Steel: Steel gears have excellent strength and wear resistance and are suitable for applications with high loads, high speeds and harsh environments, such as automotive drivetrains and mechanical transmissions. Aluminum alloy: Aluminum alloy gears have lighter weight and good corrosion resistance and are suitable for applications with light loads, high speeds and chemically corrosive environments, such as aerospace and electronic equipment. Brass: Brass gears have good wear and corrosion resistance and are suitable for applications with low speed, high torque and lubricated conditions, such as clock and marine transmission systems.

Nylon: Nylon gears have good wear resistance, self-lubrication and impact resistance, and are suitable for applications in low noise, low friction and high humidity environments, such as home appliances and automotive parts. Polytetrafluoroethylene (PTFE): PTFE gears have excellent chemical resistance and low friction coefficient, making them suitable for applications in high temperature, high precision and chemically corrosive environments, such as food processing and chemical equipment.

Carbon fiber reinforced composites: Carbon fiber composite gears have excellent strength-to-weight ratio and stiffness, making them suitable for high-performance, high-temperature and high-speed applications such as racing and aerospace.