Albert Einstein once said:
“Things should be made as simple as possible, but no simpler.”
This book is an attempt to apply that principle to gear design by presenting information from a manufacturing point-of-view rather than a theoretical one. There are no great advances in gear technology described here. The topics discussed are all covered in greater detail in other books, some of which are listed in the “reference” section. The author hopes that this little volume will be of use to the occasional gear designer as a source of handy information and direction to more complete answers to the questions that arise during the design process.
After finishing this book in 1987 I vowed never to write another gear book. During the years since, however, I came to look at this little volume with a more critical eye and decided it needed just a little updating. What started out as a simple “scan it into the computer and make it look more modern” project grew into a major re-writing effort. I’ve tried to incorporate the lessons learned in 10 years of busy engineering practice at Milwaukee Gear and Pittsburgh Gear. I hope the additional figures and tables will be of value.
Despite the modern convenience of spell check, I’m sure there are a few typos left, and that a 3rd edition will be needed in a few years to correct them.1
1 Editor’s note: This document is a 2015 revision based on a scan of the 2nd Edition. All content has been preserved, but has been converted to PDF text and vector diagrams, along with new editing, numbering, formatting, typesetting, and internal and external hyperlinks.