. Hardware merchandising March-June 1915 . at coarser or finerteeth as may be required. Teethmay he cut with any pitchdesired. A V shaped tooth,with no pitch whatever, is usedin perforating paper. The cross-cut tooth is nearest to this, havingbut a slight pitch. The compassand pruning saws lean farther towhat is called compass rip saw teeth have the faceat right angles to the back. Various trimming operationsnow take place, such as hollowingthe back, squaring the smaller in-dentation to break the long line ofthe back. The heel is rounded alittle to protect the workman. Aslight breast
. Hardware merchandising March-June 1915 . at coarser or finerteeth as may be required. Teethmay he cut with any pitchdesired. A V shaped tooth,with no pitch whatever, is usedin perforating paper. The cross-cut tooth is nearest to this, havingbut a slight pitch. The compassand pruning saws lean farther towhat is called compass rip saw teeth have the faceat right angles to the back. Various trimming operationsnow take place, such as hollowingthe back, squaring the smaller in-dentation to break the long line ofthe back. The heel is rounded alittle to protect the workman. Aslight breast or bow is sometimesgiven to the teeth where most ofthe cutting takes place. The saw has now its properform, but it is soft. It has beeneasy to work, but is useless as atool. The next change must there-fore he made in the steel—a new arrange-ment of the molecules. This is accom-plished by the hardening and temperingprocesses. First the saws are heated to cherryred in a hot oven and plunged suddenlyinto an oily liquid. Some new diisposi-.
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Keywords: ., bookcentury1900, booksubjectbu, booksubjectimplementsutensilsetc
