Speed Reducers are mechanical devices that use gears to reduce the output rotational speed compared to the input speed and, at the same time, increase the torque delivered.
In the hydraulic field, they are used to connect hydraulic motors (e.g., orbital motors) to machinery that requires a reduced final rotational speed but high torque, as typically occurs on earthmoving machines, drilling rigs, or cart drives.
The reduction in rpm and the multiplication of torque allow the system to perform heavy-duty work with precision and power.