. The 20th century toolsmith and steelworker; a complete, practical, and scientific book. Fig. 88. The left hand bent cutting off Fig. 39. The right hand bent cutting off tool. cording to the cutting edge, as illustrated by dottedlines in Figures 36 to 45, and tempered to a dark strawor copper color. But should the tools have to cut veryhard cast iron or other very hard material, harden anddraw no temper. Should the tool still fail to cut the TOOLSMITH AND STEELWORKER 93 metal, use equal parts of powdered cyanide of potas-sium and prussiate of potash. To use this compoundheat the tool a
. The 20th century toolsmith and steelworker; a complete, practical, and scientific book. Fig. 88. The left hand bent cutting off Fig. 39. The right hand bent cutting off tool. cording to the cutting edge, as illustrated by dottedlines in Figures 36 to 45, and tempered to a dark strawor copper color. But should the tools have to cut veryhard cast iron or other very hard material, harden anddraw no temper. Should the tool still fail to cut the TOOLSMITH AND STEELWORKER 93 metal, use equal parts of powdered cyanide of potas-sium and prussiate of potash. To use this compoundheat the tool as hot as if it was to be hardened, thenplace the heated, cutting edge of the tool into the pow-der, reheat again to a proper hardening heat andplunge into the hardening bath and cool off entirely.
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Keywords: ., bo, bookcentury1900, bookdecade1900, bookid20thcenturytools01holf
