Rolling mill for long articles

A continuous rolling mill for rolling an article defining a rolling axis X, comprising at least two rolling stations arranged in series along the rolling axis X, wherein at least one rolling station includes:

• a fixed structure;
• a roll-holder cartridge connected removably to the fixed structure and comprising three rolling rolls mounted on the roll-holder cartridge so as to be movable radially with respect to the rolling axis X, the three rolls being rotatable about three respective axes arranged at 120° from each other;
• three actuators mounted on the fixed structure and comprising pistons movable along three respective radial axes arranged at 120° from each other, each of said actuators being able, during use, to act on one of said rolls so as to impart a radial force suitable for the rolling of the article;
• wherein the three actuators are of the single-stroke type and are arranged so that, when the pistons of two actuators are completely retracted to the end-of-travel stop of the working stroke, a path P is created free from obstacles and parallel to the axis of the third actuator, said path P allowing the roll-holder cartridge to pass out laterally on the opposite side to that where the third actuator is situated.