Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . feed, with the cutting edge of the tool ground flat so as to leave the surface of the work level, theedge of the tool is under cutting duty during a minimum of time, and hence preserves its cuttingedge longer in proportion to the duty. And since the cutting edge is better preserved, it follows thatthe finished work will be more nearly parallel. This principle applies more particularly to cast ironthan to wrought iron or steel, because there is less strain in severing that metal.
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . feed, with the cutting edge of the tool ground flat so as to leave the surface of the work level, theedge of the tool is under cutting duty during a minimum of time, and hence preserves its cuttingedge longer in proportion to the duty. And since the cutting edge is better preserved, it follows thatthe finished work will be more nearly parallel. This principle applies more particularly to cast ironthan to wrought iron or steel, because there is less strain in severing that metal. In planing ma-chines the speed usually varies between 15 and 18 feet of cut per minute, and the feed for the firstcuts is from 10 to 20 traverses of the work to an inch of tool travel; but for finishing cuts the tooltravel is increased to from one-eighth to one-half inch per cutting traverse of the work, the broader78 274 LAUNDER. cuts being taken upon the larger sizes of work. In turning wrought iron, steel, or brass work, thesame principle holds good, but in a minor degree. Under all ordinary circumstances a
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Keywords: ., bookauthorbenjaminpark18491922, bookcentury1800, bookdecade1880
