. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . ?x. ■ ■ BLOOMING PASS40 x 90 ROUGHING PASS28 x 56 ROUGHING PASS28x60 Fig. 327. — Pass Diagram, Rail Mill, Illinois Steel Company, South Works. a stand, which is also in line with the roughing mill and driven by the samemotor, and continues on to the third stand of the 28-inch finishing mill, thisbeing the eighteenth and last pass. After the finishing pass the rail travelsthrough to the saws, of which there are five provided, thus cutting four rails tolength.

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. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . ?x. ■ ■ BLOOMING PASS40 x 90 ROUGHING PASS28 x 56 ROUGHING PASS28x60 Fig. 327. — Pass Diagram, Rail Mill, Illinois Steel Company, South Works. a stand, which is also in line with the roughing mill and driven by the samemotor, and continues on to the third stand of the 28-inch finishing mill, thisbeing the eighteenth and last pass. After the finishing pass the rail travelsthrough to the saws, of which there are five provided, thus cutting four rails tolength. These four rail lengths consist of half the ingot. As the capacity ofthis mill is 4000 gross tons per 24 hours, it will be seen that there must be afour-rail length sawed about every half-minute. The saws have 42-inchblades, arranged to be raised and lowered in unison by one controller fromthe hot-saw operator. The pass diagram of the rail mill at the South Works plant of the IllinoisSteel Company is illustrated in Fig. 327. The Bessemer ingot is 18 inches by INFLUENCE OF DETAIL OF MANUFACTURE 443

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Keywords: ., bookcentury1900, bookdecade1910, bookidsteelrailsth, bookyear1913