File:Railway mechanical engineer (1916) (14738470706).jpg

Identifier: railwaymechanica96newy (find matches)
Title: Railway mechanical engineer
Year: 1916 (1910s)
Authors:
Subjects: Railroad engineering Engineering Railroads Railroad cars
Publisher: New York, N.Y. : Simmons-Boardman Pub. Co
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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of bent under-frames will show the weakest point of the car is just behindthe bolster on the bottom of the sills. This is due tothis point being under compression, due to the direct verticalload, also due to the impact on the end of the car. If thecenter line of draft cannot be put upon the center line ofsills, it would be belter to put it a little above than below. Some designers are attempting to design the draft gear andattachments so that they can oe easily taken down and in-spected and repaired, but some roads do not seem to appre-ciate the benefit of keeping the draft gears in repairs. Ibelieve that taking out the slack, which is bound to be pro-duced by bending of parts after the draft gear goes solid,should be practically carried out; in this way we would beable to materially reduce the uncontrolled slack in opera-tion of cars as, in my opinion, there is a marked differencein uncontrolled slack of a long train and draft sear travel. Tr-NE. 192J RAILWAY MECHAXICAL ENGINEER 343
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344 RAILWAY MECHANICAL EXGINEFR Vol. 96, No. 6 Heavy Duty Boring and Turning Mill MANY improved features have been incorporated in thenew line of boring mills, manufactured by the Col-bum Machine Tool Company, Cleveland, Ohio,making these machines powerful yet easy to control andtherefore well adapted for use in railroad shops. The ma-chines are made in sizes from 36-in. to 84-in. swing inclusive, thefollowing description pertaining tothe 42-in. mill which is repre-sentative. The actual swing of the 42-in.mill is 44 in., 36 in. under thecross rail and 41 in. maximumdistance between the table and low-er face of the turret. The tableis 40 in. in diameter cast solid(not cored underneath) and pro-vided with both parallel and radialT-slots. The table spindle has achilled cast-iron angular bearingof large diameter at the top whichmakes it self-centering. This, incombination with the large verticalbearings, effectively resists all toolthrusts and strains. Two swivelheads can be provided as s

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