Under normal circumstances, the bearing and shaft and bearing housing can be used together, I wonder if you know, bearing interference fit assembly is how to use? Some people will ask: "Interference fit assembly is not refers to the shaft or shaft sleeve parts into the hole, the shaft or shaft sleeve with the hole size is slightly larger than the hole? Will the bearings still work well? Below small make up according to understand, answer everyone's doubts.
1. Why does the bearing adopt interference fit assembly?
When the load on the bearing is rotated relative to the ring, that is, when the radial load's direction is unchanged, the ring rotates. Or the ring is stationary, but when the load is rotating around the ring, the position of the bearing load on the mating surface will be deformed in contact, and at the same time, a gap will be generated in its opposite position. Thus, the circumference of the inner part of the mating surface and the outer part will be inconsistent, and the inner part will slip within the inner diameter surface of the outer part. This slip is slow and is commonly referred to as creep. After creep, due to poor lubrication of the mating surface and the ploughing effect of abrasive particles, serious wear will occur on the mating surface, resulting in poor rotation of the bearing, heating or internal wear of the bearing, and finally bearing damage. In order to prevent this phenomenon, interference fit should be adopted so that the mating surface does not have clearance. In addition, when the ring needs to be positioned strictly, the interference fit should also be used.
Ii. Advantages of interference fit
1, the connection is strong, fastening degree can exceed the key connection and pin connection.
2. Interference connection reduces the number of parts and simplifies the mechanical structure.
Because of the above advantages, the interference fit is suitable for connections that can withstand impact loads and are not often disassembled.