Definition of screw
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Screw (n.) A cylinder, or a cylindrical perforation, having a continuous rib, called the thread, winding round it spirally at a constant inclination, so as to leave a continuous spiral groove between one turn and the next, -- used chiefly for producing, when revolved, motion or pressure in the direction of its axis, by the sliding of the threads of the cylinder in the grooves between the threads of the perforation adapted to it, the former being distinguished as the external, or male screw, or,
Lern More About Screw
Hindleys Screw ::
Hindleys screw () A screw cut on a solid whose sides are arcs of the periphery of a wheel into the teeth of which the screw is intended to work. It is named from the person who first used the form.
Wrench ::
Wrench (v. t.) An instrument, often a simple bar or lever with jaws or an angular orifice either at the end or between the ends, for exerting a twisting strain, as in turning bolts, nuts, screw taps, etc.; a screw key. Many wrenches have adjustable jaws for grasping nuts, etc., of different sizes..
Garrote ::
Garrote (n.) A Spanish mode of execution by strangulation, with an iron collar affixed to a post and tightened by a screw until life become extinct; also, the instrument by means of which the punishment is inflicted..
Tap ::
Tap (n.) A tool for forming an internal screw, as in a nut, consisting of a hardened steel male screw grooved longitudinally so as to have cutting edges..
Drill Press ::
Drill press () A machine for drilling holes in metal, the drill being pressed to the metal by the action of a screw..
Archimedean ::
Archimedean (a.) Of or pertaining to Archimedes, a celebrated Greek philosopher; constructed on the principle of Archimedes' screw; as, Archimedean drill, propeller, etc..
Bolt ::
Bolt (n.) A strong pin, of iron or other material, used to fasten or hold something in place, often having a head at one end and screw thread cut upon the other end..
Screwing ::
Screwing (p. pr. & vb. n.) of Scre.
Jack ::
"Jack (n.) A portable machine variously constructed, for exerting great pressure, or lifting or moving a heavy body through a small distance. It consists of a lever, screw, rack and pinion, hydraulic press, or any simple combination of mechanical powers, working in a compact pedestal or support and operated by a lever, crank, capstan bar, etc. The name is often given to a jackscrew, which is a kind of jack..
Screw ::
Screw (n.) An amphipod crustacean; as, the skeleton screw (Caprella). See Sand screw, under Sand..
Worm ::
Worm (n.) A short revolving screw, the threads of which drive, or are driven by, a worm wheel by gearing into its teeth or cogs. See Illust. of Worm gearing, below..
Doublethreaded ::
Doublethreaded (a.) Having two screw threads instead of one; -- said of a screw in which the pitch is equal to twice the distance between the centers of adjacent threads.
Screw ::
Screw (n.) A steam vesel propelled by a screw instead of wheels; a screw steamer; a propeller.
Unscrew ::
Unscrew (v. t.) To draw the screws from; to loose from screws; to loosen or withdraw (anything, as a screw) by turning it..
Jackscrew ::
"Jackscrew (n.) A jack in which a screw is used for lifting, or exerting pressure. See Illust. of 2d Jack, n., 5..
Washer ::
Washer (n.) A ring of metal, leather, or other material, or a perforated plate, used for various purposes, as around a bolt or screw to form a seat for the head or nut, or around a wagon axle to prevent endwise motion of the hub of the wheel and relieve friction, or in a joint to form a packing, etc..
Cramp ::
Cramp (n.) A rectangular frame, with a tightening screw, used for compressing the joints of framework, etc..
Bed Screw ::
Bed screw () A form of jack screw for lifting large bodies, and assisting in launching..
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