1. The transmission power and speed range of the gear is very large, the power can be from a very small to hundreds of thousands of kilowatts, and the peripheral speed can be from a very small to more than one hundred meters per second. The gear size can range from less than 1mm to more than 10m.

2. Gear transmission belongs to meshing transmission, the gear tooth profile is a specific curve, the instantaneous transmission ratio is constant, and the transmission is stable and reliable.

3. The gear transmission has high efficiency and long service life.

4. There are many kinds of gears, which can meet the needs of various transmission forms.

5. The manufacturing and installation of gears require high precision.