Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 176
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 doub.p-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…
Mechanical engineering · Mechanics · Engineering
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