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Combination Square
A combination square is a multi-purpose measuring and marking tool used in metalworking, woodworking, and stonemasonry. It is composed of a Ruler, rule and one or more interchangeable heads that can be attached to the rule. Other names for the tool include adjustable square, combo square, and sliding square. The most common head is the standard head, which is used as a Square (tool), square for marking and testing 90° and 45° angles. The other common types of head are the protractor head, and the centre finder head. Description Rule Combination square rules are made of steel and can be purchased with gradations in Metric system, metric, Imperial units, imperial, or both metric and imperial. Both faces of the rule have markings, providing four different sets of markings. This allows different sides to have different graduations (eg. 1mm or 0.5mm markings) or units (ie. metric and imperial). The rule typically comes in lengths between 150mm and 600mm or between 4 inches and 24 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Square (tool)
A square is a tool used for marking and referencing a Right angle, 90° angle, though Miter square, mitre squares are used for 45° angles. Squares see common use in woodworking, metalworking, construction and technical drawing. Some squares incorporate a scale for measuring distances (a ruler) or for calculating angles. Terminology Many squares are made of two parts, a ''stock'' and a straight ''blade'' or ''tongue''. The stock is usually thicker than the blade, with the blade being fixed into or onto the stock. The blade typically has parallel edges. The stock is usually held against the edge of a workpiece or drawing board and the tongue is then used as a straight edge for making a mark, or as a reference to check the accuracy of an angle. History Wooden Try square, try squares have survived from Ancient Egyptian technology, Ancient Egypt and Roman technology, Ancient Rome and can be seen in art from the time. From the 18th century squares began to be manufactured in Fact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Straightedge
A straightedge or straight edge is a tool used for drawing straight lines, or checking their straightness. If it has equally spaced markings along its length, it is usually called a ruler. Straightedges are used in the automotive service and machining industry to check the flatness of machined mating surfaces. They are also used in the decorating industry for cutting and hanging wallpaper. True straightness can in some cases be checked by using a laser line level as an optical straightedge: it can illuminate an accurately straight line on a flat surface such as the edge of a plank or shelf. A pair of straightedges called winding sticks are used in woodworking to make warping easier to perceive in pieces of wood. Three straight edges can be used to test and calibrate themselves to a certain extent, however this procedure does not control twist. For accurate calibration of a straight edge, a surface plate must be used. Compass-and-straightedge construction An idealized ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States asserts sovereignty over five Territories of the United States, major island territories and United States Minor Outlying Islands, various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's List of countries and dependencies by area, third-largest land area and List of countries and dependencies by population, third-largest population, exceeding 340 million. Its three Metropolitan statistical areas by population, largest metropolitan areas are New York metropolitan area, New York, Greater Los Angeles, Los Angel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Athol, Massachusetts
Athol (, ) is a town in Worcester County, Massachusetts, United States. The population was 11,945 at the 2020 census. History Originally called Pequoiag when settled by Native Americans, the area was subsequently settled by five families in September 1735. When the township was incorporated in 1762, the name was changed to Athol. John Murray, one of the proprietors of the land, chose the name which traditionally was believed to mean "New Ireland" although some, including historian James E. Fraser, dispute this definition. Early residents subsisted on agriculture and hunting. By 1791, Athol had four gristmills, six sawmills, a fulling mill, and a shop with a trip hammer, all of which were operated by water power. The Athol Cotton Factory, built in 1811, was one of the first industries to serve a market beyond the local one. Through the 1800s, textile, leather, wood, and metal industries further expanded the market for goods produced in Athol. The construction of the Vermo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Normal (geometry)
In geometry, a normal is an object (e.g. a line, ray, or vector) that is perpendicular to a given object. For example, the normal line to a plane curve at a given point is the infinite straight line perpendicular to the tangent line to the curve at the point. A normal vector is a vector perpendicular to a given object at a particular point. A normal vector of length one is called a unit normal vector or normal direction. A curvature vector is a normal vector whose length is the curvature of the object. Multiplying a normal vector by results in the opposite vector, which may be used for indicating sides (e.g., interior or exterior). In three-dimensional space, a surface normal, or simply normal, to a surface at point is a vector perpendicular to the tangent plane of the surface at . The vector field of normal directions to a surface is known as '' Gauss map''. The word "normal" is also used as an adjective: a line ''normal'' to a plane, the ''normal'' component of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Dowel
The dowel is a cylindrical shape made of wood, plastic, or metal. In its original manufactured form, a dowel is long and called a ''dowel rod'', which are often cut into shorter ''dowel pins''. Dowels are commonly used as structural reinforcements in cabinet making and in numerous other applications, including: * Furniture shelf supports * Moveable game pieces (i.e. pegs) * Hangers for items such as clothing, key rings, and tools * Wheel axles in toys * Detents in gymnastics grips * Supports for tiered wedding cakes Wood dowel Manufacturing process The traditional tool for making dowels is a ''dowel plate'', an iron (or better, hardened tool steel) plate with a hole having the size of the desired dowel. To make a dowel, a piece of wood is split or whittled to a size slightly bigger than desired and then driven through the hole in the dowel plate. The sharp edges of the hole shear off the excess wood.Ivin SickelsExercises in Wood-Working American Book Company, 1889; see ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Combination Square Centre Finder Head Diagram
In mathematics, a combination is a selection of items from a set that has distinct members, such that the order of selection does not matter (unlike permutations). For example, given three fruits, say an apple, an orange and a pear, there are three combinations of two that can be drawn from this set: an apple and a pear; an apple and an orange; or a pear and an orange. More formally, a ''k''-combination of a set ''S'' is a subset of ''k'' distinct elements of ''S''. So, two combinations are identical if and only if each combination has the same members. (The arrangement of the members in each set does not matter.) If the set has ''n'' elements, the number of ''k''-combinations, denoted by C(n,k) or C^n_k, is equal to the binomial coefficient \binom nk = \frac, which can be written using factorials as \textstyle\frac whenever k\leq n, and which is zero when k>n. This formula can be derived from the fact that each ''k''-combination of a set ''S'' of ''n'' members has k! permutati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Sliding T Bevel
A sliding T bevel, also known as a bevel gauge or false square is an adjustable Gauge (instrument), gauge for setting and transferring angles. Different from the square (tool), square, which is fixed and can only set a right angle, 90° angle, the sliding T bevel can set any angle and transfer it on another piece. The bevel gauge is composed of two elements connected with a thumbscrew (fastener), thumbscrew or wingnut (hardware), wing nut, which allows the blade to pivot and be locked at any angle. The handle is usually made of wood or plastic and the blade of metal. The bevel can be used to duplicate an existing angle, or set to a desired angle by using it with any number of other measuring tools (such as a protractor, or Steel square, framing square). See also *Bevel *Miter square References Sources *Reader's Digest "Book of Skills & Tools" Angle Dimensional instruments Woodworking measuring instruments {{Woodworking-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Combination Square Protractor Head Diagram
In mathematics, a combination is a selection of items from a set that has distinct members, such that the order of selection does not matter (unlike permutations). For example, given three fruits, say an apple, an orange and a pear, there are three combinations of two that can be drawn from this set: an apple and a pear; an apple and an orange; or a pear and an orange. More formally, a ''k''-combination of a set ''S'' is a subset of ''k'' distinct elements of ''S''. So, two combinations are identical if and only if each combination has the same members. (The arrangement of the members in each set does not matter.) If the set has ''n'' elements, the number of ''k''-combinations, denoted by C(n,k) or C^n_k, is equal to the binomial coefficient \binom nk = \frac, which can be written using factorials as \textstyle\frac whenever k\leq n, and which is zero when k>n. This formula can be derived from the fact that each ''k''-combination of a set ''S'' of ''n'' members has k! permutati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Popular Woodworking Magazine
''Popular Woodworking'' is a woodworking magazine published by Cruz Bay Publishing an arm of Active Interest Media Active Interest Media (AIM) is a publisher specializing in "niche enthusiast magazines" (i.e. magazines targeted at hobbyists). History The company was formed in 2003 by private-equity investment firm Wind Point Partners by the acquisition of '' .... History and profile The magazine's focus is a combination of hand tool and power tool woodworking including many how-to projects. The magazine underwent many changes in ownership, most recently as a result of the bankruptcy of F+W Media where they got sold to Cruz Bay Publishing and Active Interest Media. Notable contributors * Roy Underhill * Christopher Schwarz * Mary May References External links * Hobby magazines published in the United States Monthly magazines published in the United States Woodworking magazines Arts and crafts magazines {{woodworking-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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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. Military topics, aviation and transportation of all types, space, tools and gadgets are commonly featured. It was founded in 1902 by Henry Haven Windsor, who was the editor and—as owner of the Popular Mechanics Company—the publisher. For decades, the tagline of the monthly magazine was "Written so you can understand it." In 1958, PM was purchased by the Hearst Corporation, now Hearst Communications. In 2013, the US edition changed from twelve to ten issues per year, and in 2014 the tagline was changed to "How your world works." The magazine added a podcast in recent years, including regular features ''Most Useful Podcast Ever'' and ''How Your World Works''. History ''Popular Mechanics'' was founded as a weekly in Chicago by Henry Haven Windsor, with the first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Marking Gauge
A marking gauge, also known as a scratch gauge, is used in woodworking and metalworking to marking out, mark out lines for cutting or other operations. The purpose of the gauge is to scribe a line parallel to a reference edge or surface. It is used in joinery and Fabrication (metal), sheetmetal operations. The gauge consists of a beam, a headstock, and a scribing or marking implement, typically a pin, knife, pen or wheel. The headstock slides along the beam, and is locked in place by various means: a locking screw, Cam (mechanism), cam lever, or a Wedge (mechanical device), wedge. The marking implement is fixed to one end of the beam. Types The marking implement is chosen depending upon the operation to be performed. Some marking gauges have the capability for a number of implements to be fitted, others do not; a woodworker will often have a number of different types. A steel pin is used when scribing with the grain, a steel knife when scribing across the grain. The pen or pencil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |