. American engineer . Special Header /or 4Heading Machine. 1^ Z^ Diam. 1^ Se^uart ~WJX f ll ;4 i—i -Jl-J. k#hI V-iiA ing Machine Dies for Making Grease Plugs; Boston& Albany. pound made of cyanide and salt that takes only 3 hours to case-harden -and although it is not 1/16 in. deep, it is enough. J. T. McSweeney (B. & O., Baltimore, Md.) :—Saltpeter isthe quickest thing to case-harden with. H. E. Gamble (P. R. R., Altoona. Pa.) :—We are still usingfrom 3 to 14 hours for case-hardening; it depends largely onthe bulk to be hardened. We are not using bone, but find thata salt
. American engineer . Special Header /or 4Heading Machine. 1^ Z^ Diam. 1^ Se^uart ~WJX f ll ;4 i—i -Jl-J. k#hI V-iiA ing Machine Dies for Making Grease Plugs; Boston& Albany. pound made of cyanide and salt that takes only 3 hours to case-harden -and although it is not 1/16 in. deep, it is enough. J. T. McSweeney (B. & O., Baltimore, Md.) :—Saltpeter isthe quickest thing to case-harden with. H. E. Gamble (P. R. R., Altoona. Pa.) :—We are still usingfrom 3 to 14 hours for case-hardening; it depends largely onthe bulk to be hardened. We are not using bone, but find thata salt and soda mixture is giving good results. T. E. WilHams (C. & N. W., Chicago, 111.) :—We use granu-lated bone in our case-hardening altogether. We have tried outseveral compounds, and have not had the success that we havehad with bone. We charge our box at night, and the nightwatchman takes care of it. FORGING MACHINES, DIES AND FORMERS \\. Stock ( M. C, Jackson, Mich.) :—It is not a question ofhow many dies a man develops, but how useful
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
