Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 178
ical cutters or countersinks known as cherries, which are used in making bullet-moulds. On comparison, it may be said, the single-chamfered drill, Fig. 528, cuts more quickly than the double-chamfered, Fig. 522, but that the former is also more disposed of the two to swerve or run from itsintended… … to produce jagged or groovy surfaces, which destroy the circularity of the holes; the necessity for drill-ing the entire hole at once, joined to the feebleness of the drill-bow, limits the size of these drills. In using the single-chamfered drills it is customary, and on several accounts desirable,…
Mechanical engineering
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