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 71
66 AUGERS. 197. … quired to be applied to the machine, by which the rod is twisted in the helical curve. The next operationis to give the requisite degree of uniformity to the size and spread of the twist, which is accomplished byhammering in the machine, consisting of a trip-hammer, arranged and operated over a…
Mechanical engineering
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