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

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

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Machine Design
Pitch point of a cam is

Any point on the pitch curve
A point on the pitch curve having minimum pressure angle
Any point on the pitch circle
A point on the pitch curve having maximum pressure angle

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Machine Design
In replacing the V-belts, a complete set of new belts is used instead of replacing a single damaged belt because

Belts are available in sets
New and old belts will cause vibrations
The new belt will carry more than its share and result in short life
Only one belt cannot be fitted with other used belts

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