That's why Kerf Cases, a Pittsburgh-based manufacturer, is so cool.
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Kerf says you should expect them to ship within 1-3 weeks of your order date.
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This exclusive discount also applies to Kerf's wireless charging pad, as well as the Kerf Select wireless charging block.
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That's what Kerf is suggesting, and it's produced a dead-tree vessel that's meant to hold precisely one Apple Card.
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Compared to most companies, Kerf takes a more sustainable approach to making phone accessories: it fashions them out of a wood casing of your choice.
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"This project will deliver real benefits for people living in rural Vanuatu, and we are proud to be supporting the government of Vanuatu to help achieve 100 percent renewable access by 2030," Kerf added.
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"Access to electricity is a crucial part of building safer homes and communities, and creating new economic opportunities," Michel Kerf, country director for the World Bank in Timor-Leste, Papua New Guinea and the Pacific Islands, said.
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If you can't find the wood grain that you're looking for, or if you have exceptional taste, the Kerf Select wireless charging block is built with rare species of wood, such as black Gabon ebony or Australian eucalyptus burl.
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Davies and Ghahramani proposed Random Forest Kernel and show that it can empirically outperform state-of-art kernel methods. Scornet first defined KeRF estimates and gave the explicit link between KeRF estimates and random forest. He also gave explicit expressions for kernels based on centered random forest and uniform random forest, two simplified models of random forest. He named these two KeRFs Centered KeRF and Uniform KeRF, and proved upper bounds on their rates of consistency.
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There is also reduced-kerf carbide and diamond grit edges for fast cutting in hard materials.
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Cutting speed and wire temperature combine to determine the thickness and consistency of kerf. For a given wire temperature, an attempted motion in excess of the wire's ability to melt the foam can lead to wire drag and poor surface finish of the cut foam. Conversely, dwelling in the foam any longer than strictly required to melt the cut path can lead to excessively thick kerf. A nonuniform feed rate can lead to a kerf of varying thickness.
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The dowels are connected to an angle bracket that is in turn connected by anchor bolts to the building's load-bearing wall or steel frame. Kerf anchorage systems operate in much the same way with different metal hardware. The kerf system uses grooves cut into the edges of stone veneer panels in which kerf plates or cleats are inserted, those plates are mounted to the wall behind and act much like a shelf on which the stone panel rests. Both the dowel and Kerf anchorage systems can be attached to the top, bottom and sides of each panel ensuring a secure hold and binding the panels together to make a complete veneer.
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Accuracy is also affected by the precision to which the templates are formed and proper assessment and handling of kerf.
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The technique in using a two-man saw involved a sawyer standing at each end. Together the sawyers would alternate pulling the saw through the wood. If the kerf began closing, causing the saw to bind, wedges would be inserted behind the sawblade in order to keep the kerf open. Cutting from underneath a suspended log, called "underbucking", might also have been used if binding became a big problem.
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Abler, W.L. 2001. A kerf-and-drill model of tyrannosaur tooth serrations. p. 84-89. In: Mesozoic Vertebrate Life. Ed.s Tanke, D. H., Carpenter, K., Skrepnick, M. W. Indiana University Press.
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Abler, W.L. 2001. A kerf-and- drill model of tyrannosaur tooth serrations. p. 84–89. In: Mesozoic Vertebrate Life. Ed.s Tanke, D. H., Carpenter, K., Skrepnick, M. W. Indiana University Press.
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Abler, W.L. 2001. A kerf-and-drill model of tyrannosaur tooth serrations. p. 84-89. In: Mesozoic Vertebrate Life. Ed.s Tanke, D. H., Carpenter, K., Skrepnick, M. W. Indiana University Press.
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Miter saws are dedicated cross cut saws; long rip cuts (in line with the grain) are not possible. A laser guide provides a precise visual indication of where the cut will be positioned on the workpiece in the current configuration. Some models provide a single reference line for one side of the kerf, while others provide two lines to reflect the total kerf width. A blade guard is a cover for the teeth of the cutting blade.
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A panel hacksaw A panel hacksaw has a frame made of a deep, thin sheet aligned behind the blade's kerf, so that the saw could cut into panels of sheet metal without the length of cut being restricted by the frame. The frame follows the blade down the kerf into the panel. Junior hacksaws are a small version with a half-size blade. Like coping saws, the blade has pins that are held by notches in the frame.
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Cutting with a hole saw is analogous to some machining operations, called trepanning in the trade, that swing a cutter analogous to a fly cutter in order to achieve a similar result of annular kerf and intact core.
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The early railways would not accept ties cut with a saw, as it was claimed that the kerf of the saw splintered the fibres of the wood, leaving them more likely to soak up moisture causing premature rot.
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William Abler observed in 2001 that Albertosaurus tooth serrations resemble a crack in the tooth ending in a round void called an ampulla.Abler, W.L. 2001. A kerf-and-drill model of tyrannosaur tooth serrations. p. 84–89. In: Mesozoic Vertebrate Life.
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Wiedemann has published poems in a number of journals, including Kaleidoscope, Kerf, Poetry Motel, and Acorn. Three of her collections were published by Finishing Line Press: Half-Life of Love (2008), Sometime in October, and Death of a Pope and Other Poems (2012).
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One major advantage of wire saws is their smaller kerf, as compared to a blade. Another is the precision of the cut. Their main disadvantage is the slower speed. Other disadvantages include a greater chance the wire will break and any surface imperfections can cause errors in the cut.
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A resaw is a large bandsaw optimized for cutting timber along the grain to reduce larger sections into smaller sections or veneers. Resawing veneers requires a wide blade—commonly —with a small kerf to minimize waste. Resaw blades of up to may be fitted to a standard bandsaw.
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The upper and lower diamond guides are usually accurate to , and can have a cutting path or kerf as small as using Ø wire, though the average cutting kerf that achieves the best economic cost and machining time is using Ø brass wire. The reason that the cutting width is greater than the width of the wire is because sparking occurs from the sides of the wire to the work piece, causing erosion. This "overcut" is necessary, for many applications it is adequately predictable and therefore can be compensated for (for instance in micro-EDM this is not often the case). Spools of wire are long — an 8 kg spool of 0.25 mm wire is just over 19 kilometers in length.
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A table saw is typically used for cross-cutting and ripping; cross-cutting slices a board across its grain width-wise, ripping cuts lengthwise along the grain. Various conditions experienced while cutting either way can cause a partially cut board to move, twist, or have the saw blade's kerf close up and bind the blade. Poor blade or fence alignment, operator error, or pre-existing stresses in the wood released by cutting may cause these different and dangerous conditions. A riving knife rides within the kerf, pivoting on the saw's arbor in relation to blade height, to maintain an even gap between the two cut sides of the board, preventing jamming which could cause the stock to be forcefully ejected rearward toward the saw's operator.
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Disadvantages include a wider kerf (tooth bite) than a bandsaw, creating more sawdust with the cut width. However many concede the improved accuracy and straightness of the sawn boards often mitigates the initial loss of sawdust in the cut. The result is fewer rejected boards and less planing required further down the processing path.
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Water jet cutters are also capable of producing intricate cuts in material. With specialized software and 3-D machining heads, complex shapes can be produced.Lorincz, Waterjets: Evolving from Macro to Micro. The kerf, or width, of the cut can be adjusted by swapping parts in the nozzle, as well as changing the type and size of abrasive.
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A concrete saw being readied for use. The man in the background is preparing the hose to deliver water to prevent harmful dust from rising up, whilst the operator is moving the saw to the required position. A substantial engine powers the unit. kerf left by a diamond blade used to cut control joints in concrete.
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Depending upon material thickness, kerf widths as small as are possible.Todd, p. 185. In order to be able to start cutting from somewhere other than the edge, a pierce is done before every cut. Piercing usually involves a high-power pulsed laser beam which slowly makes a hole in the material, taking around 5–15 seconds for stainless steel, for example.
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Melt and blow or fusion cutting uses high-pressure gas to blow molten material from the cutting area, greatly decreasing the power requirement. First the material is heated to melting point then a gas jet blows the molten material out of the kerf avoiding the need to raise the temperature of the material any further. Materials cut with this process are usually metals.
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Typical abrasive cuts have a kerf in the range of , but can be as narrow as . Non-abrasive cuts are normally , but can be as small as , which is approximately that of a human hair. These small jets can permit small details in a wide range of applications. Water jets are capable of attaining accuracy down to and repeatability down to .
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Electron-beam machining (EBM) is a process where high-velocity electrons concentrated into a narrow beam that are directed towards the work piece, creating heat and vaporizing the material. EBM can be used for very precise cutting or boring of a wide variety of metals. Surface finish is better and kerf width is narrower than those for other thermal cutting processes.
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Resaw blades used in a sawmill. A resaw is a large band saw optimized for cutting timber along the grain to reduce larger sections into smaller sections or veneers. Resawing veneers requires a wide blade – commonly 2 to 3 inches (52–78 mm) – with a small kerf to minimize waste. Resaw blades of up to 1 inch (26 mm) may be fitted to a standard band saw.
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Most Western and Asian handsaws use an alternating set, whereby a tooth is set the opposite direction from the preceding one. Specialized tools like veneer saws or flush-cut saws may be set only to one side. Some hacksaws and machine saw blades have patterned sets that may require specially designed saw sets to create. See Saw and Sawfiler for more detailed information about set, kerf, and maintenance of saws.
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Scroll saws are often used to cut intricate curves and joints, a task they can complete quickly and with great accuracy. They can also be used to cut dovetail joints and are a common tool for thicker intarsia projects. When a fine blade is used, the kerf of a scroll saw is almost invisible. Along with band saws, jigsaws, and now recently seen chainsaws, scroll saws are used with modern intarsia.
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He continued to play a white-faced Pierrot at the Opéra-Comique during the 1920s. In 1925, he performed with the flamenco dancer Antonia Mercé y Luque, "La Argentina", in El amor brujo at the Théâtre Trianon-Lyrique. From 1916 Wague taught at the Conservatoire national supérieur d'art dramatique. Wague taught mimes who went on the fame such as Christine Kerf, Caroline Otéro, Angèle Héraud and Charlotte Wiehé.
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In sawmills, a swage is used to flare large bandsaw or circle saw teeth, which increases the width of the cut, called the kerf. A clamp attaches a mandrel and die to the tooth and the eccentric die is rotated, swaging the tip. A much earlier version of the same operation used a hardened, shaped swage die and a hand held hammer. Saw teeth formed in this way are sometimes referred to as being "set".
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Cutting on the pull stroke is claimed to cut more efficiently and leave a narrower cut width (kerf). On the other hand, a pull stroke does not easily permit putting one's body weight behind a stroke. This can be readily solved by using a vice or clamping. Another disadvantage, due to the arrangement and form of the teeth, is that Japanese saws do not work as well on hardwoods as European saws do.
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DWC produces less kerf and wasted materials compared to solid blades (slurry wire may be similar). On very expensive materials, this could save hundreds or thousands of dollars of waste. Unlike slurry saws that use bare wire and contain the cutting material in the cutting fluid, DWC uses only water or some fluid to lubricate, cool the cut, and remove debris. On some materials DWC may not need water or cutting fluid, thus leaving a clean dry cut.
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Sanger's first book, The America Reel, was published by Pottersfield Press in 1983. This collection was followed by five poetry collections including Earth Moth (1991), Ironworks (2001) and Kerf (2002). Sanger has published collections of poetry and essays and has edited the complete works of Canadian poet John Thompson. Many readers also know Sanger for his measured criticism and insightful reviews of work by Douglas Lochhead, Richard Outram, Robert Bringhurst, John Thompson, Emily Carr and Elizabeth Bishop.
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Electron-beam machining is a process in which high-velocity electrons are concentrated into a narrow beam with a very high planar power density. The beam cross-section is then focused and directed toward the work piece, creating heat and vaporizing the material. Electron- beam machining can be used to accurately cut or bore a wide variety of metals. The resulting surface finish is better and kerf width is narrower than what can be produced by other thermal cutting processes.
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The TungstenEX- nozzles more than double the life of (conventional) nozzle orifices, thus again improving the process, while maintaining a focused plasma cutting arc. This results in 15-30% higher cutting speed,(depending on thickness of material being cut) less dross, minimum kerf angle, and longer lifetime of both the electrodes and the nozzles while extending the life torch itself due to lower generated heating effect. Thermacut also offers a recycling program for the SilverEX- electrodes which results in an environmentally friendly product.
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Pictorial representations of three different types of nesting algorithms: Linear, Plate and Packing Nesting algorithms are used to make the most efficient use of material or space by evaluating many different possible combinations via recursion. #Linear (1-dimensional): The simplest of the algorithms illustrated here. For an existing set there is only one position where a new cut can be placed – at the end of the last cut. Validation of a combination involves a simple Stock - Yield - Kerf = Scrap calculation.
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As for other saws they are set from side to side to provide a kerf or clearance when sawing, but the set of a hacksaw changes gradually from tooth to tooth in a smooth curve, rather than alternate teeth set left and right. Hacksaw blades are normally quite brittle, so care needs to be taken to prevent brittle fracture of the blade. Early blades were of carbon steel, now termed 'low alloy' blades, and were relatively soft and flexible. They avoided breakage, but also wore out rapidly.
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It is also shipped as a liquid in Dewar type vessels (like a large Thermos jar) to places that use large amounts of oxygen. It is also possible to separate oxygen from air by passing the air, under pressure, through a zeolite sieve that selectively adsorbs the nitrogen and lets the oxygen (and argon) pass. This gives a purity of oxygen of about 93%. This method works well for brazing, but higher-purity oxygen is necessary to produce a clean, slag-free kerf when cutting.
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The sloping slots in the cylinder wall help carry the dust out. The kerf of the cut is designed to be slightly larger than the diameter of the rest of the hole saw so that it does not get jammed in the hole. Holes saws for use with portable drills are commonly available in diameters from 6 to 130 mm, or in the US, ¼ to 6 inches. The only limit on the length of the cylinder, and thus depth of the hole, is the need to remove the bit from the hole to clear dust.
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Miter saws commonly come in 10" and 12" blade size configurations and are commonly made of carbon steel and may come with a coating to make the cut easier. While the blade sizes are interchangeable with table saws, a miter blade is optimized for short cuts across the grain of the wood with little pull, where as table saws are optimized for long rip cuts with the grain and pulling the material into the blade. Blades are marked with their number of teeth, kerf and hook angle. Teeth ranges vary from 24 to 100 teeth.
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This can be done by placing a straightedge across the front of the wheels and adjusting until each wheel touches. Rotate the wheels with the blade in position and properly tensioned and check that the tracking is correct. Now install the blade guide rollers and leave a gap of about 1 mm between the back of the blade and the guide flange. The teeth of blades that have become narrow through repeated sharpening will foul the front edge of the guide rollers due to their kerf set and force the blade out of alignment.
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Due to its relatively narrow kerf, water jet cutting can reduce the amount of scrap material produced, by allowing uncut parts to be nested more closely together than traditional cutting methods. Water jets use approximately per minute (depending on the cutting head's orifice size), and the water can be recycled using a closed-loop system. Waste water usually is clean enough to filter and dispose of down a drain. The garnet abrasive is a non-toxic material that can be mostly recycled for repeated use; otherwise, it can usually be disposed in a landfill.
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There are a variety of systems for attaching stone veneers to facades including dowel, kerf, and undercut anchoring systems as well as direct fixing. The direct or adhered fixing system relies on a mortar or cement bonding between the substrate wall and the backside of the stone veneer. This application is generally used indoors as exterior weathering and temperature extremes cause the veneer to crack and spall. The complete connection between the veneer and substrate does not account for differing rates of thermal expansion between materials, causing them to bind under pressure.
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In oxy-fuel cutting, a torch is used to heat metal to its kindling temperature. A stream of oxygen is then trained on the metal, burning it into a metal oxide that flows out of the kerf as dross.The Oxy-Acetylene Handbook, Union Carbide Corp 1975 Torches that do not mix fuel with oxygen (combining, instead, atmospheric air) are not considered oxy-fuel torches and can typically be identified by a single tank (oxy-fuel cutting requires two isolated supplies, fuel and oxygen). Most metals cannot be melted with a single-tank torch.
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While a log used for solid lumber is cut into thick pieces, usually no thinner than 1/8 of an inch (3 mm), veneers are cut as thin as 1/40 of an inch (0.6 mm). Depending on the cutting process used by the veneer manufacturer, very little wood is wasted by the saw blade thickness, known as the saw kerf. Accordingly, the yield of a rare grain pattern or wood type is greatly increased, in turn placing less stress on the resource. Some manufacturers even use a very wide knife to "slice off" the thin veneer pieces.
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As the price of these has dropped to be comparable with the older blades, their use is now almost universal. The most common blade is the 12 inch or 300 mm length. Hacksaw blades have a hole at each end for mounting them in the saw frame and the 12 inch / 300 mm dimension refers to the center to center distance between these mounting holes.Machinery's Handbook, 14th Edition, by Erik Oberg & F. D. Jones, The Industrial Press, 1952, pages 1390-1391 The kerf produced by the blades is somewhat wider than the blade thickness due to the set of the teeth.
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Although traditionally intended for woodwork, metal cutting blades are readily available increasing the versatility of this saw. Spiral blades are also available which have teeth on all sides of the blade, and will cut in any direction without the need to rotate either the saw or the work piece. This can be useful when access is restricted due to the size of the component being worked, and compensate in part for the inability to rotate the blade in the manner possible with a coping saw. However, they also have a wider kerf and as such remove more material than a conventional blade.
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A hole saw with pilot bit A diamond hole saw A hole saw (also styled holesaw), also known as a hole cutter, is a saw blade of annular (ring) shape, whose annular kerf creates a hole in the workpiece without having to cut up the core material. It is used in a drill. Hole saws typically have a pilot drill bit (arbor) at their center to keep the saw teeth from walking. The fact that a hole saw creates the hole without needing to cut up the core often makes it preferable to twist drills or spade drills for relatively large holes (especially those larger than ).
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Prices for conventional solar cells remained constant or even rose slightly during the period of silicon shortage from 2005 to 2008. This is notably seen as a "shoulder" that sticks out in the Swanson's PV-learning curve and it was feared that a prolonged shortage could delay solar power becoming competitive with conventional energy prices without subsidies. In the meantime the solar industry lowered the number of grams-per-watt by reducing wafer thickness and kerf loss, increasing yields in each manufacturing step, reducing module loss, and raising panel efficiency. Finally, the ramp up of polysilicon production alleviated worldwide markets from the scarcity of silicon in 2009 and subsequently lead to an overcapacity with sharply declining prices in the photovoltaic industry for the following years.
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Timber mills use very large bandsaws for ripping lumber; they are preferred over circular saws for ripping because they can accommodate large-diameter timber and because of their smaller kerf (cut size), resulting in less waste. There are also small portable sawmills consisting of a shop-size bandsaw mounted on a guiding table, which are called bandsaw mills (band saw mills, band sawmills). Like chain saw mills (a chainsaw on a guiding table), they can be used inexpensively by one or two people out in the field. In a full-size sawmill, the blades are mounted on wheels with a diameter large enough not to cause metal fatigue due to flexing when the blade repeatedly changes from a circular to a straight profile.
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A collet, one type of chuck, is a sleeve with a (normally) cylindrical inner surface and a conical outer surface. The collet can be squeezed against a matching taper such that its inner surface contracts to a slightly smaller diameter, squeezing the tool or workpiece whose secure holding is desired. Most often this is achieved with a spring collet, made of spring steel, with one or more kerf cuts along its length to allow it to expand and contract. An alternative collet design is one that has several tapered steel blocks (essentially tapered gauge blocks) held in circular position (like the points of a star, or indeed the jaws of a jawed chuck) by a flexible binding medium (typically synthetic or natural rubber).
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Using these feet, the cabinets need not be shimmed or scribed to the floor for leveling. The toe kick board is attached to the cabinet by means of a clip, which is either screwed onto the back side of the kick board, or a barbed plastic clip is inserted into a saw kerf, also made on the back side of the kick board. This toe kick board can be made to fit each base cabinet, or made to fit a run of cabinets. Kitchen cabinets, or any cabinet generally at which a person may stand, usually have a fully enclosed base in which the front edge has been set back 75 mm or so to provide room for toes, known as the kick space.
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TSH2200 Thibaut wire saw Mining and quarrying industries commonly use a wire saw to cut hard stone into large blocks that can then be shipped to processing plants to be further refined (in the case of ore dressing) or shipped to distributors (in the case of granite or marble for building). These wire saws are large machines that use diamond-impregnated beads on a cable. The saws allow the bottom of a quarry slab to be cut free (after the cable is passed through access drill holes); with the bottom cut, back and side charges (explosives) can cleanly cleave the slab. Quarry saws on this principle date back centuries; before the era of steel cables with diamond cutters, there were fiber ropes that drew sand through the kerf.
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The collet can be squeezed against a matching taper such that its inner surface contracts to a slightly smaller diameter, squeezing the tool or workpiece to hold it securely. Most often this is achieved with a spring collet, made of spring steel, with one or more kerf cuts along its length to allow it to expand and contract. An alternative collet design is one that has several tapered steel blocks (essentially tapered gauge blocks) held in circular position (like the points of a star, or indeed the jaws of a jawed chuck) by a flexible binding medium (typically synthetic or natural rubber). Regardless of the collet design, the operating principle is the same: squeeze the collet against the tool or workpiece to be held, resulting in high static friction and accurate alignment.
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Depending on the cutting head, the maximum cutting angle for the A axis can be anywhere from 55, 60, or in some cases even 90 degrees from vertical. As such, 5-axis cutting opens up a wide range of applications that can be machined on a water jet cutting machine. A 5-axis cutting head can be used to cut 4-axis parts, where the bottom surface geometries are shifted a certain amount to produce the appropriate angle and the Z-axis remains at one height. This can be useful for applications like weld preparation where a bevel angle needs to be cut on all sides of a part that will later be welded, or for taper compensation purposes where the kerf angle is transferred to the waste material – thus eliminating the taper commonly found on water jet-cut parts.
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In May, 1853, be rented a small sawmill in South Muscatine, which he afterwards purchased and operated until 1857, when be proceeded to build a mill costing US$70,000 and containing four gangs of saws, in addition to a mulay used for siding down the larger logs. This mill was subsequently enlarged until an annual capacity of was reached. Hershey was recognized by the sawmill fraternity as the pioneer in the use of thin gang saws, running with satisfactory results as early as 1876, saws of eighteen-gauge thickness making kerf of but one-eighth inch. About 1880, he purchased the Burdick mill, or what was then known as the lower mill, in South Muscatine, which he practically rebuilt, increasing its capacity almost to that of the upper mill; and, in addition, he purchased a mill site on Lake St. Croix, at Stillwater, Minnesota, and there erected another mill with a capacity of per annum, the product of which was also for a number of years marketed at Muscatine, being rafted and towed to that point.
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