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The matters needing attention in bearing assembly should have the following points

wallpapers Tech 2021-04-14
The bearing should be cleaned before installation. When installing, use a special tool to press the auxiliary bearing straight into it. Don't hit with a hammer. In particular, direct impact on bearings is prohibited. When the bearing seat ring and the seat hole fit loose, the seat hole should be repaired or the bearing should be replaced.
 
Do not use a pitting or copper pad on the bearing mating surface. When removing the bearing, use the appropriate puller to pull the bearing out. Do not hit the bearing with a chisel or hammer.
When the inner ring of the bearing is tightly fitted to the shaft and the outer ring is tightly fitted to the bearing seat hole, the bearing can be pressed and fitted to the shaft by the press, and then the shaft and the bearing are installed in the bearing seat hole.
 
The end face of the bearing inner ring is provided with an assembly sleeve made of a soft metal material (copper or mild carbon steel). The inner diameter of the assembly bushing should be slightly larger than the journal diameter and the outer diameter should be slightly smaller than the ribs of the bearing inner ring to avoid pressing into the cage. The outer ring of the bearing is closely fitted with the bearing seat hole. When the inner ring and shaft are loose and installed, the bearing can be pressed into the bearing seat hole first. At this point, the outer diameter of the assembly sleeve should be slightly less than the diameter of the seat hole. If the bearing ring fits closely with the shaft and the seat hole, the inner and outer rings must be installed in the shaft and the seat hole at the same time.
 
This method is suitable for the installation of large interference bearings. Before thermal assembly, the bearing or detachable bearing ring is put into the oil tank, heated evenly at 80-100℃, and then removed from the oil and installed on the shaft as soon as possible. In order to prevent the end face of the inner ring from not fitting closely with the shaft shoulder after cooling, the bearing can be tightened axially after cooling. When the outer ring of the bearing is closely matched with the light metal bearing seat, the thermal assembly method of heating the bearing seat can be adopted to avoid scratching on the matching surface. There must be a thermometer in the oil tank. Strictly control the oil temperature not more than 100℃ to prevent tampering and reduce the hardness of the sleeve.

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