. Railway mechanical engineer . Broken Drill Ready for Application in Chuck November, 1921 RAILWAY MIXUANICAL ENGINEER 719 Bronze-Faced Dri\ ing Box Shoes and Wedges WHAT promises to work important changes in methodsof maintaining locomotive driving box slnxS andwedges, effecting important savings in maintenancecosts, is the development of bronze-faced semi-steel castingsby the Standard Semi-Steel Foundry Company, Clinton, and wedge castings have been made of this material inwhich the bronze faces proved to be .SO per cent harder than. Semi-Steel Shoe and Wedge With Bronze Faces Outlin
. Railway mechanical engineer . Broken Drill Ready for Application in Chuck November, 1921 RAILWAY MIXUANICAL ENGINEER 719 Bronze-Faced Dri\ ing Box Shoes and Wedges WHAT promises to work important changes in methodsof maintaining locomotive driving box slnxS andwedges, effecting important savings in maintenancecosts, is the development of bronze-faced semi-steel castingsby the Standard Semi-Steel Foundry Company, Clinton, and wedge castings have been made of this material inwhich the bronze faces proved to be .SO per cent harder than. Semi-Steel Shoe and Wedge With Bronze Faces Outlined in Chalk ordinary bronze, the backs being made of semi-steel ap-proximately 50 per cent stronger than grey iron. The com-bination of these two metals affords valuable wearing prop-erties and the strength that is so essential in shoes andwedges. Bronze-faced shoes and wedges, such as are shownin the illustration, have been used for 16 months on twoimportant railroads with no difficulty being encountered due to the separation or loosening of bronze faces under theconstant hammering. Different railroads use different methods of handling shoeand wedge maintenance work. Some rivet brass plates to theshoes and wedges and others apply brass to the driving boxes,while in still other cases solid brass shoes and wedges areused. It has been found in the first two methods that theuse of bronze-faced shoes and wedges effects a large laborsaving and is extremely satisfactory, doing away with thepounding from loose liners as there has never been a
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
