. Illustrated catalogue and general description of improved machine tools for working metal . by hand ;—one turn of the nut serves to move the drill i end thrust is taken on a small hard step, which produces less frictional lossthan the collars ordinarily employed, and is more easily lubricated. A convenient gauge is provided for drilling or counterboring a number ofholes to a uniform depth, all handles are grouped so as to be most convenientto the operator, and the greatest care is taken to secure accuracy of workmanship. The tables, being raised and lowered by power, can be set to sui
. Illustrated catalogue and general description of improved machine tools for working metal . by hand ;—one turn of the nut serves to move the drill i end thrust is taken on a small hard step, which produces less frictional lossthan the collars ordinarily employed, and is more easily lubricated. A convenient gauge is provided for drilling or counterboring a number ofholes to a uniform depth, all handles are grouped so as to be most convenientto the operator, and the greatest care is taken to secure accuracy of workmanship. The tables, being raised and lowered by power, can be set to suit the lengthof the drill and the height of the work; thus obviating in most cases the use of thelong extensions which are required with fixed heads and fixed tables. \Vm. Sellers & Co., Incorporated, Philadelphia, No. 5. 13. 45 VERTICAL DRILLING MACHINE—with Circular Table. Overreach 22.} from centre of drill t Faplate. Circular table 32 diameter, carriedarranged to swing to one side to accommudtable, 24. Height of spindle-bearitig al)(>\Stroke, 17.}. Automatic power-feed adjll^l:quick hand traverse. All handles conveniecounter-bores, sample drill socket, ciumlershloose pulleys on countershaft, 10 diameterper minute. Largest lift of cone ]ndle\ on n ighl secured to slotted floor-and lowei-ed by power, andate. Vertical adjustment ofnueter of .steel spindle, 2.\linnigh a great range. \eriiished with depth-gauoe fi-ht-iron wreuches. 1-asl anshould make 110 revolutioi Wm. Sellers & Co., Incorporated, Philadelphia, Pa. Plate No. 6.
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Keywords: ., bookcentury1800, bookdecade1890, bookidillu, booksubjectmachinery
