Railroad Shop Practice: Method and Tools

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McGraw-Hill book Company, Incorporated, 1921 - Railroad - 331 pages
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Page 302 - Car-journal bronze is used for making car and coach bearing backs at the Altoona brass foundry, by melting down old backs after removing the linings and making the necessary addition of new metal to bring the composition within the limits given in the table. No new tin is added in making this alloy. Special high-lead bronze is used principally for locomotive drivingbox shells, which are not lined. The lead-base lining for car-journal bearings was formerly made up in our foundry from lining metal...
Page 302 - Phosphor-bronze is used principally for rod bushings; main rod brasses; and crosshead shoes. Extra B bronze is to a small extent used for the backs of car and coach bearings, but the majority of these are now made of the carjournal bronze, which contains, on the average about 5% of tin. Car-journal bronze is used for making car and coach bearing backs at the Altoona brass foundry by melting down old backs after removing the linings, and making the necessary addition of new metal to bring the composition...
Page 302 - ... backs after removing the linings, and making the necessary addition of new metal to bring the composition within the limits given in the table. Special high-lead bronze is used principally for locomotive driving-box shells, which are not lined. Dandelion metal is used for lining crosshead shoes, and for lining engine truck and trailer bearings, as well as for hub liners, in place of phosphor-bronze on freight locomotives. Bell-metal is used exclusively for making locomotive bells, and during...
Page 108 - The platen has in the center a hole llj^ in. in diameter, for chips to drop into and also to clear the boring bar and tool. The detail B shows the main sliding jaws of the chuck; there are two such and they are moved apart or together up against the sides of the driving box, which are next to the driving-box shoes. These two jaws are planed on the bottom on two places 4 in. wide and 1 in. high. They are then beveled at a...
Page 109 - ... order to bore more or less out of the part that rests on the axle. One of these blocks has to be taken out when the box is put on the machine or removed therefrom. That operation is easy, owing to the block being shorter than the part that moves it in against the box. When all jaws and...
Page 7 - ... the personal skill of the workmen, who must still hold the tools to the work and guide them properly for drilling and chipping cuts and for riveting blows.
Page 302 - Extra bearing bronze is used to a small extent for backs of car and coach bearings, but most of these are now made of the carjournal bronze, which contains on the average about 5 per cent tin.
Page 302 - Tin-base babbitt metal (88.9 tin, 3.7 copper, 7.4 antimony) is used for a number of purposes in the shops, but its use has been greatly restricted, and every effort is being made to do away with it where possible, and to substitute a lead-base babbitt or a babbitt with 50 per cent tin. The amount of solder having the composition 50 lead, 50 tin, used by the Pennsylvania...
Page 6 - Sacramento. brawn of arm are quite as essential as in the day when machine tools were largely unknown.
Page 263 - The mustration is practically self-explanatory, but it may not be out of place to call attention to one feature, the height to which the guard rails are extended above the floor.

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