Gears

The gear is one of the most common forms of mechanical transmission. Because of its smooth transmission and large transmission load, it is one of the transmission methods preferred by many engineers, although they may not know how to design gears from scratch, as most of them imitate existing gears and change the corresponding parameters. In this situation, either the strength is often insufficient, or it is over-designed, resulting in waste. This chapter provides gear design examples and shares the gear design process for spur, helical, bevel, and worm gear design, with the goal of providing greater understanding of gears. Examples and solved/unsolved problems for computational design of gears are provided. This chapter can be used as teaching material for courses in machine design for mechanical, industrial, and materials engineering majors in colleges and universities, and can also be used as a reference for scientific and technical personnel engaged in scientific and engineering calculations.