Machine Design
Oldham coupling is used to connect two shafts

Whose axes intersect at a small angle
Which have lateral misalignment
Which are perfectly aligned
Which are not in exact alignment

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Machine Design
A bolt

Is provided with pointed threads
Has both the ends threaded
Has head at one end and other end fits into a tapped hole in the other part to be joined
Has a head on one end and a nut fitted to the other

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