Machine Design
The resultant axial load on a bolt depends on

External load applied
Initial tension
Relative elastic yielding (springness) of the bolt and the connected member
All of these

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Machine Design
When the shaft rotates in anticlockwise direction at high speed in a bearing, it will

Move towards right of the bearing making metal to metal contact
Move towards left of the bearing making metal to metal contact
Have contact at the bottom most of the bearing
Move towards right of the bearing making no metal to metal contact

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