What are the installation methods of deep groove ball bearings?

Press fit method:

1. The inner ring of the bearing is tightly matched with the shaft. When the outer ring and the bearing housing hole are loosely matched, the bearing can be press-fitted on the shaft first, and then the shaft is fitted into the bearing housing hole together with the bearing. On the end face of the bearing inner ring, a mounting sleeve (copper or mild steel) made of soft metal material is used.

2. The outer ring of the bearing is closely matched with the hole of the bearing seat. When the inner ring and the shaft are loosely fitted, the bearing is first pressed into the hole of the bearing seat. At this time, the outer diameter of the assembling sleeve should be slightly smaller than the diameter of the seat hole.

3. If the bearing ring and the shaft and the seat hole are tightly fitted, the inner ring and the outer ring should be pressed into the shaft and the seat hole at the same time. The structure of the assembly sleeve should be able to simultaneously press the inner ring and the outer ring of the bearing. End face.

Heating method:

It is a common and labor-saving installation method by heating the bearing or the bearing housing and using the thermal expansion to transform the tight fit into a loose fit. This method is suitable for the installation of bearings with large interference. Before the hot assembly, put the bearing or the ferrule of the separable bearing into the fuel tank and heat it evenly at 80-100 °C, then take it out of the oil and load it on the shaft as soon as possible. After the cooling is prevented, the inner ring end face and the shoulder are not tightly attached, and the bearing can be axially fastened after cooling. This method can avoid the surface of the mating surface being scratched.

When heating the bearing with the fuel tank, there should be a grid at a certain distance from the bottom of the box, or the bearing should be hung with a hook. The bearing should not be placed on the bottom of the box to prevent impurities from entering the bearing or uneven heating. There should be a thermometer in the fuel tank, strictly controlled. The oil temperature must not exceed 100 ° C to prevent tempering and reduce the hardness of the ferrule.
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