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Screw-cutting Lathe
A screw-cutting lathe is a machine (specifically, a lathe) capable of cutting very accurate screw threads via single-point screw-cutting, which is the process of guiding the linear motion of the tool bit in a precisely known ratio to the rotating motion of the workpiece. This is accomplished by gearing the leadscrew (which drives the tool bit's movement) to the spindle with a certain gear ratio for each thread pitch. Every degree of spindle rotation is matched by a certain distance of linear tool travel, depending on the desired thread pitch (English or metric, fine or coarse, etc.). The name "screw-cutting lathe" carries a taxonomic qualification on its use—it is a term of historical classification rather than one of current commercial machine tool terminology. Early lathes, many centuries ago, were not adapted to screw-cutting. Later, from the Late Middle Ages until the early nineteenth century, some lathes were distinguishable as "screw-cutting lathes" because of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maudslay Screw-cutting Lathes Of Circa 1797 And 1800
Henry Maudslay ( pronunciation and spelling) (22 August 1771 – 14 February 1831) was an English machine tool innovator, tool and die maker, and inventor. He is considered a founding father of machine tool technology. His inventions were an important foundation for the Industrial Revolution. Maudslay's invention of a metal lathe to cut metal, circa 1800, enabled the manufacture of standard screw thread sizes. Standard screw thread sizes allowed interchangeable parts and the development of mass production. Early life Maudslay was the fifth of seven children of Henry Maudslay, a wheelwright in the Royal Engineers, and Margaret (''nee'' Whitaker), the young widow of Joseph Laundy. His father was wounded in action and so in 1756 became an 'artificer' at the Royal Arsenal, Woolwich (then in Kent), where he remained until 1776 and died in 1780. The family lived in an alley that no longer exists, off Beresford Square, between Powis Street and Beresford Street. Career Maudsla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whittling
Whittling may refer either to the art of carving shapes out of raw wood using a knife or a time-occupying process of repeatedly shaving slivers from a piece of wood. It is used by many as a pastime, or as a way to make artistic creations. Background of whittling Casual whittling is typically performed with a light, small-bladed knife, usually a pocket knife. Specialized whittling knives, with fixed single blades, are preferred for sculpting artistic work. They have thick handles which are easier to grip for long periods and have better leverage, allowing more precise control and pressure. Occasionally the terms "whittling" and "carving" are used interchangeably, but they are different arts. Carving employs the use of chisels, gouges, with or without a mallet, and often powered equipment such as lathes. Whittling, however, involves only the use of a knife. In industrialized areas of the world, whittling is mainly a hobby and not an occupational activity as it was before powere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clockmaker
A clockmaker is an artisan who makes and/or repairs clocks. Since almost all clocks are now factory-made, most modern clockmakers only repair clocks. Modern clockmakers may be employed by jewellers, antique shops, and places devoted strictly to repairing clocks and watches. Clockmakers must be able to read blueprints and instructions for numerous types of clocks and time pieces that vary from antique clocks to modern time pieces in order to fix and make clocks or watches. The trade requires fine motor coordination as clockmakers must frequently work on devices with small gears and fine machinery. Originally, clockmakers were master craftsmen who designed and built clocks by hand. Since modern clockmakers are required to repair antique, handmade or one-of-a-kind clocks for which parts are not available, they must have some of the design and fabrication abilities of the original craftsmen. A qualified clockmaker can typically design and make a missing piece for a clock with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ornamental Turning
Ornamental turning is a type of turning, a craft that involves cutting of a work mounted in a lathe. The work can be made of any material that is suitable for being cut in this way, such as wood, bone, ivory or metal. Plain turning is work executed on a lathe where a transverse section through any part of the work comprises a plain circle. Ornamental turning, also called Complex turning, is executed on a lathe with attachments which convert that plain circular section to variants of outline; these range from a simple series of cuts taken at intervals around the work (so producing grooves or bumps on the surface) to non-circular movements whereby the whole of the circular shape is removed to give a completely different form. Such shapes are achieved by various means, the principal ones being: * Cutting with a fixed or revolving cutter while the work is rotated on a non-radial path, e.g.- eccentrically, elliptically, epicyclically or, following a path determined by a template or recip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonardo Da Vinci
Leonardo di ser Piero da Vinci (15 April 1452 - 2 May 1519) was an Italian polymath of the High Renaissance who was active as a painter, draughtsman, engineer, scientist, theorist, sculptor, and architect. While his fame initially rested on his achievements as a painter, he has also become known for #Journals and notes, his notebooks, in which he made drawings and notes on a variety of subjects, including anatomy, astronomy, botany, cartography, painting, and palaeontology. Leonardo is widely regarded to have been a genius who epitomised the Renaissance humanism, Renaissance humanist ideal, and his List of works by Leonardo da Vinci, collective works comprise a contribution to later generations of artists matched only by that of his younger contemporary Michelangelo. Born out of wedlock to a successful notary and a lower-class woman in, or near, Vinci, Tuscany, Vinci, he was educated in Florence by the Italian painter and sculptor Andrea del Verrocchio. He began his career ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slide Rest
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 mac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Modern Period
The early modern period is a Periodization, historical period that is defined either as part of or as immediately preceding the modern period, with divisions based primarily on the history of Europe and the broader concept of modernity. There is no exact date that marks the beginning or end of the period and its extent may vary depending on the area of history being studied. In general, the early modern period is considered to have lasted from around the start of the 16th century to the start of the 19th century (about 1500–1800). In a European context, it is defined as the period following the Middle Ages and preceding the advent of modernity; but the dates of these boundaries are far from universally agreed. In the context of World history (field), global history, the early modern period is often used even in contexts where there is no equivalent "medieval" period. Various events and historical transitions have been proposed as the start of the early modern period, including ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Middle Ages
The late Middle Ages or late medieval period was the Periodization, period of History of Europe, European history lasting from 1300 to 1500 AD. The late Middle Ages followed the High Middle Ages and preceded the onset of the early modern period (and in much of Europe, the Renaissance). Around 1350, centuries of prosperity and growth in Europe came to a halt. A series of famines and Plague (disease), plagues, including the Great Famine of 1315–1317 and the Black Death, reduced the population to around half of what it had been before the calamities. Along with depopulation came social unrest and endemic warfare. Kingdom of France, France and Kingdom of England, England experienced serious peasant uprisings, such as the Jacquerie and the Peasants' Revolt, as well as over a century of intermittent conflict, the Hundred Years' War. To add to the many problems of the period, the unity of the Catholic Church was temporarily shattered by the Western Schism. Collectively, those events ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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. Lathes are used in woodturning, metalworking, metal spinning, thermal spraying, reclamation, and glass-working. Lathes can be used to shape pottery, the best-known design being the Potter's wheel. Most suitably equipped metalworking lathes can also be used to produce most solids of revolution, plane surfaces and screw threads or helices. Ornamental lathes can produce three-dimensional solids of incredible complexity. The workpiece is usually held in place by either one or two ''centers'', at least one of which can typically be moved horizontally to accommodate varying workpiece lengths. Other work-holding methods include clamping the work about the axis of rotation using a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
File (tool)
A file is a tool used to remove fine amounts of material from a workpiece. It is common in woodworking, metalworking, and other similar trade and hobby tasks. Most are hand tools, made of a case hardened steel bar of rectangular, square, triangular, or round cross-section, with one or more surfaces cut with sharp, generally parallel Tine (structural), teeth. A narrow, pointed Tang (tools), tang is common at one end, to which a handle may be fitted.. A rasp is a form of file with distinct, individually cut teeth used for coarsely removing large amounts of material. Files have also been developed with abrasive surfaces, such as natural or synthetic diamond tool, diamond grains or silicon carbide, allowing removal of material that would dull or resist steel files, such as ceramic. History Early filing or rasping has prehistoric roots and grew naturally out of the blending of the twin inspirations of cutting with stone cutting tools (such as hand axes) and abrasive, abrading u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walking Stick
A walking stick (also known as a walking cane, cane, walking staff, or staff) is a device used primarily to aid walking, provide postural stability or support, or assist in maintaining a good posture. Some designs also serve as a fashion accessory, or are used for self-defense. Walking sticks come in many shapes and sizes and some have become collector's items. People with disabilities may use some kinds of walking sticks as a crutch, but a walking cane is not designed for full weight support but used to help with balance. The walking stick has also historically been known to be used as a self-defense weapon, and may conceal a sword or knife. Hikers use walking sticks, also known as trekking poles, pilgrim's staffs, hiking poles, or hiking sticks, for a wide variety of purposes: as a support when going uphill or as a brake when going downhill; as a balance point when crossing streams, swamps, or other rough terrain; to feel for obstacles in the path; to test mud and wate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
