For the computing term "WORM drive", see write once read many. For linear screw, see leadscrew.
Worm and worm wheel
A worm drive is a gear arrangement in which a worm (which is a gear in the form of a screw) meshes with a worm wheel (which is similar in appearance to a spur gear). The two elements are also called the worm screw and worm gear. The terminology is often confused by imprecise use of the term worm gear to refer to the worm, the worm wheel, or the worm drive as a unit.
The worm drive or "endless screw" was invented by either Archytas of Tarentum, Apollonius of Perga, or Archimedes, the last one being the most probable author.[1] The worm drive later appeared in the Indian subcontinent, for use in roller cotton gins, during the Delhi Sultanate in the thirteenth or fourteenth centuries.[2]
^Witold Rybczynski, One good turn : a natural history of the screwdriver and the screw. London, 2000. Page 139.
^Irfan Habib, Economic History of Medieval India, 1200–1500, page 53, Pearson Education
A wormdrive is a gear arrangement in which a worm (which is a gear in the form of a screw) meshes with a worm wheel (which is similar in appearance to...
deleted or modified. This way, the WORM helps to preserve the authenticity and safety of recorded data. WORMdrives preceded the invention of the CD-R...
driveshaft. In a worm-drive saw, the blade is driven by a perpendicularly mounted motor using worm gears, which give higher torque. The worm-drive portable circular...
height of the Greek and Roman Empires. Slewing drives function with standard worm technology, in which the worm on the horizontal shaft acts as the driver...
first portable circular saw. This saw's invention also spurred the use of wormdrive gearing, a dual-field motor, and die-cast aluminum motor housing. In 1937...
control, a wormdrive may be used. A worm wheel is fixed to the rotating platform and meshes with a worm in the base. Rotation of the worm via a manual...
1896 (ABA) to manufacture these worm gear clamps. Other names for the worm gear hose clamp include wormdrive clamp, worm gear clips, clamps, band clamps...
genericised brand name for a wormdrive hose clamp, a type of band clamp, consisting of a circular metal band or strip combined with a worm gear fixed to one end...
are easy to clean and cost between $250 – US$300. These sprayers have a worm-drive pump like Utiform Quattro or Master that pumps the plaster up to a spray...
that built America,” the Model 77 set the industry standard for handheld worm-drive circular saws which remains in production almost unchanged today. In an...
A computer worm is a standalone malware computer program that replicates itself in order to spread to other computers. It often uses a computer network...
and worm gearing. The central plane of a worm gear is perpendicular to the gear axis and contains the common perpendicular of the gear and worm axes...
of the TT has a wormdrive and crown wheel, unlike the Model T's crown wheel and pinion. The worm is located at the end of the drive shaft and above the...
axis from the crown wheel axis, the lower the mechanical efficiency. Wormdrive List of gear nomenclature Offset (gears) Wikimedia Commons has media related...
and patented a reliable wormdrive into a differential mounted on the back axle. Another feature of that period was spring drive, a torsional shock absorber...
more like a sextant, with a single pivot arm replacing the linear screw wormdrive which set the height of the object. The primary benefit of this development...
timeline of computer viruses and worms presents a chronological timeline of noteworthy computer viruses, computer worms, Trojan horses, similar malware...
A Model TT is easily identifiable by the cylindrical housing for the worm-drive over the axle differential. All gears are vanadium steel running in an...
longitudinal crankshaft orientation, necessitating a wormdrive to turn the axis of rotation of the drive to the transmission by 90°. The transmission was...
Ruport decided to keep the ship's worm-drive off-line while the gravity generator is being worked on. Disabling the worm-drive significantly reduced the speed...
errors in the tracking performance, such as periodic error caused by the wormdrive that makes the telescope move. In new observatory designs, equatorial...
typically use a wormdrive with a partial worm wheel fixed to the underside of the stage platform meshing with a worm in the base. The worm may be rotated...
fittings.: 71 The rubber sleeves are typically secured with stainless steel wormdrive clamping bands, which compress the rubber to make a tight seal around...
Stuxnet is a malicious computer worm first uncovered in 2010 and thought to have been in development since at least 2005. Stuxnet targets supervisory control...
generator can be implemented by backdriving a DC electric motor, however a wormdrive works only in one direction. Example: A CNC vertical mill has a vertical...
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