The Science of Railways Volume 2

The Science of Railways Volume 2

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ...pins and axles, the allowance for the fit will be from 0.001 inch to 0.002 inch for each inch in diameter, depending on the condition of the surfaces, the trueness of the holes and the length and thickness of the hub. In putting pieces together by driving or forcing the surfaces must be well lubricated, otherwise they will cut and stick fast before reaching the proper position. Where pieces are to be fastened together by shrinkage the allowance is generally greater than for forced fits. For small work the allowance should be about 0.003 inch for the first inch of diameter, adding 0.001 inch for each additional inch. The allowance for locomotive tires is A inch per foot of diameter for wheel centers less than 66 inches in diameter, and 6 inch per foot of diameter for centers 66 inches and over in diameter, CHAPTER XX. MACHINE WORK--PLANER AND SHAPER WORK. For machining plane and irregular surfaces that may most conveniently be cut by a tool moving across the work in a straight line, the planer and shaper are used. The common form of planer is shown in Fig. 1. It consists of the bed a, the upper surface of which is provided with two V-shaped guide ways on which the work carrying table, or platen b, is moved back and forth in a straight line. This bed has two upright frames, or housings, c, firmly bolted to it, the front and side surfaces of which stand at a right angle to the line of travel of the platen b. These housings carry the cross slide or cross rail d to which is fitted the saddle e, carrying the head /, to which the tool is secured by means of the tool clamp g. The cross rail d is adjustable in a vertical direction by means of two vertical screws operated by the bevel gears on shaft m. This shaft is rotated by the handle n. To secure d at...
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Product details

  • Paperback | 60 pages
  • 189 x 246 x 3mm | 127g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236527887
  • 9781236527882