Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . BSS:iJ5iiiiJ^!. portance when pening has to be performed upon finished work, because, if the marks sink deeply,proportionately more grinding or filing is required to efface them; and for this reason the force ofthe blows should be as near equal as possible. Another and a more important reason, however, isthat the effect of the pening does not penetrate deeply; and if much of the pened surface is re-moved, the effects of the pening will be also removed; for, as a rule, the immediate eff
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . BSS:iJ5iiiiJ^!. portance when pening has to be performed upon finished work, because, if the marks sink deeply,proportionately more grinding or filing is required to efface them; and for this reason the force ofthe blows should be as near equal as possible. Another and a more important reason, however, isthat the effect of the pening does not penetrate deeply; and if much of the pened surface is re-moved, the effects of the pening will be also removed; for, as a rule, the immediate effects of theblows do not penetrate deeper than about one-thirty-second of an inch. While the work is beingpened, it should be rested upon a wood or a lead block, and held so that the part struck is supportedas much as possible by the block. In no case should it be rested upon an iron or any hard-metalblock, as that would tend to stretch the under face, and partially nullify the effects of the pening. In straightening work of cast-iron, pening bears an important part, especially in the case of ironpatterns or light iron c
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Keywords: ., bookauthorbenjaminpark18491922, bookcentury1800, bookdecade1880
