Online Catalogue last updated 17th of September 2023
First published by the Cleveland Twist Drill Co.
Learn about the parts of a twist drill, tips on grinding of sharpening, correct feeds and speeds, tips on drilling hard materials, brass, use of cutting compound, and more. Chapter 5 covers common errors and their results, including broken tangs, how to "drift out", using a lead hammer, warming high speed drills before using, and more. You'll find tables of feeds and speeds for drills from the tiniest numbered drill to 3" diameter drills with morse taper shanks. Finally you'll discover several pages of advertising promoting Cleveland Twist drills, reamers, counterbores, end mills and more.
This eleventh edition from 1925 was intended to teach machinists the underlying theory of twist drills. You'll find it just as useful as they did!
Code No. 001916, 48 pages, $9.00