Whether the bearing is installed correctly or not, the result directly affects the bearing accuracy, life and performance. Therefore, please fully study the installation method of bearings before the arrangement, and according to years of production and after-sales arrangement experience, our technical department summarizes the following points for installation and operation precautions to carry out the installation of bearings.

1. Clean bearings and related parts (except bearings with sealing rings).

2. Check the size and finishing of the relevant parts, (especially the determination of the upper and lower tolerance range of the shaft).

Bearing installation method:

1. Press in fit

When the inner ring of the bearing is a tight fit with the shaft, and the outer ring is a loose fit with the bearing seat hole, the bearing can be pressed on the shaft first by a press, and then the shaft together with the bearing is loaded into the bearing seat hole, and a soft metal assembly sleeve (copper or mild steel) is inserted on the end face of the bearing inner ring during press mounting.

When the inner ring and the shaft are loosely matched, the bearing can be pressed into the bearing seat hole first, and the outer diameter of the assembly sleeve should be slightly less than the diameter of the seat hole.

If the bearing ring is tightly matched with the shaft and seat hole, the installation of the inner ring and the outer ring should be pressed into the shaft and seat hole at the same time, and the structure of the assembly sleeve should be able to hold the end face of the inner ring and the outer ring at the same time.

2. Heat match

An installation method that uses thermal expansion to transform a tight fit into a loose fit by heating the bearing or bearing seat. It is a common and labor-saving installation method. This method is suitable for the installation of bearings with large interference. Before hot loading, put the ring of bearings or separable bearings into the oil tank for uniform heating of 80-100 ° C, and then take it out of the oil and install it on the shaft as soon as possible. In order to prevent the inner ring end face and shaft shoulder from fitting tightly after cooling, the bearings can be axially tightened after cooling. When the bearing outer ring is fitted tightly with the bearing seat made of light metal, the hot loading method of heating the bearing seat can avoid chafing the mating surface.

When heating the bearing with the oil tank, there should be a grid at a certain distance from the bottom of the tank, or use the hook to hang the bearing, the bearing can not be placed on the bottom of the tank to prevent impurities from entering the bearing or uneven heating, there must be a thermometer in the tank, strictly control the oil temperature should not exceed 100 ° C to prevent the tempering effect, so that the hardness of the ring is reduced.

3. Installation of thrust bearing

The shaft ring of the thrust bearing is generally a transitional fit with the shaft, and the match between the seat ring and the bearing seat hole is generally a clearance fit, so this bearing is easier to install, and the central shaft ring of the two-way thrust bearing should be fixed on the shaft to prevent rotation relative to the shaft.

The installation method of bearings is generally the case of shaft rotation, so the coordination of the inner ring and the shaft is an over-win coordination, and the coordination of the bearing outer ring and the bearing chamber is a clearance coordination.

Operation check after bearing installation:

After the installation of the bearing, the operation check should be carried out immediately to determine whether the installation is normal.