Machine Design
A fast and loose pulley drive is used when

Shafts are arranged parallel and rotate in the same directions
Shafts are arranged at right angles and rotate in one definite direction
Shafts are arranged parallel and rotate in the opposite directions
Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft

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Machine Design
Coaxing is the procedure of increasing

Metal strength by cycling
Metal hardness by surface treatment
Fatigue limit by over-stressing the metal by successively increasing loadings
Metal resistance to corrosion by coating

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