. The Street railway journal . assed by its first cost of from $30to $40, is manifestly erroneously taken, as the center ofthe steel-tired wheel does not require renewing and shouldbe considered as a permanent feature of the truck. Worntires may be removed from it and replaced by new onesalmost indefinitely. It is only fair to assume that the cost of thecenter should be charged up to the truck investment and onlythe renewable feature, the tire, be considered in comparisonwith the cast-iron wheel. The center is practically indestructi-ble if made sufficiently strong for the service in the first
. The Street railway journal . assed by its first cost of from $30to $40, is manifestly erroneously taken, as the center ofthe steel-tired wheel does not require renewing and shouldbe considered as a permanent feature of the truck. Worntires may be removed from it and replaced by new onesalmost indefinitely. It is only fair to assume that the cost of thecenter should be charged up to the truck investment and onlythe renewable feature, the tire, be considered in comparisonwith the cast-iron wheel. The center is practically indestructi-ble if made sufficiently strong for the service in the first place,and serves as a permanent investment. The only additionalcost to be considered is that of removing a worn tire and re-placing it by a new one, but this is easily covered in the above-mentioned allowance of $4 per tire per 50,000 miles, for thisoperation, and each of the three turnings in the lathe. Evenif the expense of handling in the lathe and machining weredouble the above allowed amount, it may be seen that the cost. DETAILS OF NEW SOLID ROLLED AND FORGED STEEL WHEELS AS USED AT HARTFORD of operating the steel tires would even then be far below thatof using the chilled cast-iron wheel. The Hartford Company has recently introduced several ofthe new type of solid forged and rolled-steel wheels into serviceunder some of its double-truck interurban cars in order to makea trial of this interesting departure in wheel building. Thissolid steel wheel has many advantages to offer over thesteel-tired wheel, not only as to first cost, but also as to generalsimplicity and equal strength with less weight. On accountof the very thorough and effective methods of forging and roll-ing in manufacture, it is thought that a maximum of density is January 21, 1905.] STREET RAILWAY JOURNAL. 109 secured in the rim which will result in even longer wear thanis secured from the tires upon the steel-tired wheels. Whilethese new wheels have not been in service long enough as yet toallow of intel
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
