Baruffaldi has designed a wide range of two speed planetary gearboxes, in order to meet increasing demands coming from the market. Two speed gearboxes are commonly used on machine tools main spindles together with variable speed motors, aiming to extend constant power field offered by the motor and to increase torque at low speeds. By using Baruffaldi two speed gearboxes, production flexibility of the machine is increased without affecting precision: high torque is available for hard materials machining and high speed for soft materials.