. Official proceedings . Master Car Builders Treads and Flanges. Standard Tread SolidLine, Recommended Practice Dotted Line. miles per inch and 14,638 miles per 1-16 in. of wear. The causesof removal of these wheels were 3 pairs for worn treads. 3 pairsfor cut journals, i pair for a loose wheel, i pair for a thin flangeand 3 pairs for hollow and built-out flanges. At the time this 34 rrcccedines I^ailwav Club of blaster Car Builders Standard Tread and Flange. record was taken the remaining pair of wheels had not beenremoved. In the case of electric roads the wear in passenger ser
. Official proceedings . Master Car Builders Treads and Flanges. Standard Tread SolidLine, Recommended Practice Dotted Line. miles per inch and 14,638 miles per 1-16 in. of wear. The causesof removal of these wheels were 3 pairs for worn treads. 3 pairsfor cut journals, i pair for a loose wheel, i pair for a thin flangeand 3 pairs for hollow and built-out flanges. At the time this 34 rrcccedines I^ailwav Club of blaster Car Builders Standard Tread and Flange. record was taken the remaining pair of wheels had not beenremoved. In the case of electric roads the wear in passenger serviceruns about 6000 miles to the 1-16 in. of wear, and that is beingduplicated every day in regular service. Xow it is a very difficult thing to estimate mileage and costof freight car wheels because of the incomplete records that arekept in connection with that part of the work, but from the beststatistics available it appears that the mileage obtained fromcast iron wheels under 100,000 capacity cars is between 25,000and 30,000 miles. From the tests made of Schoen solid forgedand rolled steel wheels under postal cars on the PennsylvaniaRailroad it was found that there was obtained an average mile-age of 14,638 per 1-16 in., including wear and turning. Underheavy tenders, the mileage average 7000 per 1-16 in. of wearand turning. The average of these two figures, 10,800 milesper I-16 in. of wear and turning, may be tak
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