. Electric railways; a treatise on the modern development of electric traction, including practical instruction in the latest approved methods of electric equipment and operation . rack. On high-speed cars the falling-out of pieces of flange may be a serious matterand result in a wreck. Steel-tired wheels have a hub .and spokeseither of cast or forwd steel or iron. On to this wheel a steel tireis shrunk. The tire is lieated in a furnace built for the j)urpose,and is then slipped over the wheel. It is made just such a sizethat it will slip over the wheel when hot, and when it is cool itwill shr
. Electric railways; a treatise on the modern development of electric traction, including practical instruction in the latest approved methods of electric equipment and operation . rack. On high-speed cars the falling-out of pieces of flange may be a serious matterand result in a wreck. Steel-tired wheels have a hub .and spokeseither of cast or forwd steel or iron. On to this wheel a steel tireis shrunk. The tire is lieated in a furnace built for the j)urpose,and is then slipped over the wheel. It is made just such a sizethat it will slip over the wheel when hot, and when it is cool itwill shrink enough to make a very tight fit. When the tire is to beremoved after it is worn out, it is heated until it has expanded suffi=ciently to drop off. M ELECTRIC RAILWAYS An axle for eleviited car is sliown in Fij^. 47. Wlioii cast-iron wheels are worn to an inijn-oper sliape or liaveflat spots npon thcni, dne to the sli(lin<i; of the wheels with the brakesset, an emery wheel n;nn(ler nmst be used to grind them down,as nothint; else is hard enon<di to have any elTect on the iron. D/ame/er of ch/7/rno/c/s for 33whee/s fo6e 33j for 30 whee/sfo he 30g measured on //neA-B. Fig. 48. Standard M. C. IJ. Flange. When steel-tired wheels are worn, they can be pnt in a latheand the snrface of the tire tnrned olf, as this snrface is of metal softeirou<:;h to be work<U)le witli ordinary tools. The types of wheel tread and wheel flanf^e in use vary greatlyamong different electric railways. There is a standard ^Master Car
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