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The first book is Manual of Screw Cutting 4th edition (1887) containing rules for calculating the change gears on screw-cutting lathes to cut square and angular threads per inch or per pitch, with two or four gears. Also, useful rules for calculating the diameters and speeds of pulleys. This book will help you make all the necessary calculations in order to cut the screw with the required number and type of threads. The second book is Change-Gears from 1935. This portion explains how to calculate auxiliary change-gears for cutting special threads or pitches not within the range of the regular quick-change gear-box - a method of utilizing various settings of the gear-box to avoid using special auxiliary gears. If you have any questions please e-mail me. (We do not proofread any ads submitted by members) |
C_johnston@desmoines-classifieds.com (Corey Johnston) for more information. Your emails will be instantly forwarded to the poster's private address.
