature and then put into the housing or pressing onto the shaft, and the bearing inner ring is press-fitted on the shaft or housing together with the medium pressure. This method is suitable for the bearing inner rings more than 30mm in diameter.
4. Shrink fitting method. The bearing inner ring is heated to a certain temperature and then installed on the shaft or housing, so that it can be fitted tightly on the shaft or housing by itself due to its own contraction. This method is suitable for all sizes of bearing inner rings.
The inner ring is an important part of the bearing and bears all the loads. In order to ensure its reliable working performance, the inner ring must be fixed properly. When selecting the inner ring fixing method, the size and tolerance of the bearing parts should be considered. In addition, the material and surface treatment of the circumferential surface of the inner ring also need to be considered. With the development of bearing production technology, there are more and more methods for bearing inner ring fixing and their adaptability is also increasing. The choice of fixing method must be consistent with production and application conditions.
In general, the common bearing inner ring fixing methods can ensure the working performance and reliability of the bearing inner ring to a certain extent. The engineers and technicians should select the most suitable fixing method according to the different bearing sizes and working conditions.
