Aviation engines; design--construction--operation and repair; (1919)
Pagé, Victor Wilfred, 1885-1947 · New York, The Norman W. Henley publishing co. · leaf 388
ngages with a suit-able opening in the collet, as the piece used to support Drills and Reamers 389 the drill is called. The object of this tongue is to relievethe tapered portion of the drill from the stress of drivingby frictional contact alone, as this would not turn thedrill positively and the… … Fig. 168.—Forms of Drills Used in Hand and Power Drilling Machines. dition. A small keyway is provided in the collet into whicha tapering key of flat stock may be driven against theend of the tongue to drive the drill from the spindle. Astandard taper for drill shanks generally accepted by…
Airplanes
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