Machine Design
The centrifugal tension in belts

Increases the belt tension without increasing power transmission
Increase the wrap angle
Increases the power transmitted
Decreases the power transmitted

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Machine Design
Machine screws are

Similar to stud
Used to prevent relative motion between two parts
Slotted for a screw driver and generally used with a nut
Similar to small size tap bolts except that a greater variety of shapes of heads are available

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