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Qu'est-ce (qui) est jackscrew$41252$ - définition
Jackscrew
![In the 19th century, the [[Raising of Chicago]] involved entire city blocks being lifted with jackscrews.](https://commons.wikimedia.org/wiki/Special:FilePath/Briggs house.jpg?width=200 "In the 19th century, the [[Raising of Chicago]] involved entire city blocks being lifted with jackscrews.")
![A [[leadscrew]] operates this automotive scissor jack.](https://commons.wikimedia.org/wiki/Special:FilePath/Jackscrew.gif?width=200 "A [[leadscrew]] operates this automotive scissor jack.")
![An electronics module mounted on the back of a large [[electrical connector]] incorporating two very long T-handle jackscrews](https://commons.wikimedia.org/wiki/Special:FilePath/PDP-5 4k by 12 bit core.jpg?width=200 "An electronics module mounted on the back of a large [[electrical connector]] incorporating two very long T-handle jackscrews")
MECHANICAL LIFTING DEVICE OPERATED BY TURNING A LEADSCREW
Screw jack; Jack-screw; Jack screw; Screw jacks; Jackscrews
A jackscrew, or screw jack, is a type of jack that is operated by turning a leadscrew. It is commonly used to lift moderately and heavy weights, such as vehicles; to raise and lower the horizontal stabilizers of aircraft; and as adjustable supports for heavy loads, such as the foundations of houses.
screw jack
MECHANICAL LIFTING DEVICE OPERATED BY TURNING A LEADSCREW
Screw jack; Jack-screw; Jack screw; Screw jacks; Jackscrews
¦ noun a vehicle jack worked by a screw device.
Jackscrew
MECHANICAL LIFTING DEVICE OPERATED BY TURNING A LEADSCREW
Screw jack; Jack-screw; Jack screw; Screw jacks; Jackscrews
·noun A jack in which a screw is used for lifting, or exerting pressure. ·see ·Illust. of 2d Jack, ·noun, 5.
