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Gears. Wheels with teeth. What would the world be like if we didn't these efficient transmitters and modifiers of power? From pocket watches to reduction drives in aircraft carriers, you'll encounter gears almost everywhere.

Here you get a gem of a book that is halfway between dumb how-to and the theoretical. In other words, you'll learn what it is you need to know and, most importantly, why.

Chapters include tooth parts, spur gear calculations, speeds and powers, gear proportions and details of design, bevel gears, worm, helical and herringbone, spiral, skew bevel intermittent, elliptical, epicyclic, friction, special bevel gears, Williams system of internal gearing, and rolled gearing.

Even if you never use it, you oughta know about the Hindley worm gear and from its form the globoid gear, especially if you intend to build an elevator. They go into making the worm. They'll even tell you about making the hob for cutting a Hindley worm-wheel.

How would you use a hob to cut herringbone gears? What kind of set up would you use to cut elliptical gears? How would you even know how big to make a gear? What should the angles be? It's here. A pocket calculator and simple-to-use formulas will go a long way in answering some of your basic design questions. These are larger industrial gears for power transmission, not so much for motion picture cameras or clocks.

This third edition appeared in 1922 and is a revision, condensation, and clarification of many articles on gear cutting that appeared in American Machinist Magazine in the early years of the 20th century.

This is an excellent gear book - a Goldilocks book - not too simple but not too complex. A machine builder and/or machinist oughta have a copy in his reference library.

Code No. 014082