The mechanic's tool bookWith practical rules and suggestions for use of machinists, iron-workers and others . een the centers of a feed lathe in thesame manner as when it was turned, and screw upthe dead center so that the work will not rotateeasily upon its axis ; then place a sharp-pointedtool in the tool post of the lathe, and with thehand-wheel attached to the lathe-feed ran the pointof the tool along the surface of the spindle as faras the intended mortise is to be made ; then turnthe spindle or shaft between the centers until thetool-point will mark the opposite diameter of themortise, a
The mechanic's tool bookWith practical rules and suggestions for use of machinists, iron-workers and others . een the centers of a feed lathe in thesame manner as when it was turned, and screw upthe dead center so that the work will not rotateeasily upon its axis ; then place a sharp-pointedtool in the tool post of the lathe, and with thehand-wheel attached to the lathe-feed ran the pointof the tool along the surface of the spindle as faras the intended mortise is to be made ; then turnthe spindle or shaft between the centers until thetool-point will mark the opposite diameter of themortise, and run a line parallel with the first line ;by turning the spindle a half revolution, and re-peating the lines on the side presented to the tool-point, the outline of the opposite side of the mor-tise is made. There are many kinds of work in thin metal thatit is necessary to nicely finish up ; metal patternsfor foundery use may be mentioned as an example,and, often being thin and delicate, will not admitof being inserted in the vise to be held for manipu-lation. These may be operated as follows :—Fit a. Fig. 3. board or piece of hard wood in the lathe in such away that the line of the centers will be in the same 24 mechanics tool book. plane with the surface of the board. This can bedone by nailing two cleats upon the ends of theboard, the centers finding a bearing in the cleats ;then fasten the work to this board by means ofsmall nails, and as the file is applied it will oscil-late sufficient to present its surface properly tothe surface of the file, and by having the centersupon which the board hangs on a line with the sur-face of the work upon which the file is engagedthe work will have no tendency to rotate by theapplied force of the file. The methods by which the work can be held tothis tool for manipulation are various. Clampssimilar to those shown in Fig. 4 may be applied, orholes may be made in various positions, and thework can be held by the heads of screws which fi
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1868
