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Compass Saw
A compass saw is a type of saw used for making curved cuts known as compasses, particularly in confined spaces where a larger saw would not fit. Characteristics Compass saws have a narrow, tapered blade usually ending in a sharp point, typically with a tooth pitch of 2.5 to 3 mm (eight to ten teeth per inch), but down to 1.3 mm (up to 20 teeth per inch) for harder materials and as long as 5 mm (as few as five teeth per inch) for softer materials. They have a curved, light "pistol grip" handle, designed for work in confined spaces and overhead. The blade of a compass saw may be fixed or retractable, and blades are typically interchangeable. Partially retracting the blade can prevent flexing and breaking when cutting harder materials. Compass saws are suitable for cutting softer woods, plastic, drywall, and non-ferrous metals. The pointed tip of the blade can be used to penetrate softer materials without the need for a pilot hole. Comparison with other types of saws Compared wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compass (architecture)
In carpentry, architecture, and shipbuilding, a compass is a curved circular form. Examples * A compass plane is a plane that is convex, length-ways, on the underside, for smoothing the concave faces of curved woodwork. * A compass saw is a narrow-bladed saw that cuts a curve. * A compass timber is a curved (or crooked) timber, sometimes used in shipbuilding. * A compass brick is a curved brick. * A compass wall is a curved wall. * A compass window is a circular bay window A bay window is a window space projecting outward from the main walls of a building and forming a bay in a room. A bow window is a form of bay with a curve rather than angular facets; an oriel window is a bay window that does not touch the g ....Sturgis, Russell. "Compass" "Sturgis' illustrated dictionary of architecture and building: an unabridged reprint of the 1901-2 edition". Mineola, N.Y.: Dover, 1989. Print. * A surveyor's compass (or circumferentor) is a measuring instrument used in surveyi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pistol Grip
On a firearm or other tools, a pistol grip is a distinctly protruded handle underneath the main mechanism, to be held by the user's hand at a more vertical (and thus more ergonomic) angle, similar to how one would hold a conventional pistol. In firearms, the pistol grip is located behind the trigger (firearms), trigger and generally held by the hand that operates the trigger. Rifles and shotguns without pistol grips are generally referred to as having "straight" or "upland" (shotguns only) style stock (firearms), stocks. Some firearms, starting from a 1840s Belgian carbine, and some automatic weapons in the 20th century (e. g., Chauchat MG, Thompson submachine gun, Thompson submachine gun, AK-47 assault rifle), have a second vertical forward grip, frontal pistol grip (or foregrip) on the firearm's forearm (firearm component), fore-end to be used by the support hand for better stability in operation. Pistol grips can also serve multiple functions, such as a magazine (firearm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pilot Hole
In construction, a pilot hole is a small hole Drilling, drilled into a piece of construction material. Its purpose may be: # to guide a larger drill to the appropriate location and ease the job of the larger drill, # allow the insertion of another hole-making tool, such as a knockout punch, that will produce the final-sized hole, or # locate, guide, and provide clearance for a Self-tapping screw, self-threading screw in wood or plastic to prevent damaging the material or breaking the screw. Pilot for large holes A pilot hole may be drilled the full extent of the final hole, or may only be a portion of the final depth. The pilot drill may be a standard twist drill, another type of drill bit appropriate for the material, or, when the primary purpose is precisely locating a hole, may be made with a short, stiff center drill. The pilot hole also reduces the power needed to turn a large drill bit, and reduces the large bit breakage risk. For twist drill bits, the pilot size is usu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coping Saw
A coping saw is a type of bow saw used to cut intricate external shapes and interior cut-outs in woodworking or carpentry. It is widely used to cut moldings to create coped rather than mitre joints. It is occasionally used to create fretwork though it is not able to match a fretsaw in intricacy of cut, particularly in thin materials. Coping saw blades are always thicker and much coarser cutting than typical fretsaw blades and many others of its family members. Coping saws can however cut slight bends in the work, allowing circles to be cut if used carefully. History The coping saw was most likely invented in the middle of the 16th century following innovations in metallurgy and with the invention of the spring-driven clock. Blades made of this material were strong and flexible thanks to rolling. This saw was also used in combination with the so-called ''Chevalet de Marqueterie'', invented in 1780, allowing to saw pack of veneers with one angle of cut. Construction A c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fretsaw
The fretsaw is a bow saw used for intricate cutting work which often incorporates tight curves. The tool takes its name from its use in fretwork. Although traditionally intended for woodwork, different blades increase the versatility of this saw. Description The fretsaw is a bow saw used for intricate cutting work which often incorporates tight curves. The tool takes its name from its use in fretwork and ultimately from the French ' (lattice)—a reference to the intricate patterns often created using this tool. The fretsaw is similar in many respects to the scroll saw, which is essentially a powered fretsaw with a table. Blades between the two tools are usually interchangeable, and indeed scroll saws are often known as "fret saws" informally. Use Although the coping saw is often used for similar work, the fretsaw is capable of much tighter radii and more delicate work. It has a distinctive appearance due to the depth of its frame (typically between ), which together with th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drywall
Drywall (also called plasterboard, dry lining, wallboard, sheet rock, gib board, gypsum board, buster board, turtles board, slap board, custard board, gypsum panel and gyprock) is a panel made of calcium sulfate dihydrate (gypsum), with or without additives, typically extruded between thick sheets of facer and backer paper, used in the construction of interior walls and ceilings. The plaster is mixed with fiber (typically paper, glass wool, or a combination of these materials); plasticizer, foaming agent; and additives that can reduce mildew, flammability, and water absorption. In the mid-20th century, drywall construction became prevalent in North America as a time- and labor-saving alternative to lath and plaster. History Sackett Board was invented in 1890 by New York Coal Tar Chemical Company employees Augustine Sackett and Fred L. Kane, graduates of Rensselaer Polytechnic Institute. It was made by layering plaster within four plies of wool felt paper. Sheets were thick w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keyhole Saw
A keyhole saw (also called a pad saw, alligator saw, jab saw or drywall saw) is a long, narrow saw used for cutting small, often awkward features in various building materials. There are typically two varieties of keyhole saw: the fixed blade type and the retractable blade type. The retractable-blade variety is usually found to have either a cast-iron handle or, less commonly, a wooden handle. The facility to retract the blade to an optimum length serves to prevent unwanted flex to the blade should the full length of the blade be obstructed in some way. In both types, the blade is typically secured by one or two holding/thumb screws. The cheaper, fixed-blade type is more commonly used in the modern construction trade. With the advance of certain building methods and materials, designs specific to these trades have been developed. One such modification being a sharpened point at the tip of the blade which can be pushed or jabbed through soft materials such as drywall without dril ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
