Table of Contents
200 relations: Aerospace, Aluminium, Angular frequency, Antikythera mechanism, Archimedes, Aristotle, Astrarium of Giovanni Dondi dall'Orologio, Astrolabe, Astronomy, Automatic transmission, Axle, Backlash (engineering), Belt (mechanical), Bevel gear, Blanking and piercing, Broaching (metalworking), Bronze, Cast iron, Chain, China, Citroën Type A, Clock, Cog (ship), Composite material, Cone, Congruence, Conical surface, Continuously variable transmission, Conveyor belt, Coprime integers, Cotton gin, Crank (mechanism), Crown gear, Cycloid gear, Cycloidal drive, Derek J. de Solla Price, Die casting, Differential (mechanical device), Dimension, Drive shaft, Drivetrain, Dutch language, Eclipse, Electromagnetism, Engineering plastic, Escapement, Fillet (mechanics), Fluid coupling, Flywheel, Force, ... Expand index (150 more) »
Aerospace
Aerospace is a term used to collectively refer to the atmosphere and outer space.
Aluminium
Aluminium (Aluminum in North American English) is a chemical element; it has symbol Al and atomic number 13.
Angular frequency
In physics, angular frequency (symbol ω), also called angular speed and angular rate, is a scalar measure of the angle rate (the angle per unit time) or the temporal rate of change of the phase argument of a sinusoidal waveform or sine function (for example, in oscillations and waves).
See Gear and Angular frequency
Antikythera mechanism
The Antikythera mechanism is an Ancient Greek hand-powered orrery (model of the Solar System), described as the oldest known example of an analogue computer used to predict astronomical positions and eclipses decades in advance.
See Gear and Antikythera mechanism
Archimedes
Archimedes of Syracuse was an Ancient Greek mathematician, physicist, engineer, astronomer, and inventor from the ancient city of Syracuse in Sicily.
Aristotle
Aristotle (Ἀριστοτέλης Aristotélēs; 384–322 BC) was an Ancient Greek philosopher and polymath.
Astrarium of Giovanni Dondi dall'Orologio
The Astrarium of Giovanni Dondi dall'Orologio was a complex astronomical clock built between 1348 and 1364 in Padova, Italy, by the doctor and clock-maker Giovanni Dondi dall'Orologio.
See Gear and Astrarium of Giovanni Dondi dall'Orologio
Astrolabe
An astrolabe (ἀστρολάβος,; ٱلأَسْطُرلاب; ستارهیاب) is an astronomical instrument dating to ancient times.
Astronomy
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos.
Automatic transmission
An automatic transmission (sometimes abbreviated AT) is a multi-speed transmission used in motor vehicles that does not require any input from the driver to change forward gears under normal driving conditions.
See Gear and Automatic transmission
Axle
An axle or axletree is a central shaft for a rotating wheel or gear.
See Gear and Axle
Backlash (engineering)
In mechanical engineering, backlash, sometimes called lash, play, or slop, is a clearance or lost motion in a mechanism caused by gaps between the parts. Gear and backlash (engineering) are gears.
See Gear and Backlash (engineering)
Belt (mechanical)
A belt is a loop of flexible material used to link two or more rotating shafts mechanically, most often parallel.
See Gear and Belt (mechanical)
Bevel gear
Bevel gears are gears where the axes of the two shafts intersect and the tooth-bearing faces of the gears themselves are conically shaped. Gear and Bevel gear are gears.
Blanking and piercing
Blanking and piercing are shearing processes in which a punch and die are used to produce parts from coil or sheet stock.
See Gear and Blanking and piercing
Broaching (metalworking)
Broaching is a machining process that uses a toothed tool, called a broach, to remove material.
See Gear and Broaching (metalworking)
Bronze
Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (including aluminium, manganese, nickel, or zinc) and sometimes non-metals, such as phosphorus, or metalloids, such as arsenic or silicon.
See Gear and Bronze
Cast iron
Cast iron is a class of iron–carbon alloys with a carbon content of more than 2% and silicon content around 1–3%.
Chain
A chain is a serial assembly of connected pieces, called links, typically made of metal, with an overall character similar to that of a rope in that it is flexible and curved in compression but linear, rigid, and load-bearing in tension.
See Gear and Chain
China
China, officially the People's Republic of China (PRC), is a country in East Asia.
See Gear and China
Citroën Type A
The Citroën Type A was produced from June 1919 to December 1921 in Paris, France.
Clock
A clock or chronometer is a device that measures and displays time.
See Gear and Clock
Cog (ship)
A cog was a type of ship that was used during the Middle Ages, mostly for trade and transport but also in war.
Composite material
A composite material (also called a composition material or shortened to composite, which is the common name) is a material which is produced from two or more constituent materials.
See Gear and Composite material
Cone
A cone is a three-dimensional geometric shape that tapers smoothly from a flat base (frequently, though not necessarily, circular) to a point called the apex or vertex.
See Gear and Cone
Congruence
Congruence may refer to.
Conical surface
In geometry, a conical surface is a three-dimensional surface formed from the union of lines that pass through a fixed point and a space curve.
Continuously variable transmission
A continuously variable transmission (CVT) is an automated transmission that can change through a continuous range of gear ratios.
See Gear and Continuously variable transmission
Conveyor belt
A conveyor belt is the carrying medium of a belt conveyor system (often shortened to belt conveyor).
Coprime integers
In number theory, two integers and are coprime, relatively prime or mutually prime if the only positive integer that is a divisor of both of them is 1.
Cotton gin
A cotton gin—meaning "cotton engine"—is a machine that quickly and easily separates cotton fibers from their seeds, enabling much greater productivity than manual cotton separation.
Crank (mechanism)
A crank is an arm attached at a right angle to a rotating shaft by which circular motion is imparted to or received from the shaft.
See Gear and Crank (mechanism)
Crown gear
A crown gear (also known as a face gear or a contrate gear) is a gear which has teeth that project at right angles to the face of the wheel. Gear and crown gear are gears.
Cycloid gear
A cycloidal gear is a toothed gear with a cycloidal profile. Gear and cycloid gear are gears.
Cycloidal drive
A cycloidal drive or cycloidal speed reducer is a mechanism for reducing the speed of an input shaft by a certain ratio. Gear and cycloidal drive are gears.
Derek J. de Solla Price
Derek John de Solla Price (22 January 1922 – 3 September 1983) was a British physicist, historian of science, and information scientist.
See Gear and Derek J. de Solla Price
Die casting
Die casting is a metal casting process that is characterized by forcing molten metal under high pressure into a mold cavity.
Differential (mechanical device)
A differential is a gear train with three drive shafts that has the property that the rotational speed of one shaft is the average of the speeds of the others. Gear and differential (mechanical device) are gears.
See Gear and Differential (mechanical device)
Dimension
In physics and mathematics, the dimension of a mathematical space (or object) is informally defined as the minimum number of coordinates needed to specify any point within it.
Drive shaft
A drive shaft, driveshaft, driving shaft, tailshaft (Australian English), propeller shaft (prop shaft), or Cardan shaft (after Girolamo Cardano) is a component for transmitting mechanical power, torque, and rotation, usually used to connect other components of a drivetrain that cannot be connected directly because of distance or the need to allow for relative movement between them.
Drivetrain
A drivetrain (also frequently spelled as drive train or sometimes drive-train) or transmission system, is the group of components that deliver mechanical power from the prime mover to the driven components.
Dutch language
Dutch (Nederlands.) is a West Germanic language, spoken by about 25 million people as a first language and 5 million as a second language and is the third most spoken Germanic language.
Eclipse
An eclipse is an astronomical event which occurs when an astronomical object or spacecraft is temporarily obscured, by passing into the shadow of another body or by having another body pass between it and the viewer.
See Gear and Eclipse
Electromagnetism
In physics, electromagnetism is an interaction that occurs between particles with electric charge via electromagnetic fields.
Engineering plastic
Engineering plastics are a group of plastic materials that have better mechanical or thermal properties than the more widely used commodity plastics (such as polystyrene, polyvinyl chloride, polypropylene and polyethylene).
See Gear and Engineering plastic
Escapement
An escapement is a mechanical linkage in mechanical watches and clocks that gives impulses to the timekeeping element and periodically releases the gear train to move forward, advancing the clock's hands.
Fillet (mechanics)
In mechanical engineering, a fillet is a rounding of an interior or exterior corner of a part.
See Gear and Fillet (mechanics)
Fluid coupling
A fluid coupling or hydraulic coupling is a hydrodynamic or 'hydrokinetic' device used to transmit rotating mechanical power.
Flywheel
A flywheel is a mechanical device that uses the conservation of angular momentum to store rotational energy, a form of kinetic energy proportional to the product of its moment of inertia and the square of its rotational speed.
Force
A force is an influence that can cause an object to change its velocity, i.e., to accelerate, meaning a change in speed or direction, unless counterbalanced by other forces.
See Gear and Force
Frequency
Frequency (symbol f), most often measured in hertz (symbol: Hz), is the number of occurrences of a repeating event per unit of time.
Friction
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. Gear and Friction are Tribology.
Friction drive
A friction drive in the Merriam-Webster Dictionary online.
Friction motor
A friction motor is a simple mechanism to propel toy cars, trucks, trains, action figures and similar toys.
Frustum
In geometry, a morsel; (frusta or frustums) is the portion of a solid (normally a pyramid or a cone) that lies between two parallel planes cutting the solid.
See Gear and Frustum
Gear
A gear or gearwheel is a rotating machine part typically used to transmit rotational motion and/or torque by means of a series of teeth that engage with compatible teeth of another gear or other part. Gear and gear are gears and Tribology.
See Gear and Gear
Gear cutting
Gear cutting is any machining process for creating a gear. Gear and gear cutting are gears.
Gear manufacturing
Gear manufacturing refers to the making of gears. Gear and gear manufacturing are gears.
See Gear and Gear manufacturing
Gear shaping
Gear shaping is a machining process for creating teeth on a gear using a cutter. Gear and gear shaping are gears.
Gear train
A gear train or gear set is a machine element of a mechanical system formed by mounting two or more gears on a frame such that the teeth of the gears engage. Gear and gear train are gears.
Geneva drive
The Geneva drive or Geneva mechanism is a gear mechanism that translates a continuous rotation movement into intermittent rotary motion. Gear and Geneva drive are gears.
German language
German (Standard High German: Deutsch) is a West Germanic language in the Indo-European language family, mainly spoken in Western and Central Europe. It is the most widely spoken and official or co-official language in Germany, Austria, Switzerland, Liechtenstein, and the Italian province of South Tyrol.
Giovanni Dondi dall'Orologio
Giovanni Dondi dall'Orologio (c. 1330 – 1388), also known as Giovanni de' Dondi, was an Italian physician, astronomer and mechanical engineer in Padua, now in Italy.
See Gear and Giovanni Dondi dall'Orologio
Greatest common divisor
In mathematics, the greatest common divisor (GCD) of two or more integers, which are not all zero, is the largest positive integer that divides each of the integers.
See Gear and Greatest common divisor
Gristmill
A gristmill (also: grist mill, corn mill, flour mill, feed mill or feedmill) grinds cereal grain into flour and middlings.
Heat treating
Heat treating (or heat treatment) is a group of industrial, thermal and metalworking processes used to alter the physical, and sometimes chemical, properties of a material.
Helix
A helix is a shape like a cylindrical coil spring or the thread of a machine screw.
See Gear and Helix
Hermetic seal
A hermetic seal is any type of sealing that makes a given object airtight (preventing the passage of air, oxygen, or other gases).
Hero of Alexandria
Hero of Alexandria (Ἥρων ὁ Ἀλεξανδρεύς,, also known as Heron of Alexandria; probably 1st or 2nd century AD) was a Greek mathematician and engineer who was active in Alexandria in Egypt during the Roman era.
See Gear and Hero of Alexandria
Herringbone gear
A herringbone gear, a specific type of double helical gear, is a side-to-side, rather than face-to-face, combination of two helical gears of opposite hands. Gear and herringbone gear are gears.
Hobbing
Hobbing is a machining process for gear cutting, cutting splines, and cutting sprockets using a hobbing machine, a specialized milling machine. Gear and hobbing are gears.
See Gear and Hobbing
Hyperboloid
In geometry, a hyperboloid of revolution, sometimes called a circular hyperboloid, is the surface generated by rotating a hyperbola around one of its principal axes.
Imperial units
The imperial system of units, imperial system or imperial units (also known as British Imperial or Exchequer Standards of 1826) is the system of units first defined in the British Weights and Measures Act 1824 and continued to be developed through a series of Weights and Measures Acts and amendments.
Inch
The inch (symbol: in or pprime) is a unit of length in the British Imperial and the United States customary systems of measurement.
See Gear and Inch
Indian subcontinent
The Indian subcontinent is a physiographical region in Southern Asia, mostly situated on the Indian Plate, projecting southwards into the Indian Ocean from the Himalayas.
See Gear and Indian subcontinent
Injection moulding
Injection moulding (U.S. spelling: injection molding) is a manufacturing process for producing parts by injecting molten material into a mould, or mold.
See Gear and Injection moulding
Institute for the Study of the Ancient World
The Institute for the Study of the Ancient World (ISAW) is a center for advanced scholarly research and graduate education at New York University.
See Gear and Institute for the Study of the Ancient World
Integer
An integer is the number zero (0), a positive natural number (1, 2, 3,...), or the negation of a positive natural number (−1, −2, −3,...). The negations or additive inverses of the positive natural numbers are referred to as negative integers.
See Gear and Integer
Investment casting
Investment casting is an industrial process based on lost-wax casting, one of the oldest known metal-forming techniques.
See Gear and Investment casting
Involute
In mathematics, an involute (also known as an evolvent) is a particular type of curve that is dependent on another shape or curve.
Involute gear
The involute gear profile is the most commonly used system for gearing today, with cycloid gearing still used for some specialties such as clocks. Gear and involute gear are gears.
Irfan Habib
Irfan Habib (born 10 August 1931) is an Indian historian of ancient and medieval India, following the methodology of Marxist historiography in his contributions to economic history.
Irrational number
In mathematics, the irrational numbers (in- + rational) are all the real numbers that are not rational numbers.
See Gear and Irrational number
Isfahan
Isfahan or Esfahan (اصفهان) is a major city in the Central District of Isfahan County, Isfahan province, Iran.
See Gear and Isfahan
Issus coleoptratus
Issus coleoptratus is a species of planthopper belonging to the family Issidae.
See Gear and Issus coleoptratus
James Clerk Maxwell
James Clerk Maxwell (13 June 1831 – 5 November 1879) was a Scottish physicist with broad interests who was responsible for the classical theory of electromagnetic radiation, which was the first theory to describe electricity, magnetism and light as different manifestations of the same phenomenon.
See Gear and James Clerk Maxwell
James Watt
James Watt (30 January 1736 (19 January 1736 OS) – 25 August 1819) was a Scottish inventor, mechanical engineer, and chemist who improved on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1776, which was fundamental to the changes brought by the Industrial Revolution in both his native Great Britain and the rest of the world.
Joseph Needham
Noel Joseph Terence Montgomery Needham (9 December 1900 – 24 March 1995) was a British biochemist, historian of science and sinologist known for his scientific research and writing on the history of Chinese science and technology, initiating publication of the multivolume Science and Civilisation in China.
Kinematic chain
In mechanical engineering, a kinematic chain is an assembly of rigid bodies connected by joints to provide constrained motion that is the mathematical model for a mechanical system.
Lancaster, New Hampshire
Lancaster is a town located along the Connecticut River in Coös County, New Hampshire, United States.
See Gear and Lancaster, New Hampshire
Lathe
A lathe is a machine tool that rotates a workpiece about an axis of rotation to perform various operations such as cutting, sanding, knurling, drilling, deformation, facing, threading and turning, with tools that are applied to the workpiece to create an object with symmetry about that axis.
See Gear and Lathe
Lever
A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum.
See Gear and Lever
Library of Alexandria
The Great Library of Alexandria in Alexandria, Egypt, was one of the largest and most significant libraries of the ancient world.
See Gear and Library of Alexandria
List of gear nomenclature
This page lists the standard US nomenclature used in the description of mechanical gear construction and function, together with definitions of the terms. Gear and list of gear nomenclature are gears.
See Gear and List of gear nomenclature
Lithuanian language
Lithuanian is an East Baltic language belonging to the Baltic branch of the Indo-European language family.
See Gear and Lithuanian language
Lunar phase
A lunar phase or Moon phase is the apparent shape of the Moon's directly sunlit portion as viewed from the Earth (because the Moon is tidally locked with the Earth, the same hemisphere is always facing the Earth).
Luoyang Museum
Luoyang Museum is a historical museum in Luoyang, Henan Province, China.
Ma Jun (mechanical engineer)
Ma Jun (220–265), courtesy name Deheng, was a Chinese mechanical engineer, inventor, and politician who lived in the state of Cao Wei during the Three Kingdoms period of China.
See Gear and Ma Jun (mechanical engineer)
Machine element
Machine element or hardware refers to an elementary component of a machine.
Machine head
A machine head (also referred to as a tuning machine, tuner, or gear head) is a geared apparatus for tuning stringed musical instruments by adjusting string tension.
Machining
Machining is a manufacturing process where a desired shape or part is created using the controlled removal of material, most often metal, from a larger piece of raw material by cutting.
Magnet
A magnet is a material or object that produces a magnetic field.
See Gear and Magnet
Magnetic coupling
A magnetic coupling is a component which transfers torque from one shaft to another using a magnetic field, rather than a physical mechanical connection.
See Gear and Magnetic coupling
Maple
Acer is a genus of trees and shrubs commonly known as maples.
See Gear and Maple
McGraw Hill Education
McGraw Hill is an American publishing company for educational content, software, and services for pre-K through postgraduate education.
See Gear and McGraw Hill Education
Mechanical advantage
Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system.
See Gear and Mechanical advantage
Mechanical efficiency
In mechanical engineering, mechanical efficiency is a dimensionless ratio that measures the efficiency of a mechanism or machine in transforming the power input to the device to power output.
See Gear and Mechanical efficiency
Metre
The metre (or meter in US spelling; symbol: m) is the base unit of length in the International System of Units (SI).
See Gear and Metre
Metric system
The metric system is a decimal-based system of measurement.
Micrometre
The micrometre (Commonwealth English) as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American English), also commonly known by the non-SI term micron, is a unit of length in the International System of Units (SI) equalling (SI standard prefix "micro-".
Microtechnology
Microtechnology is technology whose features have dimensions of the order of one micrometre (one millionth of a metre, or 10−6 metre, or 1μm).
Middle English
Middle English (abbreviated to ME) is a form of the English language that was spoken after the Norman Conquest of 1066, until the late 15th century.
Millimetre
Different lengths as in respect to the electromagnetic spectrum, measured by the metre and its derived scales. The microwave is between 1 meter to 1 '''millimeter'''. The millimetre (international spelling; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the International System of Units (SI), equal to one thousandth of a metre, which is the SI base unit of length.
Milling (machining)
Milling is the process of machining using rotary cutters to remove material by advancing a cutter into a workpiece.
See Gear and Milling (machining)
Modern physics
Modern physics is a branch of physics that developed in the early 20th century and onward or branches greatly influenced by early 20th century physics.
Moment of inertia
The moment of inertia, otherwise known as the mass moment of inertia, angular/rotational mass, second moment of mass, or most accurately, rotational inertia, of a rigid body is a quantity that determines the torque needed for a desired angular acceleration about a rotational axis, akin to how mass determines the force needed for a desired acceleration.
See Gear and Moment of inertia
Moon
The Moon is Earth's only natural satellite.
See Gear and Moon
Motion control
Motion control is a sub-field of automation, encompassing the systems or sub-systems involved in moving parts of machines in a controlled manner.
Music box
A music box (American English) or musical box (British English) is an automatic musical instrument in a box that produces musical notes by using a set of pins placed on a revolving cylinder or disc to pluck the tuned teeth (or ''lamellae'') of a steel comb.
NASA
The National Aeronautics and Space Administration (NASA) is an independent agency of the U.S. federal government responsible for the civil space program, aeronautics research, and space research.
See Gear and NASA
National Geographic
National Geographic (formerly The National Geographic Magazine, sometimes branded as NAT GEO) is an American monthly magazine published by National Geographic Partners.
See Gear and National Geographic
Near net shape
Near-net-shape is an industrial manufacturing technique.
New York University
New York University (NYU) is a private research university in New York City, United States.
See Gear and New York University
Noise control
Noise control or noise mitigation is a set of strategies to reduce noise pollution or to reduce the impact of that noise, whether outdoors or indoors.
Non-circular gear
A non-circular gear (NCG) is a special gear design with special characteristics and purpose. Gear and non-circular gear are gears.
See Gear and Non-circular gear
Old Norse
Old Norse, Old Nordic, or Old Scandinavian is a stage of development of North Germanic dialects before their final divergence into separate Nordic languages.
Oscillation
Oscillation is the repetitive or periodic variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states.
Paper mill
A paper mill is a factory devoted to making paper from vegetable fibres such as wood pulp, old rags, and other ingredients.
Parallelepiped
In geometry, a parallelepiped is a three-dimensional figure formed by six parallelograms (the term rhomboid is also sometimes used with this meaning).
Pearson Education
Pearson Education, known since 2011 as simply Pearson, is the educational publishing and services subsidiary of the international corporation Pearson plc.
See Gear and Pearson Education
Philo of Byzantium
Philo of Byzantium (Φίλων ὁ Βυζάντιος, Phílōn ho Byzántios), also known as Philo Mechanicus (Latin for "Philo the Engineer"), was a Greek engineer, physicist and writer on mechanics, who lived during the latter half of the 3rd century BC.
See Gear and Philo of Byzantium
Pinion
A pinion is a round gear—usually the smaller of two meshed gears—used in several applications, including drivetrain and rack and pinion systems. Gear and pinion are gears.
See Gear and Pinion
Planthopper
A planthopper is any insect in the infraorder Fulgoromorpha, in the suborder Auchenorrhyncha, a group exceeding 12,500 described species worldwide.
Polymath
A polymath (lit; lit) or polyhistor (lit) is an individual whose knowledge spans many different subjects, known to draw on complex bodies of knowledge to solve specific problems.
Popular Mechanics
Popular Mechanics (often abbreviated as PM or PopMech) is a magazine of popular science and technology, featuring automotive, home, outdoor, electronics, science, do it yourself, and technology topics.
See Gear and Popular Mechanics
Potentiometer
A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider.
Powder metallurgy
Powder metallurgy (PM) is a term covering a wide range of ways in which materials or components are made from metal powders.
See Gear and Powder metallurgy
Pressure
Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.
Pressure angle
Pressure angle in relation to gear teeth, also known as the angle of obliquity, is the angle between the tooth face and the gear wheel tangent. Gear and Pressure angle are gears.
Prime number
A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers.
Prism (geometry)
In geometry, a prism is a polyhedron comprising an polygon base, a second base which is a translated copy (rigidly moved without rotation) of the first, and other faces, necessarily all parallelograms, joining corresponding sides of the two bases.
Proto-Germanic language
Proto-Germanic (abbreviated PGmc; also called Common Germanic) is the reconstructed proto-language of the Germanic branch of the Indo-European languages.
See Gear and Proto-Germanic language
Proto-Indo-European language
Proto-Indo-European (PIE) is the reconstructed common ancestor of the Indo-European language family.
See Gear and Proto-Indo-European language
Ptolemaic Kingdom
The Ptolemaic Kingdom (Ptolemaïkḕ basileía) or Ptolemaic Empire was an Ancient Greek polity based in Egypt during the Hellenistic period.
See Gear and Ptolemaic Kingdom
Quantum mechanics
Quantum mechanics is a fundamental theory that describes the behavior of nature at and below the scale of atoms.
See Gear and Quantum mechanics
Quench press
A quench press is a machine that uses concentrated forces to hold an object as it is quenched. Gear and quench press are gears.
Rack and pinion
A rack and pinion is a type of linear actuator that comprises a circular gear (the pinion) engaging a linear gear (the rack). Gear and rack and pinion are gears.
Rack railway
A rack railway (also rack-and-pinion railway, cog railway, or cogwheel railway) is a steep grade railway with a toothed rack rail, usually between the running rails.
Radial shaft seal
Radial shaft seals, also known as lip seals, are used to seal rotary elements, such as a shaft or rotating bore.
See Gear and Radial shaft seal
Radian per second
The radian per second (symbol: rad⋅s−1 or rad/s) is the unit of angular velocity in the International System of Units (SI).
See Gear and Radian per second
Radius of curvature
In differential geometry, the radius of curvature,, is the reciprocal of the curvature.
See Gear and Radius of curvature
Ratio
In mathematics, a ratio shows how many times one number contains another.
See Gear and Ratio
Reciprocating motion
Reciprocating motion, also called reciprocation, is a repetitive up-and-down or back-and-forth linear motion.
See Gear and Reciprocating motion
Revolutions per minute
Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or r⋅min−1) is a unit of rotational speed (or rotational frequency) for rotating machines.
See Gear and Revolutions per minute
Rigid body
In physics, a rigid body, also known as a rigid object, is a solid body in which deformation is zero or negligible.
Robotics
Robotics is the interdisciplinary study and practice of the design, construction, operation, and use of robots.
Roman Egypt
Roman Egypt; was an imperial province of the Roman Empire from 30 BC to AD 641.
Rotation
Rotation or rotational motion is the circular movement of an object around a central line, known as axis of rotation.
Rotational frequency
Rotational frequency, also known as rotational speed or rate of rotation (symbols ν, lowercase Greek nu, and also n), is the frequency of rotation of an object around an axis.
See Gear and Rotational frequency
Rotational symmetry
Rotational symmetry, also known as radial symmetry in geometry, is the property a shape has when it looks the same after some rotation by a partial turn.
See Gear and Rotational symmetry
Saddle point
In mathematics, a saddle point or minimax point is a point on the surface of the graph of a function where the slopes (derivatives) in orthogonal directions are all zero (a critical point), but which is not a local extremum of the function.
Salisbury Cathedral clock
The Salisbury Cathedral clock is a large iron-framed tower clock without a dial, in Salisbury Cathedral, England.
See Gear and Salisbury Cathedral clock
Sand casting
Sand casting, also known as sand molded casting, is a metal casting process characterized by using sand—known as casting sand—as the mold material.
Screw
A screw is an externally helical threaded fastener capable of being tightened or released by a twisting force (torque) to the head.
See Gear and Screw
Sintering
Sintering or frittage is the process of compacting and forming a solid mass of material by pressure or heat without melting it to the point of liquefaction.
Skew lines
In three-dimensional geometry, skew lines are two lines that do not intersect and are not parallel.
Smithsonian (magazine)
Smithsonian is a science and nature magazine (and associated website, SmithsonianMag.com), and is the official journal published by the Smithsonian Institution in Washington, D.C., although editorially independent from its parent organization.
See Gear and Smithsonian (magazine)
South-pointing chariot
The south-pointing chariot (or carriage) was an ancient Chinese two-wheeled vehicle that carried a movable pointer to indicate the south, no matter how the chariot turned.
See Gear and South-pointing chariot
Spiral bevel gear
A spiral bevel gear is a bevel gear with helical teeth. Gear and spiral bevel gear are gears.
See Gear and Spiral bevel gear
Sprocket
A sprocket, sprocket-wheel or chainwheel is a profiled wheel with teeth that mesh with a chain, rack or other perforated or indented material. Gear and sprocket are gears.
Spur gear
Spur gears or straight-cut gears are the simplest type of gear. Gear and Spur gear are gears.
Steam engine
A steam engine is a heat engine that performs mechanical work using steam as its working fluid.
Steel
Steel is an alloy of iron and carbon with improved strength and fracture resistance compared to other forms of iron.
See Gear and Steel
Steering wheel
A steering wheel (also called a driving wheel, a hand wheel, or simply wheel) is a type of steering control in vehicles.
Strain wave gearing
Strain wave gearing (also known as harmonic gearing) is a type of mechanical gear system that uses a flexible spline with external teeth, which is deformed by a rotating elliptical plug to engage with the internal gear teeth of an outer spline. Gear and Strain wave gearing are gears.
See Gear and Strain wave gearing
String instrument
In musical instrument classification, string instruments or chordophones, are musical instruments that produce sound from vibrating strings when a performer plays or sounds the strings in some manner.
See Gear and String instrument
Sun and planet gear
The sun and planet gear is a method of converting reciprocating motion to rotary motion and was used in the first rotative beam engines. Gear and sun and planet gear are gears.
See Gear and Sun and planet gear
Superposition principle
The superposition principle, also known as superposition property, states that, for all linear systems, the net response caused by two or more stimuli is the sum of the responses that would have been caused by each stimulus individually.
See Gear and Superposition principle
Swedish language
Swedish (svenska) is a North Germanic language from the Indo-European language family, spoken predominantly in Sweden and in parts of Finland.
The Verge
The Verge is an American technology news website headquartered in Lower Manhattan, New York City and operated by Vox Media.
Thrust
Thrust is a reaction force described quantitatively by Newton's third law.
See Gear and Thrust
Thrust bearing
A thrust bearing is a particular type of rotary bearing.
Tie rod
A tie rod or tie bar (also known as a hanger rod if vertical) is a slender structural unit used as a tie and (in most applications) capable of carrying tensile loads only.
See Gear and Tie rod
Tin
Tin is a chemical element; it has symbol Sn and atomic number 50.
See Gear and Tin
Toothed belt
A toothed belt, timing belt, cogged belt, cog belt, or synchronous belt is a flexible belt with teeth moulded onto its inner surface.
Torque
In physics and mechanics, torque is the rotational analogue of linear force.
See Gear and Torque
Toughness
In materials science and metallurgy, toughness is the ability of a material to absorb energy and plastically deform without fracturing.
Translation
Translation is the communication of the meaning of a source-language text by means of an equivalent target-language text.
Transmission (mechanical device)
A transmission (also called a gearbox) is a mechanical device which uses a gear set—two or more gears working together—to change the speed, direction of rotation, or torque multiplication/reduction in a machine.
See Gear and Transmission (mechanical device)
Undercut (manufacturing)
In manufacturing, an undercut is a special type of recessed surface that is inaccessible using a straight tool.
See Gear and Undercut (manufacturing)
Unit of measurement
A unit of measurement, or unit of measure, is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same kind of quantity.
See Gear and Unit of measurement
University of Cambridge
The University of Cambridge is a public collegiate research university in Cambridge, England.
See Gear and University of Cambridge
Watch
A watch is a portable timepiece intended to be carried or worn by a person.
See Gear and Watch
Wave–particle duality
Wave-particle duality is the concept in quantum mechanics that quantum entities exhibit particle or wave properties according to the experimental circumstances.
See Gear and Wave–particle duality
Wear
Wear is the damaging, gradual removal or deformation of material at solid surfaces. Gear and Wear are Tribology.
See Gear and Wear
Worm drive
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). Gear and worm drive are gears.
Wuest type herringbone gear
A Wuest type herringbone gear, invented by Swiss engineer Caspar Wüst-Kunz in the early 20th century, is a type of herringbone gear wherein "the teeth on opposite sides of the center line are staggered by an amount equal to one half the circular pitch". Gear and Wuest type herringbone gear are gears.
See Gear and Wuest type herringbone gear
Zhou dynasty
The Zhou dynasty was a royal dynasty of China that existed for 789 years from until 256 BC, the longest of such reign in Chinese history.
Zodiac
The zodiac is a belt-shaped region of the sky that extends approximately 8° north and south (as measured in celestial latitude) of the ecliptic, the apparent path of the Sun across the celestial sphere over the course of the year.
See Gear and Zodiac
3D printing
3D printing or additive manufacturing is the construction of a three-dimensional object from a CAD model or a digital 3D model.
References
Also known as Cage gear, Circular gear, Cog Wheel, Cog Wheels, Cog-wheel, Cogwheel, Dedendum, Design and manufacturing of gears, Diametral pitch, External gear, Gear cog, Gear cogs, Gear profile, Gear teeth, Gear tooth, Gear wheel, Geared, Gears, Gearwheel, Helical gear, Hydraulic gear, Internal gear, Lantern gear, List of Cogs, Module (gears), Pitch (gear), Pitch circle diameter (gears), Plastic gear, Power gear, Skew gears, Spur gear drive, Spur gears, Spur-cut gear, Spur-gear, Straight-cut gear, .
, Frequency, Friction, Friction drive, Friction motor, Frustum, Gear, Gear cutting, Gear manufacturing, Gear shaping, Gear train, Geneva drive, German language, Giovanni Dondi dall'Orologio, Greatest common divisor, Gristmill, Heat treating, Helix, Hermetic seal, Hero of Alexandria, Herringbone gear, Hobbing, Hyperboloid, Imperial units, Inch, Indian subcontinent, Injection moulding, Institute for the Study of the Ancient World, Integer, Investment casting, Involute, Involute gear, Irfan Habib, Irrational number, Isfahan, Issus coleoptratus, James Clerk Maxwell, James Watt, Joseph Needham, Kinematic chain, Lancaster, New Hampshire, Lathe, Lever, Library of Alexandria, List of gear nomenclature, Lithuanian language, Lunar phase, Luoyang Museum, Ma Jun (mechanical engineer), Machine element, Machine head, Machining, Magnet, Magnetic coupling, Maple, McGraw Hill Education, Mechanical advantage, Mechanical efficiency, Metre, Metric system, Micrometre, Microtechnology, Middle English, Millimetre, Milling (machining), Modern physics, Moment of inertia, Moon, Motion control, Music box, NASA, National Geographic, Near net shape, New York University, Noise control, Non-circular gear, Old Norse, Oscillation, Paper mill, Parallelepiped, Pearson Education, Philo of Byzantium, Pinion, Planthopper, Polymath, Popular Mechanics, Potentiometer, Powder metallurgy, Pressure, Pressure angle, Prime number, Prism (geometry), Proto-Germanic language, Proto-Indo-European language, Ptolemaic Kingdom, Quantum mechanics, Quench press, Rack and pinion, Rack railway, Radial shaft seal, Radian per second, Radius of curvature, Ratio, Reciprocating motion, Revolutions per minute, Rigid body, Robotics, Roman Egypt, Rotation, Rotational frequency, Rotational symmetry, Saddle point, Salisbury Cathedral clock, Sand casting, Screw, Sintering, Skew lines, Smithsonian (magazine), South-pointing chariot, Spiral bevel gear, Sprocket, Spur gear, Steam engine, Steel, Steering wheel, Strain wave gearing, String instrument, Sun and planet gear, Superposition principle, Swedish language, The Verge, Thrust, Thrust bearing, Tie rod, Tin, Toothed belt, Torque, Toughness, Translation, Transmission (mechanical device), Undercut (manufacturing), Unit of measurement, University of Cambridge, Watch, Wave–particle duality, Wear, Worm drive, Wuest type herringbone gear, Zhou dynasty, Zodiac, 3D printing.