Divided into silver and blue; in the upper part two obliquely traversed flails, in the lower part a golden boring tool. The town's flag shows the colours red and gold.
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Newly purchased equipment is supplied with specific usage information (i.e. cutting data with tools). This information is found in supplier specific documentation (i.e. the maximum allowed diameter of a fine boring tool).
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The drill bit for digging boreholes was operated by a team of men jumping on and off a beam while the boring tool was rotated by a draft animal, usually oxen or water buffaloes.Tom (1989), 103. Han boreholes dug for collecting brine could reach hundreds of meters (feet) beneath the Earth's surface.Ronan (1994), 91.
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Before the new acquisition can be used, the data must be integrated in the company-specific task format. (i.e. The exact setup values for a required fine boring tool). Furthermore, this information must be made available to all participating work areas. (i.e. the exact adjusted diameter must be made known to the NC programming and tool store departments).
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In 1774 John Wilkinson invented a boring machine with the shaft holding the boring tool supported on both ends, extending through the cylinder, unlike the then used cantilevered borers. With this machine he was able to successfully bore the cylinder for Boulton and Watt's first commercial engine in 1776.. Reprinted by McGraw-Hill, New York and London, 1926 (); and by Lindsay Publications, Inc., Bradley, Illinois, (). Watt never ceased improving his designs.
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The species was first published in 1876 by Ferdinand von Mueller, based on specimens collected at Queen Victoria Spring by Jess Young during the Giles expedition of May 1875. The specific epithet (salubris) is a Latin word meaning "healthful", "wholesome" or "beneficial", in reference to the healthy appearance of the tree. The common name refers to the fluted or twisted trunks, resembling a carpenter’s gimlet which is a boring tool. There are no subspecies or varieties.
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The word "brogue" came into English in the late sixteenth century. It comes from the Gaelic bróg (Irish), bròg (Scottish) "shoe", from the Old Norse "brók" meaning "leg covering". The Scots word brogue is also used to denote a bradawl or boring tool as well as the action of piercing with such a tool. The word "brogue" was first used to describe a form of outdoor, country walking shoe in the early twentieth century traditionally worn by men.
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Boring can be done on mills, lathes or drill press machines, either with a boring head or with just a boring tool. The shorter the distance between the tool holder and the material, the less distortion created from vibration or unbalanced gyroscopic effects. The greater the distance (static or dynamic mounts) the more flex in the tool or an increase in the imbalance of a moving tool. Use of a boring head increases the mass of the tool holder and decreases the distance.
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Rumford had observed the frictional heat generated by boring cannon at the arsenal in Munich. Rumford immersed a cannon barrel in water and arranged for a specially blunted boring tool. He showed that the water could be boiled within roughly two and a half hours and that the supply of frictional heat was seemingly inexhaustible. Rumford confirmed that no physical change had taken place in the material of the cannon by comparing the specific heats of the material machined away and that remaining were the same.
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The word "bore" as a noun meaning a "thing which causes ennui or annoyance" is attested to since 1778; "of persons by 1812". The noun "bore" comes from the verb "bore", which had the meaning "[to] be tiresome or dull" first attested [in] 1768, a vogue word c. 1780–81 according to Grose (1785); possibly a figurative extension of "to move forward slowly and persistently, as a [hole-] boring tool does." The French term for boredom, ennui, is sometimes used in English as well, at least since 1778.
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Woodworkers have used boring as a form of drilling for centuries. In woodworking, the boring tool is static in size and used to form circular plunge cuts. In metalworking, boring is slightly different in that the hole that results need not be circular. In metal boring the tool can be plunged and dragged on the X or Y axes to create a slot or asymmetrical hole or channel, or it may be moved only in an up-and- down motion (on the Z axis) to create a perfect circular hole.
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K.S. Tom describes the drilling process: "The Chinese method of deep drilling was accomplished by a team of men jumping on and off a beam to impact the drilling bit while the boring tool was rotated by buffalo and oxen."Tom (1989), 103. This was the same method used for extracting petroleum in California during the 1860s (i.e. "Kicking Her Down"). A Western Han Dynasty bronze foundry discovered in Xinglong, Hebei had nearby mining shafts which reached depths of 100 m (328 ft) with spacious mining areas; the shafts and rooms were complete with a timber frame, ladders and iron tools.Loewe (1968), 191.
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Rumford's most important scientific work took place in Munich, and centred on the nature of heat, which he contended in "An Experimental Enquiry Concerning the Source of the Heat which is Excited by Friction" (1798) was not the caloric of then-current scientific thinking but a form of motion. Rumford had observed the frictional heat generated by boring cannon at the arsenal in Munich. Rumford immersed a cannon barrel in water and arranged for a specially blunted boring tool. He showed that the water could be boiled within roughly two and a half hours and that the supply of frictional heat was seemingly inexhaustible.
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Roughing, or rough turning Parting aluminium Finish turning Turning is a machining process in which a cutting tool, typically a non-rotary tool bit, describes a helix toolpath by moving more or less linearly while the workpiece rotates. Usually the term "turning" is reserved for the generation of external surfaces by this cutting action, whereas this same essential cutting action when applied to internal surfaces (holes, of one kind or another) is called "boring". Thus the phrase "turning and boring" categorizes the larger family of processes known as lathing. The cutting of faces on the workpiece, whether with a turning or boring tool, is called "facing", and may be lumped into either category as a subset.
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