. Railway mechanical engineer . am nuts are reamed and tapped on a turret lathe and nofurther finishing is necessary. Spring steel is used for making S-wrenches. A suit:-able die and punch are made to form the ends and enoughstock is left in the center of the wrench to draw it out underthe steam hammer to the required length. The ends arepunched to the proper size for the nut, and the wrench isbent in a former. These wrenches are strong and light andgive very good service, being distributed over the entiresystem for all classes of work. DISCUSSION The use of tire steel as a substitu
. Railway mechanical engineer . am nuts are reamed and tapped on a turret lathe and nofurther finishing is necessary. Spring steel is used for making S-wrenches. A suit:-able die and punch are made to form the ends and enoughstock is left in the center of the wrench to draw it out underthe steam hammer to the required length. The ends arepunched to the proper size for the nut, and the wrench isbent in a former. These wrenches are strong and light andgive very good service, being distributed over the entiresystem for all classes of work. DISCUSSION The use of tire steel as a substitute for carbon tool steelis considered satisfactory in many cases, but opinions varyas to the extent to which the substitution can successfullybe made. It has been used successfully for shear blades, the material receiving the same heat treatment that wouldbe accorded to carbon tool steel, viz., a quenching tempera-ture of about 1,450 deg. F., the blade being quenched fora distance of about two inches back from the cutting 3$ -£=4 \pour Botbbithere
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
