NCNumerical Control. A form of programmable automation in which the machine tool is controlled by punched tape. NC code contains a program of instructions and commands, which consists of numbers, letters, and other symbols. See also CNCCADCAMComputer Assisted Manufacturing. In general, CAM uses a computer to assist in any or all phases of manufacturing. But more specifically CAM in the machine shop deals with automatic programming of CNC machinery. See also CAD
A machine that reads punched cards into a computer.
1) A point around which anything revolves or rotates.
2) In the machine shop this often refers to a centering device usually affixed to the tailstock of a lathe, which is used to support a work piece with a pre-drilled center hole. The center and the pre-drilled hole have 60 degree included angles. The center usually has a Morse taper on the opposite end for snug fitting into the tailstock. Live-centers have ball bearings for rotation. Dead centers do not rotate and require lubrication. The top image is a dead center. The bottom image is a live-center.
Center cutting end mill
An end mill that is capable of axial as well as radial cut. Two opposing cutting flutes are so close together that the mill can act as a drill. Below left is a center cutting end mill. Below right is a hollow coolant-flow end mill capable of side cutting but not down cutting.
To bevel an edge. This can be a straight edge, curved edge, or a hole.
Tool used to measure the width of chamfers/countersinks at the top of a hole.