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Related Concept Videos

Self-Locking Screw01:16

Self-Locking Screw

A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. One of the key features that can make a screw jack more effective and reliable is its self-locking capability.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
Frictional Forces on Screws01:17

Frictional Forces on Screws

Screws are characterized by a helical ridge known as a thread wrapped around a cylindrical shaft. They are commonly used as fasteners to hold objects together or to transmit power and motion in machines. One type of screw that is particularly useful for transmitting power is the square-threaded screw.
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...

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Related Experiment Video

Updated: Jun 21, 2026

A Mini-Invasive Internal Fixation Technique for Studying Immobilization-Induced Knee Flexion Contracture in Rats
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A radiolucent retractor for locking screws

N D Riley1, C K Sivaji

  • 1Department of Trauma and Orthopaedic Surgery, Southend University Hospital NHS Trust, Westcliff-on-Sea, Essex, UK. ndriley@googlemail.com

Annals of the Royal College of Surgeons of England
|July 25, 2009
PubMed
Summary

No abstract available in PubMed .

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