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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.
Important for the good surface quality is the asymmetrical design of the deep hole drilling tools. The "classical" tools for single-lip deep hole drilling, BTA deep hole drilling and ejector deep hole drilling are, with a few exceptions, designed asymmetrically and have a secondary cutting edge (circular grinding chamfer) and guide pads.
Rotary saw or "spiral-cut saw" or "RotoZip": for making accurate cuts, without using a pilot hole, in wallboard, plywood, and other thin materials. Electric miter saw or "chop saw," or "cut-off saw" or "power miter box": for making accurate cross cuts and miter cuts. The basic version has a circular blade fixed at a 90° angle to the vertical.
In radio-frequency engineering and communications engineering, a waveguide is a hollow metal pipe used to carry radio waves. [1] This type of waveguide is used as a transmission line mostly at microwave frequencies, for such purposes as connecting microwave transmitters and receivers to their antennas, in equipment such as microwave ovens, radar sets, satellite communications, and microwave ...
The city saw tremendous industrial and population growth during the 19th century and early 20th century, and experienced racial tension and urban decline in the second half of the 20th century, culminating in the 1967 Newark riots, which led to an increase in white flight, with 100,000 white residents leaving the city in the 1960s, though the ...
A harbor-deepening project was completed, [156] which makes the Port of Charleston's entrance channel a depth of 54 feet (16 m) and harbor channel 52 feet at mean low tide. With an average high tide of 6 feet (1.8 m), the depth clearances will become 60 feet (18 m) and 58 feet, respectively.
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