Duplex slide-rest. A feed motion in which there are two slide-rests in one slide-way.
Dutchman. A piece let in to restore a worn part, or to hide a defect.
E
Edge-moulding machine. A machine for dressing the edges of wood-work to shape, and usually for forming a moulding thereon.
Emery grinder, or emery-grinding machine. A machine in which emery wheels are used to grind the work.
Emery wheel. A wheel composed of emery cemented together under pressure.
Endless screw. A short length of screw formed to drive the teeth of a worm wheel.
End-mill. A milling-machine cutter, having teeth on its end face.
Engine-lathe. A lathe having a feed motor for the cutting tool.
Epicycloid (ĕp-i-sī′-kloid). A cycloidal curve in which the rolling circle is rolled outside the fixed or base circle.