What are the methods of bearing installation

Installation items of bearing:
1、 Clean bearing and bearing related parts
The bearing and its associated parts need to be cleaned, while the bearing that has been lubricated with grease, the bearing with oil seal on both sides and the bearing with seal ring need not be cleaned before installation.

2、 Check the dimension and finishing of related parts
3、 Installation
During the installation of bearings, it is necessary to determine the installation method and installation plan according to the structure, size and matching properties of bearing components. The pressure shall be directly loaded on the end face of the tight fitting ferrule and cannot be transmitted through the rolling element.

1. Press fit
This kind of fitting is to make the inner ring of the bearing and the shaft tightly fit. If the outer ring and the bearing are loosely fitted, the press can be used to press fit them on the circumference, and then the pressed whole can be installed into the bearing seat hole. During the press fitting, the position is at the end face of the inner ring of the bearing, which can be padded by the assembly sleeve to avoid being pressed on the cage.
The bearing outer ring is tightly fitted with the bearing seat hole. If the inner ring is loosely fitted with the shaft, press the bearing into the bearing seat hole first. If the bearing ring is relatively tight with the shaft and seat hole, install the inner ring and outer ring and press them into the shaft and seat hole at the same time. The structure of the assembly sleeve shall be able to press the end faces of the bearing inner race and outer race at the same time.

2. Heating fit
This is mainly the method of using the principle of thermal expansion and cold contraction to install the bearing. This method is very helpful for the installation of bearings with large interference. Before hot assembly, the bearing or the separated circumferential ring shall be put into the oil tank for uniform heating. After heating to a certain degree, take out and install it on the shaft.
3. Installation of tapered hole bearing
Press in with a press or install with a general hot assembly method. For the case of taper hole, it can be directly installed on the taper shaft or installed with a sleeve. When the bearing is installed in the housing, the clearance is generally more matched, and the outer ring should have interference.

4. Installation of thrust bearing
The fit between the circumference of the thrust bearing and the shaft is generally transition fit, and the fit between the seat ring and the bearing seat hole is generally clearance fit. Therefore, this bearing is easy to install. The central shaft spring of the two-way thrust bearing should be fixed on the shaft to prevent rotation relative to the shaft.

4、 Inspection after installation of bearing
After the bearing is installed, it is necessary to check the operation of the bearing to verify whether the installation is correct.
5、 Supply lubricant
Before installation, unpack the bearing. General grease lubrication, no cleaning, directly filled with grease. Lubricating oil is used for lubrication, and ordinary bearings do not need to be cleaned. However, bearings used for instruments or high-speed bearings should be cleaned with crystalline oil to remove the rust inhibitor applied on the bearings. The bearing with the rust inhibitor removed is more likely to rust, so it cannot be left unattended. Bearings that have been put into lubricating grease cannot be directly cleaned.