. Railway mechanical engineer . HAIN BY A. G. JOHNSONMechanical Engineer, Duluth & Iron Range In removing and applying the Westinghouse 8^-in. cross-compound aircompresor, the chain shown in the illustration (Over) Where a record of this nature is kept it may be consultedto show the entire histor\ of the tool. As an illustration,take the case of stavbolt taps. A lot made may wear toorapidly when in service. The card index covering the tapsin question mav be consulted and the probable cause of thedefect determined. This may show a scleroscope hardnessbelow 65, indicating that too high a heat wa
. Railway mechanical engineer . HAIN BY A. G. JOHNSONMechanical Engineer, Duluth & Iron Range In removing and applying the Westinghouse 8^-in. cross-compound aircompresor, the chain shown in the illustration (Over) Where a record of this nature is kept it may be consultedto show the entire histor\ of the tool. As an illustration,take the case of stavbolt taps. A lot made may wear toorapidly when in service. The card index covering the tapsin question mav be consulted and the probable cause of thedefect determined. This may show a scleroscope hardnessbelow 65, indicating that too high a heat was used whendrawing the temper or other causes. If some of the lot ofthese ta°ps are on hand that have not been used, they may berehardened and drawn to the correct degree of after the second treatment, the taps hold up in a satis-factory manner it will be an indication that the correcthardness has been arrived at, which would then be a subject of record. A record made of tools purchased, such as the name,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
