. Railway mechanical engineer . at the Chicago & North Western shops, Mis-souri Valley, Iowa. High speed steel of the smallest sizesmay be used until it is entirely worn away. The blacksmith can perform the entire operation. At thisshop an old scrap tire is worked out into tool shanks ofstandard sizes and the toolsmith drives his cutting-off chiselinto the end of the tool shank, making a V-shaped pocket,as shown in the illustration. A small piece of high speedsteel is then drawn out in wedge form and set into thepocket. The high speed steel wedge is firmly set in thepocket by a blow of the ham
. Railway mechanical engineer . at the Chicago & North Western shops, Mis-souri Valley, Iowa. High speed steel of the smallest sizesmay be used until it is entirely worn away. The blacksmith can perform the entire operation. At thisshop an old scrap tire is worked out into tool shanks ofstandard sizes and the toolsmith drives his cutting-off chiselinto the end of the tool shank, making a V-shaped pocket,as shown in the illustration. A small piece of high speedsteel is then drawn out in wedge form and set into thepocket. The high speed steel wedge is firmly set in thepocket by a blow of the hammer and a thin strip of copper. Tool Shank Ready for Piece of Inserted H. S. Steel is placed on top, the whole being placed in tlie fire andallowed to heat. When the temperature is raised suffi-ciently, the copper fluxes and runs down between the wedgeand the side of the V-shaped pocket, practically brazingthe wedge in place. After cooling and grinding, this toolmay be put to the most severe use on any heavy dut} ma-chine and will be found to give satisfactory service. In practical operation tools made in this way at the Mis-souri Valley shops have been used on driving wheel latheswith good results. Xot only does the tool stand up wellunder the work, but it is economical to use on account ofthe saving of small high speed steel bits which would other-wise be scrapped. Electric Weldlng for Shipbuilding.—A steel ship wasrecently launched in London which is the first to be con-structed without rivets, the plates being welded together bythe electric welding process.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
