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Dial Indicator
In various contexts of science, technology, and manufacturing (such as machining, metal fabrication, fabricating, and additive manufacturing), an indicator is any of various instruments used to accurately measure small distances and angles, and wikt:amplify, amplify them to make them more obvious. The name comes from the concept of ''wikt:indicate#Verb, indicating'' to the user that which their naked eye cannot discern; such as the presence, or exact quantity, of some small distance (for example, a small height difference between two flat surfaces, a slight lack of concentricity between two cylinders, or other small physical deviations). The classic mechanical version, called a dial indicator, provides a dial (measurement), dial display similar to a clock face with clock hands; the hands point to graduations in circular scales on the dial which represent the distance of the probe tip from a zero setting. The internal works of a mechanical dial indicator are similar to the precisio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mahr MarCator 810 A Dial Indicator
In Islam, a mahr (in ; ; Bengali language, Bengali: দেনমোহর; ; ; ; also Romanization of Arabic, transliterated ''mehr'', ''meher'', ''denmohor, mehrieh'', or ''mahriyeh'') is the bride wealth obligation, in the form of money, possessions or teaching of verses from the Quran by the groom, to the bride in connection with an Marriage in Islam, Islamic wedding. While the ''mahr'' is often money, it can also be anything agreed upon by the bride such as jewelry, home goods, furniture, a dwelling or some land. Mahr is typically specified in the marriage contract signed upon marriage. "Dower" is the English translation that comes closest to Islamic meaning of mahr, as "dower" refers to the payment from the husband or his family to the wife, especially to support her in the event of his death, although subsequent to marriage the wife also acquires inheritance rights. However, mahr is distinct from dower in two ways: 1) mahr is legally required for all Islamic marriages while ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tolerance (engineering)
Engineering tolerance is the permissible limit or limits of variation in: # a physical dimension; # a measured value or physical property of a material, manufactured object, system, or service; # other measured values (such as temperature, humidity, etc.); # in engineering and safety, a physical distance or space (tolerance), as in a truck (lorry), train or boat under a bridge as well as a train in a tunnel (see structure gauge and loading gauge); # in mechanical engineering, the space between a bolt and a nut or a hole, etc. Dimensions, properties, or conditions may have some variation without significantly affecting functioning of systems, machines, structures, etc. A variation beyond the tolerance (for example, a temperature that is too hot or too cold) is said to be noncompliant, rejected, or exceeding the tolerance. Considerations when setting tolerances A primary concern is to determine how wide the tolerances may be without affecting other factors or the outcome of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physics
Physics is the scientific study of matter, its Elementary particle, fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." It is one of the most fundamental scientific disciplines. "Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physics. (...) You will come to see physics as a towering achievement of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lathe (metal)
In machining, a metal lathe or metalworking lathe is a large class of lathes designed for precisely machining relatively hard materials. They were originally designed to machine metals; however, with the advent of plastics and other materials, and with their inherent versatility, they are used in a wide range of applications, and a broad range of materials. In machining jargon, where the larger context is already understood, they are usually simply called ''lathes'', or else referred to by more-specific subtype names ('' toolroom lathe'', '' turret lathe'', etc.). These rigid machine tools remove material from a rotating workpiece via the (typically linear) movements of various cutting tools, such as tool bits and drill bits. Metal lathes can vary greatly, but the most common design is known as the universal lathe or parallel lathe. Construction The design of lathes can vary greatly depending on the intended application; however, basic features are common to most types. These ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Engineering
Engineering is the practice of using natural science, mathematics, and the engineering design process to Problem solving#Engineering, solve problems within technology, increase efficiency and productivity, and improve Systems engineering, systems. Modern engineering comprises many subfields which include designing and improving infrastructure, machinery, vehicles, electronics, Materials engineering, materials, and energy systems. The Academic discipline, discipline of engineering encompasses a broad range of more Academic specialization, specialized fields of engineering, each with a more specific emphasis for applications of applied mathematics, mathematics and applied science, science. See glossary of engineering. The word '':wikt:engineering, engineering'' is derived from the Latin . Definition The American Engineers' Council for Professional Development (the predecessor of the Accreditation Board for Engineering and Technology aka ABET) has defined "engineering" as: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moldmaker
A moldmaker (mouldmaker in English-speaking countries other than the US) or molder (moulder) is a skilled tradesperson who fabricates ''molds'' (or ''moulds'') for use in casting metal products. Moldmakers are generally employed in foundries, where molds are used to cast products from metals such as aluminium and cast iron. Injection molding The term moldmaker may also refer to workers employed in fabricating dies and metal moulds for use in injection molding and die-casting, such as in the plastics, rubber or ceramics industries, in which case it is sometimes regarded as a branch of the trade of toolmaker.. The process of manufacturing molds is often highly automated. Although many of the machining processes involved in mold making use computer-controlled equipment for the manufacturing of molds (particularly plastic and rubber injection and transfer), moldmaking remains a highly skilled trade, requiring expertise in manual machining, CNC machining, CNC wire EDM, CNC Ram ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tool And Die Maker
Tool and die makers are highly skilled crafters working in the manufacturing, manufacturing industries. Tool and die makers work primarily in toolroom environments—sometimes literally in one room but more often in an environment with flexible, semipermeable boundaries from production work. They are skilled artisans (craft production, craftspeople) who typically learn their trade through a combination of academic coursework and with substantial period of on-the-job training that is functionally an apprenticeship. They make Jig (tool), jigs, Fixture (tool), fixtures, die (manufacturing), dies, molding (process), molds, machine tools, cutting tool (machining), cutting tools, gauge (instrument), gauges, and other tools used in manufacturing processes. Divisions The main divisions of the tool & die industry include: *Die casting *Die (manufacturing), Dies *Fixture (tool), Fixtures *Forging *Gauge (instrument), Gauges *Jig (tool), Jigs *Metalworking, Metal working *Molding (process), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quality (business)
In business, engineering, and manufacturing, quality – or high quality – has a pragmatic interpretation as the non-inferiority or wikt:superiority, superiority of something (goods or service (economics), services); it is also defined as being suitable for the intended purpose (fitness for purpose) while satisfying customer expectations. Quality is a perceptual, conditional, and somewhat subjectivity, subjective attribute and may be understood differently by different people. Consumers may focus on the Acceptance testing, specification quality of a product/service, or how it compares to competitors in the marketplace. Producers might measure the Conformance testing, conformance quality, or degree to which the product/service was produced correctly. Support personnel may measure quality in the degree that a product is wikt:reliable, reliable, Maintainability, maintainable, or sustainability, sustainable. In such ways, the subjectivity of quality is rendered objectivity (philosoph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosine Error
Cosine error is a type of measurement error caused by the difference between the intended and actual directions in which a measurement is taken. Depending on the type of measurement, it either multiplies or divides the true value by the cosine of the angle between the two directions. For small angles the resulting error is typically very small, since an angle needs to be relatively large for its cosine to depart significantly from 1. Approximate error sizes for a few example angles are: The error is equivalent to treating the hypotenuse and one of the other sides of a right-angled triangle as if they were equal; the cosine of the angle between them is the ratio of their lengths. Concept A simple example of cosine error is taking a measurement across a rectangle but failing to realize that the line of measurement is not quite parallel with the edges, being slightly diagonal. Rather than measuring the desired vector (in this case, orthogonal width), the instrument is measurin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gauge Block
Gauge blocks (also known as gage blocks, Johansson gauges, slip gauges, or Jo blocks) are a system for producing precision lengths. The individual gauge block is a metal or ceramic block that has been precision grinding (abrasive cutting), ground and Lapping, lapped to a specific thickness. Gauge blocks come in sets of blocks with a range of standard lengths. In use, the blocks are stacked to make up a desired length (or height). Gauge blocks were invented in 1896 by Swedish machinist Carl Edvard Johansson. They are used as a reference for the calibration of measuring equipment used in machine shops, such as micrometer (device), micrometers, sine bars, calipers, and dial gauge, dial indicators (when used in an Quality control, inspection role). Gauge blocks are the main means of length standardization used by industry. An important feature of gauge blocks is that they can be joined together with very little dimensional uncertainty. The blocks are joined by a sliding process ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imperial And US Customary Measurement Systems
The imperial and US customary measurement systems are both derived from an earlier English system of measurement which in turn can be traced back to Ancient Roman units of measurement, and Carolingian and Saxon units of measure. The US Customary system of units was developed and used in the United States after the American Revolution, based on a subset of the English units used in the Thirteen Colonies; it is the predominant system of units in the United States and in U.S. territories (except for Puerto Rico and Guam, where the metric system, which was introduced when both territories were Spanish colonies, is also officially used and is predominant). The imperial system of units was developed and used in the United Kingdom and its empire beginning in 1824. The metric system has, to varying degrees, replaced the imperial system in the countries that once used it. Most of the units of measure have been adapted in one way or another since the Norman Conquest (1066). The unit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thousandth Of An Inch
A thousandth of an inch is a derived unit of length in a system of units using inches. Equal to of an inch, a thousandth is commonly called a thou (used for both singular and plural) or, particularly in North America, a mil (plural mils). The words are shortened forms of the English and Latin words for "thousand" ( in Latin). In international engineering contexts, confusion can arise because ''mil'' is a formal unit name in North America but ''mil'' or ''mill'' is also a common colloquial clipped form of millimetre. The units are considerably different: a millimetre is approximately 39 mils. Contexts of use The thou, or mil, is most commonly used in engineering and manufacturing in non-metric countries. For example, in specifying: * The thickness of items such as paper, film, foil, wires, paint coatings, latex gloves, plastic sheeting, and fibers ** For example, most plastic ID cards are about in thickness. ** Card stock thickness in the United States, where mils are also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
