. American engineer and railroad journal . Powr ofDrill. Min. FeetperMin. AprxPerRev. InchsPer Miu. 20 Remarks. jn. 900 59 177 119 207 Cast Iron 1 thick. i 900 . i~ 9O0 12 J 900 013 12 3 1 455785 .0066 . 26 .9 1 ~i~ 900 Aluminum Engine Frames. H 14 holes in 25 seconds. 119-64 745 248 Aluminum case. Drilled from the solidBosses drilled and faced in 1 operation * Carbon steel drill; the others were all high speed steel box table. This machine is especially convenient in the drilling ofholeo in work which can be
. American engineer and railroad journal . Powr ofDrill. Min. FeetperMin. AprxPerRev. InchsPer Miu. 20 Remarks. jn. 900 59 177 119 207 Cast Iron 1 thick. i 900 . i~ 9O0 12 J 900 013 12 3 1 455785 .0066 . 26 .9 1 ~i~ 900 Aluminum Engine Frames. H 14 holes in 25 seconds. 119-64 745 248 Aluminum case. Drilled from the solidBosses drilled and faced in 1 operation * Carbon steel drill; the others were all high speed steel box table. This machine is especially convenient in the drilling ofholeo in work which can be conveniently moved beneath the spin-dle of the machine on a truck, or otherwise. It does away withconsiderable handling of the work and permits of its being movedfrom the drilling department to the next one with the least pos-sible delay. The arm is easily swung to the position desiredand the head readily set at any point along the arm. Where MOTOR-DRIVEN SENSITIVE RADIAL DRILL. November, 1000. AMERICAN ENGINEER AND RAILROAD JOURNAL. 459. THREE-CYLINDER SIMPLE LOCOMOTIVE, PHILADELPHIA & READING RAILWAY. the column in spite of the high speed of the spindle. The frictionsin the tapping attachment are of a patented type which cannotbecome disengaged of themselves, after once being thrown are of such large proportions as to transmit the maxi-mum power required. Adjustment for regulating the tension of the belts is arrangedfor both of the overhead belts and for those of the tapping at-tachment and motor drive. This drill will handle high speedtwist drills and standard taps up to I in. in diameter. Whenfitted with a tapping chuck, it is particularly well adapted for thetapping of small holes. These machines are manufactured byThe American Tool Works Company, of Cincinnati, Ohio. HYDRO-PNEUMATIC PIT JACK. The almost universal tendency to equip roundhouses and loco-motive repair shops with air pressure pipe lines was recognizedseveral years ago by the Watson-Stillman Company,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
