Engineers and Engineering Volume 3

Engineers and Engineering Volume 3

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1883 edition. Excerpt: ...the average lathe hand to make the "shrinking fits," instead of placing the latter in the hands of one or two first class machinists in the establishment, which is probably the practice in the majority of machine shops throughout the country. The gauge resembles, in miniature, an arm-swivel for a tension-rod, in which one of the bolt-ends contains a fine thread screw. The three screws have each a milled head jamb-nut, to maintain them in position when adjusted. To use the guage, the diameter of the hole in the wheel-hub, collar, coupling, or lever-boss, as the case may be, is first obtained by bringing the inside ends of the large screws in contact, and locking them securely with their respective jamb-nuts; then running the fine-thread screw out until it calipers or gauges the required distance; finally locking the last named screw. One of the large screws is now unlocked and moved away from the other a distance determined by placing between the inside points of the large screws, and jarnbing the same, a thin strip of metal, which is in reality the measure of the shrinkage or the difference by which the diameter of the shaft is to be greater than the diameter of the hole; the proportion by which these differences are made is obtained by experiment only, and varies with the sizes and materials. The gauge is well made; of steel, hardened where necessary; is light and easy to use, and has a complete set of shrink-measures, properly marked, for different diameters of shafts. Mr. Geo. Burnham, Jr., described a wood screw, in which the thread, instead of being cut, is formed by passing the blank through a series of rolling, working against stationery, dies. The first set forms a slight ridge only, the second deepens it, and so on...
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Product details

  • Paperback | 132 pages
  • 189 x 246 x 7mm | 249g
  • United States
  • English
  • black & white illustrations
  • 1236935527
  • 9781236935526