. The Street railway journal . tect blow holes or defects in cast-ing of any kind. We advise the heaviest, thick-est flanges possible to use on any specific road. We use the best No. 3 and No. 4 Northernand Southern charcoal irons with a certain per-centage of cold blast iron, which is much moreexpensive than hot blast iron, but gives greattoughness to the mixture. The Nos. i and2 irons frequently used in wheel manufactureshow a soft and open grain and make wheelsthat are strong, but have not good wearing qual-ities. ^ We take great care in selecting our cokesused in the melting. Poor coke con
. The Street railway journal . tect blow holes or defects in cast-ing of any kind. We advise the heaviest, thick-est flanges possible to use on any specific road. We use the best No. 3 and No. 4 Northernand Southern charcoal irons with a certain per-centage of cold blast iron, which is much moreexpensive than hot blast iron, but gives greattoughness to the mixture. The Nos. i and2 irons frequently used in wheel manufactureshow a soft and open grain and make wheelsthat are strong, but have not good wearing qual-ities. ^ We take great care in selecting our cokesused in the melting. Poor coke containing sul-phur is unsuitable, as the iron takes up the sul-phur. The iron is poured rapidly and at a veryhigh temperature and the wheels are left in theannealing pits for four or five days. Test barsare made with every wheel so that the depth ofa chill can be ascertained and recorded. We proportion every part of the wheel soas to have a large amount of gray iron to carrythe chill and give strength and elasticity to FIG. 4.—SECTION OF 385 LB. 33 IN. WHEEL. The wheels are carefully ground, preferablyafter mounting on the axles. This mounting isa service which we will perform in our ownshops if desired, as we consider the proper fit-ting of wheels upon axles to be a matter ofgreat importance. The wheels are cast so close- October, 1896.] STREET RAILWAY JOURNAL. 189 ly to a true circle that not more than jV, ever taken off our wheels in the grinding, andthe amount is usually much less, so that thechill is not in the least affected by this opera-tion. The illustrations given herewith show someof our wheel sections most commonly ordered. Fig. I is a 38s lb. 11 in. wheel used by theCincinnati, Newport & Covington RailwayCompany. It has a 21-2 in. tread and a -^k \l in. wide. The total width of rim,including flange and tread, is 3/= ins. and it hasa thickness of i :a ins. Fig 2 shows a 100 lb. 10 in. electric motorwheel used in Topeka, Montgomery and else
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
