Power screw | machine component | Britannica (original) (raw)

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  In screw
  …and motion are known as power screws. A screwjack converts torque (turning moment) to thrust. The thrust (usually to lift a heavy object) is created by turning the screw in a stationary nut. By using a long bar to turn the screw, a small force at the end of the…
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• 
  In simple machine: The screw
  …and motion are known as power screws. A screw jack converts torque (turning moment) to thrust. The thrust (usually to lift a heavy object) is created by turning the screw in a stationary nut. By using a long bar to turn the screw, a small force at the end of…
  Read More