. American engineer and railroad journal . O. B. standard of 33% ins., measured at a point 2% ins. fromoutside of tread of wheel. J. Wheels of the same normal diameter must not vary more than one-fourth 1 1 I of an in. ai»i\ ■ below the mean sizi measured on the circumference, and the same wheel must not van more thanone-sixteenth 1 1 16) of an in. in diameter. The body of the wheelmust be .smooth and free from slag, shrinkage or blowholes. TheHead must be free from deep and irregular wrinkles, slag, chillks and sweat or beads in throat, and swollen rims. .,. The wheels must show clean gray ir
. American engineer and railroad journal . O. B. standard of 33% ins., measured at a point 2% ins. fromoutside of tread of wheel. J. Wheels of the same normal diameter must not vary more than one-fourth 1 1 I of an in. ai»i\ ■ below the mean sizi measured on the circumference, and the same wheel must not van more thanone-sixteenth 1 1 16) of an in. in diameter. The body of the wheelmust be .smooth and free from slag, shrinkage or blowholes. TheHead must be free from deep and irregular wrinkles, slag, chillks and sweat or beads in throat, and swollen rims. .,. The wheels must show clean gray iron in the plates, exceptal chapletS, where mottling to not more than ( V2 1 same will be permitted. The depth of pure white iron mustiiii exceed one il 1 in. nor be less than one-balf 1 ji in. in the middle of the tread, and shall not be less than thi -eighths in. in the throat, for wheels weighing six hundred (600) lbs. Ii 4 l * usee *v/r« wsolts o* ntvEreo ho re THiS ClSrtHG SHOULO HOT excess c> t-ms ./* weight.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
