Book excerpt: This classic reference is a compilation of a series of gear-designing charts illustrating by simple diagrams and examples the solutions of practical problems relating to spur gears, straight-tooth bevel gears, spiral-bevel gears, helical gears for parallel shaft drives, helical (spiral) gears for angular drives, herringbone gears, and worm gears. Features Contains a series of simply diagrammed gear-designing charts, illustrating solutions to practical problems. Presents all of the rules, formulas, and examples applying to all types of gears. Aids design engineers and manufacturers involved in the production of gears.