How to attach bearings on shaft

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To attach bearings to a shaft that needs to rotate 90 degrees, two slide bearings can be positioned at the top and bottom for rotation. Vertical movement can be stabilized using external circlips if there is no axial load, or by creating a shoulder on the shaft for support if axial forces are present. The middle portion of the shaft can be thicker than the ends, which may require specific fitting techniques such as press fitting or thermal expansion. Understanding the mechanics of a bicycle crank can provide useful insights for this setup. Consulting structural design books related to gearboxes can further aid in the process.
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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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