Excerpt from Automatic Screw Machine Practice, Vol. 3: Circular Form and Cut-Off Tools for the Brown and Sharpe Automatic Screw MachineIt is obvious that, as the condi-tiofis'¿fidér 3which the work is done and the limits allowed on it vafy be impracticable to lay down hard and fast rules in: mate, the application of circular tools, but the following suggestions will be found applicable to general conditions. At D, Fig. 3, is shown a method sometimes used to advan tage in making shouldered screws or other pieces of a similar char acter. This forming operation is not recommended when the piece to be made is required to be very accurate, as a slight eccentricity in the spring collet would cause the part f to be out of true with the part a. In cases where accuracy is required. The part a could be roughed down with the cut-off tool and a light finishing cut taken with a box-tool. At D, is shown an improved method of forming the same piece, as the form tool here removes the burr from the head.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.