Oil-free Bearing Installation Precautions

- Jun 23, 2019-

1. It should be determined whether there are any injuries, protrusions, etc. on the mating surfaces of the shaft core and the shaft shell. If it is necessary to remove it with oil grindstone or fine sandpaper.

2. Confirm if dust or mold sand is attached to the surface of the bearing shell.

3. In order to avoid bumps during loading, a small amount of lubricating oil should be applied to the surface of the shaft and shaft housing. To install the bearing on the shaft, apply force to the inner ring. When mounting the bearing to the bearing housing, apply force to the outer ring. When applying force on the bearing, be careful to make the force vertical and even down. If you hit the bearing, the bearing will be injured. Try to avoid partial hitting.

Oil-free Bearing Installation Precautions

4, the oil-free bearing retainer and the sealing plate must not be forced. The method of installing the hammer and the bushing is a commonly used method, because the bearing will be damaged, so do not hit it directly. The sleeve should be tapped in the middle and the hammer should be tapped lightly. In the mechanical construction, when the inner and outer rings are tightly fitted, the pad should be used, so that the force can be applied to the inner and outer rings at the same time. If only the inner ring is pressed in, the force will be pressed into the outer ring by the ball, so it will cause scratches on the track surface.

5. When a bearing with a large margin is mounted on a shaft, a method of heating the bearing to 80-90 degrees in a clean oil and expanding the inner diameter is widely used. Considering that the hardness of the bearing will be reduced due to overheating, it must not exceed 100 degrees. At this time, the bearing must be suspended by wire, or placed on the wire and support plate, and should not be placed at the bottom of the groove. When the bearing reaches the desired temperature (below 100 degrees), it should be taken out of the groove immediately and quickly put into the shaft. The bearing will shrink with the temperature drop. Sometimes there will be a gap between the shoulder and the end face of the bearing. Therefore, it is necessary Use a tool to press the bearing in the axial direction.

This oil-free bearing installation instruction is equivalent to a part of the oil-free bearing product specification, and it is also necessary for us to understand, in order to better use and protect oil-free bearings. And our neglect can damage the bearing and affect the service life of the bearing.