Abstract: Apparatus for the working of an elongated body, in particular a profile of a fan blade, comprising the following parts, linked to each other:(a) a feeding device of a rod of an extruded material, from which the elongated body is obtained;(b) a first blocking device of the rod;(c) a second blocking device of the elongated body;(d) a mobile trolley able to slide along sliding trails;(e) a first cutting device integral with the mobile trolley;(f) at least one drilling device;(g) a second cutting device to cut the elongated body from the rod;(h) and a shaping device integral with the mobile trolley.

Abstract: A hollow extruded axial flow fan blade which includes two internal longitudinal reinforcing elements (ribs) perpendicular to the blade profile and in which are inserted through bolts for fastening the blade to a round supporting bar inserted longitudinally in the blade. The fastening bolts are completely internal to said blade being parallel to the plane of revolution of the blade while passing diametrally and perpendicularly through the round supporting bar.