kb/data/en.wikipedia.org/wiki/Glossary_of_mechanical_engineering-9.md

title	chunk	source	category	tags	date_saved	instance
Glossary of mechanical engineering	10/12	https://en.wikipedia.org/wiki/Glossary_of_mechanical_engineering	reference	science, encyclopedia	2026-05-05T07:51:05.490215+00:00	kb-cron

== G == Gas compressor – Gauge – Gear – a rotating circular machine part having cut or inserted teeth which mesh with another compatible toothed part to transmit torque and speed. Each gear tooth essentially functions as a lever with its fulcrum at the gear's center. Gear coupling – a mechanical device for transmitting torque between two shafts that are not collinear. It consists of a flexible joint fixed to each shaft. The two joints are connected by a third shaft, called the spindle. Gear ratio – the ratio of the pitch circles of mating gears which defines the speed ratio and the mechanical advantage of the gear set. Granular material –

== H == Heat engine – a system that converts heat or thermal energy—and chemical energy—to mechanical energy, which can then be used to do mechanical work. Heat transfer – Heating and cooling systems – Hinge – Hoberman mechanism – Hobson's joint – Hooke's law – Hotchkiss drive – HVAC – Hydraulics – Hydrostatics –

== I == Ideal machine – Ideal mechanical advantage – Imperial College London – Inclined plane – Independent suspension – Inductor – Industrial engineering – Inertia – Institution of Mechanical Engineers – Instrumentation – Integrated circuit – Intelligent pump – Invention – a unique or novel device, method, composition, idea or process. An inventor who creates or discovers a new invention can sometimes receive a patent, or legal right to exclude others from making, using, or selling that invention for a limited time.

== J == Jack chain – Jacking gear – JIC fitting – Joule – the SI unit of energy, which uses the symbol J. It is equal to the amount of work done when a force of 1 newton displaces a mass through a distance of 1 metre in the direction of the force applied. It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second.

== K == Kelvin – the primary SI unit of temperature, which uses the symbol K and has absolute zero as its zero point. The temperature in degree Celsius is defined as the temperature in kelvins minus 273.15 (i.e. 0 °C is equal to 273.15 K). Kinematic determinacy – Kinematics –

== L == Laser – Leaf spring – Lever – a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. A lever amplifies an input force to provide a greater output force, which is said to provide leverage. The ratio of the output force to the input force is the mechanical advantage of the lever. Liability – Life cycle cost analysis – Limit state design – Linkage – Live axle – Load transfer – Locomotive – Lubrication –

== M == Machine – Machine learning – Machinery's Handbook – a classic, one-volume reference work in mechanical engineering and practical workshop mechanics published by Industrial Press, New York, since 1914; its 31st edition was published in 2020. Recent editions of the handbook contain chapters on mathematics, mechanics, materials, measuring, toolmaking, manufacturing, threading, gears, and machine elements, combined with excerpts from ANSI standards. Magnetic circuit – Margin of safety – Mass transfer – Materials – Materials engineering – Material selection – Mechanical advantage – Mechanical biological treatment – Mechanical efficiency – Mechanical engineering – Mechanical equilibrium – Mechanical work – Mechanics – Mechanochemistry – Mechanosynthesis – Mechatronics – Microelectromechanical systems – Micromachinery – Microprocessor – Microtechnology – Modulus of rigidity-- Molecular assembler – Molecular nanotechnology – Moment – Moment of inertia – Motorcycle – Multi-link suspension –

== N == Nanotechnology – Newton (unit) – the SI unit of force, which uses the symbol N. It is defined as 1 kg⋅m/s2, the force which gives a mass of 1 kilogram an acceleration of 1 metre per second per second. It is named after Isaac Newton in recognition of his work on classical mechanics, specifically Newton's second law of motion. Normal stress – Nozzle –

== O == Ohm's law – states that the current through a conductor between two points is directly proportional to the voltage across the two points. It is typically expressed as the equation I = V ÷ R, where I is the current through the conductor, V is the voltage measured across the conductor and R is the resistance of the conductor. Orientation Overdrive – Oversteer –

== P == Pascal (unit) – the SI unit of pressure, which uses the symbol Pa and is defined as one newton per square metre. It is also used to quantify internal pressure, stress, Young's modulus, and ultimate tensile strength. Physics – Pinion – Piston – Pitch drop experiment – Plain bearing – Plasma processing – Plasticity – Pneumatics – Poisson's ratio – Position vector – Potential difference – Power – the amount of energy transferred or converted per unit time. Power is a scalar quantity. Power stroke – Pressure – Process control – Product lifecycle management – Professional engineer (PE) – In the United States, this designation is given to engineers who have passed the Principles and Practice of Engineering exam, or PE exam. Upon passing the PE exam and meeting other eligibility requirements, that vary by state, such as education and experience, an engineer can then become registered in their State to stamp and sign engineering drawings and calculations as a PE. Project management – Pulley – Pump –

== Q == Quality – Quality control – Quality assurance –

== R == Rack and pinion – Rack railway – Railcar – Rail gauge – Railroad car – Railroad switch – Rail tracks – Random vibration – Reaction kinetics – Rear wheel drive – Refrigeration – Reliability engineering – Relief valve – RepRap Project – Resistive force – Resistor – Reverse engineering – Rheology – Rigid body – Robotics – Roller chain – Rolling – Rotordynamics – Rube Goldberg machine –