Machine Design
The connecting rod bolts are tightened up so that tightening stress

Is 50% of yield point
Approaches yield point
Is just sufficient to hold parts together
Is about yield point divided by safety factor

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Machine Design
An open belt drive is used when

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

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