Machine Design
When a belt drive is transmitting maximum power,

Driving tension on tight side is twice the centrifugal tension
Effective tension is equal to centrifugal tension
Driving tension on slack side is equal to centrifugal tension
Effective tension is half of centrifugal tension

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Machine Design
Cold working

Increases the fatigue strength
Has no influence on fatigue strength
Alone has no influence on fatigue strength
Decreases the fatigue strength

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