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Excerpt from Lathe and Planer Tools While the power required to cut is increased greatly by dullness of the cutting edge, we must avoid the wood chisel edge, because time lost in constantly removing the tool for grinding purposes eats up the profit. In Fig. 9 are illustrated two extreme cases - that on the left, too great top rake, and the other, without any. The one will do good work for a few minutes, provided the cut is not too heavy, but the wear of the edge is so great that the angle will soon become blunt, and it would be very much better to have no top rake at all. On the other hand, the cutting wedge, as I will call the tool shown at the right, is too blunt to do good, clean work, and from the position in which it is set, the chip will come off nearly straight and in small pieces. The happy medium between the two is indicated in Fig. 10. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from Measuring Tools No. 7. Lathe and planer Toms - Cutting Tools for Planer and Lathe; Boring Tools; Shape of Standard Sh0p Tools; Forming Tools. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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This work was originally published as four separate books; their titles, and reviewers' comments, are given below: History of the Gear-Cutting Machine: A Historical Study in Geometry and Machines "The book represents an overwhelmingly well-done job of reducing a great mass of material—scholarly references, patents, catalogs, engineering and trade journals, and machines themselves—into a logical story of development. Written with zest and relish, this vivid account presents a wealth of unusual information. The illustrations are particularly good, for many of them come from previously untapped sources." —Technology and Culture History of the Grinding Machine: A Historical Study in Tools and Precision Production "From the polished artifacts of prehistoric times Mr. Woodbury traces the development of methods, abrasives, and the machine tools which interdependently contributed to the advanced grinding techniques used today. Many fine illustrations." —The Tool Engineer History of the Milling Machine: A Study in Technical Development "Mr. Woodbury traces the evolution of milling machines from Eli Whitney's machine (circa 1820), the first miller ever built, to numerical controlled milling machines.... presented cleanly with ample detail. Fine illustration and complete bibliography are provided." —The Tool Engineer History of the Lathe to 1850: A Study in the Growth of a Technical Element of an Industrial Economy "Woodbury, who teaches the history of technology at the Massachusetts Institute of Technology, is at work on a history of machine design which promises to alter our perspectives not only in his special field but in general cultural history.... His present history of the lathe (to about 1850) absorbs the entire previous literature and goes far beyond it." —Lynn White, Jr.
Excerpt from Report on Machine-Tools and Wood-Working Machinery Sir: I have the honor to transmit herewith the report of Mr. F. R. Hutton, special agent of the Census, on Shop-tools, Wood-working Machinery, etc. The two features of greatest interest and importance in American manufacturing industries are the development and general introduction of the principle of interchange-ability in the parts of machines and implements manufactured and employed in the country, and the gradual introduction into our machine-shops and factories of special tools for preparing and shaping materials for the special uses which they are to subserve, either as parts of such machines or implements, or for general use. These two branches or lines of development are closely related to each other, and have exercised an immense influence in the rapid growth of our national interests. It may be said of both that they had their origin in the characteristic inventive genius of our people, which has been wisely fostered by the national legislature through liberal patent laws enacted from time to time. Within the memory of men now living, a New England farmer has devoted his winter evenings to the making of wooden clocks, for sale, his implements being a knife, a file, and a saw; another has devoted himself, with the aid of his family, to covering buttons by hand; the modest products in each case going far toward the support of the family. The same processes are now accomplished, with slight changes in style and materials, on a large scale in extensive establishments provided with special tools which render hand-work almost unnecessary. These are mere instances to illustrate the changes that have taken place in every branch of human labor through the introduction of special devices now employed in manufacturing. In the treatment of the materials which form the heavier metallic parts of engines and other machinery, and all varieties of wood-work, the advance has been no less remarkable. Operations now performed at small cost in preparing such materials for use would have been found impossible a few years ago by mere hand-work, or would at least have been impracticable on account of the great expense involved. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from Machine Tool Operation, Vol. 2: Drilling Machine, Shaper and Planer, Milling and Grinding Machines, Spur Gears and Bevel Gears The preface of Part 1 gives the reasons for preparing this text. Part 1 deals with lathe work, bench work, and work at the forge. An attempt has been made in this volume (part II) to organize the fundamea principles of construction and operation of the Drilling Machine, Shaper, Planer, Milling Machine, and Grinding Machine. A chapter embodying what every machinist should know concerning spur gears and bevel gears is included. Only fundamentally has this work anything to do with production. Special rapid production machines and tools represent various combinations of fundamental mechanisms, methods and processes. The purpose of this text is to discuss these fundamentals, and build a foundation for rapid production; the same sort of foundation that arithmetic builds for mathematical calculations. Perhaps a statement regarding the way in which the follow ing text is presented and the reasons therefore should be made here. First: While there are a great many sizes, types, and kinds of each of the standard machine tools, and while the makers differ in details of design, the fact remains that the primary function, and the basic principles of construction and opera tion of the given class of machine, are the same regardless of the size or where it is made. Therefore, a well-known example of each of the machine tools under discussion has been selected and described, and typical mechanisms illustrated and explained in such a way as to bring out the general details. Second: The operator's production, interest and progress are in proportion to his understanding of the basic principles of the construction of the machine he is running - the special mechanical features, feed changes, speed changes, and adjust ments of the machine. Consequently, these things have been discussed early in the study of the particular machine. Third: The broader the student's knowledge concerning the cutting tools used in the given machine, and the quicker he gets a fairly comprehensive idea of the shapes, sizes and characteristics of these tools, the easier and better he can run the machine. Therefore the cutting tools used have been explained in considerable detail. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.