Articles on CNC machining
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Milling is a machining operation in which a workpart is fed past a rotating cylindrical tool with multiple cutting edges (occasionally, a tool with one cutting edge, called a fly-cutter, is used). The axis of rotation of the cutting tool is perpendicular to the direction of feed.
A machining center is a highly automated machine tool capable of performing multiple machining operations under computer numerical control (CNC) in one setup with minimal human attention.
The wrought alloy designation system consists of four numerical digits, sometimes preceded by a capital letter. The first digit indicates the principal alloying elements, as described next; the second digit is the variation of that alloy; and the last two digits represent the specific alloy designation.