Aviation engines; design--construction--operation and repair; (1919)
Pagé, Victor Wilfred, 1885-1947 · New York, The Norman W. Henley publishing co. · leaf 390
391 count of conforming to the wire gauge standards. Num-ber drills do not usually run higher than 5Ae inch indiameter. Beyond this point drills are usually sold bythe diameter. A set of chuck drills, ranging from % to% inch, advancing by %2 inch, and a set of Morse tapershank drills ranging from %… … Fig. 169.—Useful Set of Number Drills, Showing Stand for Keeping Thesein an Orderly Manner. number of large drills in stock that would be used veryseldom, perhaps not enough to justify their cost. In grinding drills, care must be taken to have thelips of the same length, so that they will form the…
Airplanes
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