The stability and corrosion resistance of plastic gears have been recognized by people, which are very important in food processing, medical equipment and chemical processing industries and consumer applications. But plastic gears provide many other benefits, and advances in materials and manufacturing processes are closing the performance gap between plastic and metal in gear applications.

Many gears can be processed using plastic as raw materials, including: spur gears, bevel gears and worm gears

The most critical factor in determining whether a plastic gear is suitable for a specific purpose is the environment. The dimensional stability of plastics is not as good as that of metals. Their strength and hardness are largely dependent on temperature, and may change due to exposure to water or chemicals (moisture causes many plastic materials to expand, while chemical contact may cause them to shrink or shrink. Expansion depends on chemicals and plastics.