How does the drives work for rotation?

The drives for rotation are required for controlling rotation of a machine or fixture. Within these devices, reducers and gearmotors are key to vary the direction of rotation. These systems are used for example in mini-excavators, wheeled excavators and caterpillars, cranes, lifting platforms and winches.

Function of the gearboxes in the drives for rotation

One of the functions of a reducer is to change the direction of rotation. Some speed reducers can change the direction of rotation of the input arrow in relation to the output arrow.

In a speed reducer that contains gears with even numbers, the speed reducer can change the direction of rotation. If the input arrow is rotating clockwise, for example, the output arrow will rotate in the opposite direction. But, if the input arrow rotates counter-clockwise, then the output arrow will rotate clockwise.

This works differently if the speed reducer has odd numbers on its gear trains. In this case the input and output of the reducer arrow will rotate in the same direction. If the input arrow rotates in a clockwise direction, the output arrow will rotate in that direction.

Applications of drives for rotation

In the field of Industry, Construction and agriculture, heavy machinery needs such drives . In general, gearboxes and gearmotors for rotation are used successfully in the following cases :


The reducers for rotation of mini-excavators are perfect for machines with a weight of more than 6 tons. These are driven by axial piston hydraulic motors. The advantage of this type of reducers, is that they can be installed in small spaces, thus guaranteeing excellent functionality and performance.

Wheeled or crawler excavators

There are gearmotors for rotation and excavators of up to 20 tons (on wheels) or 80 tons (on tracks). In this case, the reducers, which are driven by axial piston hydraulic motors, can be installed in small places. Depending on the application, they can offer between 2,500Nm and 11,000Nm of torque.

Cranes and lifts

In this case you can count on reducers that guarantee greater versatility as well as greater usability for rotating platforms on lifts from 3 to 24 tons. These reducers are ideal for rotating the boom. Reductors for mobile cranes from 20 to 100 tons can offer up to 10,000 Nm of torque. In the case of reduction writing, offer up to 1:90.

Concrete pumps

The pumps of concrete of any size, need drives for rotation of high resistance, since the application requests robustness and control of rotation in any condition. The reducers of the 700T series for example, guarantee an effective solution in any situation for this type of application.