Bevel gears are also known as bevel gears, bevel gears. Used for transmission between intersecting shafts. Compared with column gears, it is possible to change the direction of transmission. Single-stage ratios can be up to 6 and up to 8.

Gear reducer is an independent closed transmission device between the prime mover and the working machine, used to reduce the speed and increase the torque to meet the needs of the work, in some occasions also used to increase the speed, known as speed booster.