Deep Hole Drilling (Classic Reprint)

Download or read book Deep Hole Drilling (Classic Reprint) written by Lester G. French and published by Forgotten Books. This book was released on 2017-07-17 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Deep Hole Drilling It is well known that a long, or deep, hole - that is, one long in proportion to its diameter - is best roughed out and finished by using a tool on the end of a long bar which enters the work from one end. This is true, whether drilling into solid metal, or boring and reaming a hole that has already been drilled or bored out. A boring bar which extends through the piece, and on which is either a stationary or a traveling head, is not satisfactory for very long work, owing to the spring and deflection of the bar, which is made worse by the fact that the bar must be enough smaller than the bore to allow room for the cutter head. While a long hole may sometimes be finished satisfac torily by means of such a boring bar, by packing the cutter head with wooden blocks which just fill the part of the bog that has been ma chined, and so support the bar, the method is fundamentally incor rect for long work. 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.