Excerpt from Bearings and Their Lubrication The aim of this book has been two fold; to present the underlying principles involved in the design of all classes of machinery bearings and to show modern practice in the construction and application of important commercial types. It is believed to be the first treatment of these subjects ever put into book form. The tendency of modern machine design in many fields is toward the use of high speed shafts and spindles and friction reducing forms of bearings. Therefore the present seems a peculiarly fitting time to present these data with the purpose of making them permanently useful to engineers, designers, draftsmen and machinists; in fact to any one who is interested in any way with machinery bearings and their proper lubrication and care. Many of the data have never before been published in any form. Many of the experiments and researches quoted are from European sources and official transactions of technical societies and are not generally known to American readers. It is a pleasure to acknowledge the many courtesies received from engineers and machinery manufacturers and the valuable information furnished by them. Without this hearty cooperation it would have been impossible to have produced this 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.