How to attach bearings on shaft

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SUMMARY

This discussion focuses on the proper attachment of bearings to a shaft that needs to rotate 90 degrees in both directions. The recommended approach includes using two slide bearings positioned at the top and bottom of the shaft to facilitate rotation. For vertical stability, it is essential to consider the use of external circlips if there is no axial load, or to implement a shoulder on the shaft to support the bearings if axial forces are present. Additionally, techniques such as press fitting or thermal expansion can be utilized for securing the bearings.

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  • Knowledge of axial loads and bearing support mechanisms
  • Familiarity with press fitting and thermal expansion techniques
  • Basic concepts of mechanical design and shaft construction
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Blad9
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I have a shaft, which I would like to rotate 90 degrees to one side and then 90 degrees back to the other side and so forth. How should I attach the bearings to this shaft? I was thinking to do it as shown in this image:
wl4tj9.jpg

Two slide bearings, one on the top and one on the bottom so the shaft can rotate. But how should I fix this movement vertically? I’m completely new to attaching bearings on shafts, so any help would be appreciated. It does not necessarily have to be done as shown in the image.
 
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The shaft at the middle portion can be thicker in diameter than the top and bottom portion.
 
cktoh said:
The shaft at the middle portion can be thicker in diameter than the top and bottom portion.
Yes, true. Didn't think about that. But how should I realize that?
 
If there is no axial load, you can use external circlips
 
if there is a load, perhaps you could look at the workings of a crank on a bicycle. Are you attaching anything to each end of the shaft? some shafts are frozen (reduced in size) then feed into the bearing and gradually heated to create a mate through expansion of metal, or you can have them press fitted.

Hope this helps.

Dunk
 
if you need the shaft bears axial force, the shaft must have a shoulder, one bearing leans against the shoulder, it can support whole shaft.
i suggest you refer to some books show a few structure inside gear box, it is useful for you.
 

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