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Surface feet per minute (SFPM or SFM) is the combination of a physical quantity (surface speed) and an imperial and American customary unit (feet per minute or FPM). It is defined as the number of linear feet that a location on a rotating component travels in one minute. Its most common use is in the measurement of cutting speed (surface speed ...
Cutting speed may be defined as the rate at the workpiece surface, irrespective of the machining operation used. A cutting speed for mild steel of 100 ft/min is the same whether it is the speed of the cutter passing over the workpiece, such as in a turning operation, or the speed of the cutter moving past a workpiece, such as in a milling operation.
The most important of the tools used in line-engraving is the burin, or graver, a bar of steel with one end fixed in a handle, somewhat resembling a mushroom with one side cut away. The burin is shaped so that the sharpened, cutting end takes the form of a lozenge , and points downward.
A burin diagram, showing the handle, shaft, cutting tip, and face. [1] The bend in the shaft is especially associated with wood engraving. [2] A burin (/ ˈ b j ʊər ɪ n, ˈ b ɜːr ɪ n / BUR(E)-in) is a steel cutting tool used in engraving, from the French burin (cold chisel). Its older English name and synonym is graver. [3]
Page border by Hans Holbein the Younger; revival of the first technique.. Metalcut was a relief printmaking technique, belonging to the category of old master prints.It was almost entirely restricted to the period from about 1450 to 1540, and mostly to the region around the Rhine in Northern Europe, the Low Countries, Germany, France and Switzerland; the technique perhaps originated in the ...
Sixty-seven people are dead after a regional jet collided with an Army Black Hawk helicopter Wednesday night over Washington, D.C., officials said, the nation's first major commercial airline ...
Half-speed mastering is a technique occasionally used when cutting the acetate lacquers from which phonograph records are produced. The cutting machine platter is run at half of the usual speed (16 2 ⁄ 3 rpm for 33 1 ⁄ 3 rpm records) while the signal to be recorded is fed to the cutting head at half of its regular playback speed.
CNC plasma cutting Plasma cutting performed by an industrial robot. Plasma cutting is a process that cuts through electrically conductive materials by means of an accelerated jet of hot plasma. Typical materials cut with a plasma torch include steel, stainless steel, aluminum, brass and copper, although other conductive metals may be cut as well.