Cyclopedia of mechanical engineering; a general reference work. Editor-in-chief Howard Monroe Raymond. Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing (1908)
American School (Chicago, Ill.), Raymond, Howard Monroe · Chicago American Technical Society · leaf 156
These drillsare usually employed on heiivy work, where a number of hnlesare to be drilled. In the case of the drill shown in Fig. 163, the work la 116 MACHINE SHOP WORK. ordinarily light, and can be readily shifted so that the position ofthe holes can he brought beneath the drill. In heavy work,… … this. When the vertical spindle cariying the drill can [)c rotitedin the vertii^al plane, holes can be drilled, imt only in any jxisi-tion, but also at any angle. Such a drill is calle<l a UniversalUadial. The position of the holes is usually laid out for the guidanceof the man at the drUl. The…
Mechanical engineering
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