Conical gears, also known as bevel gears or helical gears, are used for power transmission between intersecting shafts. Compared to cylindrical gears, they can change the transmission direction. The single-stage transmission ratio can reach up to 6, even up to 8.

1. Straight and helical bevel gear designs, manufacturing, and installation are relatively simple, but they generate more noise, suitable for low-speed transmission (<5 m/s); the power transmission of straight bevel gears can reach 370 kW, with a peripheral speed of 5 meters per second. Helical bevel gear drives operate smoothly, have higher gear load capacity, but are more difficult to manufacture and are less commonly used.

2. The helical bevel gears feature smooth transmission, low noise, and high load-bearing capacity, suitable for high-speed and heavy-load applications. The operation of helical bevel gear transmission is stable, capable of transmitting power up to 3700 kW and a peripheral speed of over 40 m/s.