Kneading tool

A kneading tool prearranged for being mounted in a rotatable way about an axis of rotation of a kneading machine, said tool including:

• a central shaft defining a main axis;
• an end portion at an upper end of the central shaft adapted for connecting the kneading tool to the kneading machine;
• a scraper member at a lower end of the central shaft opposite the upper end;
• and
• a plurality of pairs of arms transverse to said central shaft, which are positioned in different orientations about the central shaft and in different positions along the main axis so as to be staggered and not overlying with respect to one another, wherein the plurality of pairs of arms consists of all arms extending from the central shaft of the tool between and not including the end portion and the scraper member,
• wherein each arm of each of the plurality of pairs of arms defines a first surface and a second surface opposite to one another, each inclined with respect to a plane orthogonal to the main axis by an inclination angle y other than 0° and 90°, the inclination angle y relative to the plane orthogonal to the main axis being the same for all of the first and second surfaces, wherein the first surfaces face an upper end of the tool and the second surfaces face an opposite bottom end of the tool, and
• wherein given a same direction of rotation of the central shaft about said main axis, a direction of inclination is kept constant between said first surfaces and is kept constant between said second surfaces, respectively, in such a way that rotation of said tool in a first direction of rotation exerts an action of thrust on dough by one of said first and second surfaces in a first direction toward the upper end and not in a second opposite direction toward the bottom end, and rotation of said tool in a second opposite direction of rotation exerts an action of thrust on the dough by the other of said first and second surfaces in the second opposite direction and not in the first direction, wherein the direction of inclination is different between the first surfaces and the second surfaces.