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Modern Drilling Practice

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Excerpt from Modern Drilling Practice: A Treatise on the Use of Various Type of Single and Multiple Sindle Drilling Machines, Including Their Application to Standard and Special Operations, the Relation of Speeds and Feeds to Intensive Production, and the Different Types of Tools and FixtuAll mechanics are familiar with the various types of drilling machines which are extensively used in machine shops. Bearing this fact in mind, it was felt that nothing beyond a brief descrip tion of the essential features of each type of machine would be of practical value. After this preliminary discussion of machine design, examples of good practice in operating each type of machine are illustrated and described. In this connection, complete information is given concerning the material, the Size of holes being drilled, the speed and feed at which the operation is performed, and the rate of production which is obtained. The examples selected Show operations which are conducted under conditions approximating maximum output and, as a result, should 'prove of value in suggesting conditions under which a new job may be successfully handled. No attempt has been made to take up the subject of jigs and fixtures beyond explaining certain fundamental points in their design and the essential features of equipments used in performing the partic ular operations which are described. The reason is that this subject has been considered of sufficient importance to warrant its treatment in a separate volume in which a full discussion is presented of various principles of jig and fixture design.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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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