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jackscrew

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jackscrew: see screw screw, simple machine consisting essentially of a solid cylinder, usually of metal, around which an inclined plane winds spirally, either clockwise or counterclockwise.
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jackscrew [′jak‚skrü]
(mechanical engineering)
A jack operated by a screw mechanism. Also known as screw jack.
The screw of such a jack.
jackscrew
A jack in which a screw is used for lifting; carries a plate which bears on the load.
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However, when the jackscrew is installed under a part and clamped down, there is a tendency to bend the part with any excessive force.
Mill fixturing: easy as 1, 2, 3 by Rose, Steve / Tooling & Production
The T handle design incorporated through the top of the jackscrew makes using it a cinch, plus, for even more leverage if needed, a 5/8-inch Hex Head on top of the Jackscrew has been included to make the job even easier.
Get Er' done in the field by Beraldo, Daniel / Bowhunter
The tray is then slid into place, and two arms on a jackscrew lift the patient into position.
Stryker ambulance moves wounded out of harm's way. (News) by Army Logistician
 
 
 
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