The
machining center includes two independent carriages (14', 14"), which are slidably supported along respective longitudinal translation axes (X', X") by a pair of parallel horizontal rails (16a, 16b) extending along the longitudinal direction and fixed at an elevated position to a support structure (12). Each of the carriages (14', 14") supports a
machining head (22', 22") movable along a lateral translation axis (Y', Y") and a
vertical translation axis (Z', Z") by guide means (18', 18", 20', 20", 24', 24"). Each of the
machining heads (22', 22") supports a tool-holding spindle (28', 28") rotatably about a horizontal rotation axis (Yr', Yr") by rotation support means (26', 26"). A work-holding table (34) is supported at a base (30', 30") of the support structure (12) and is rotatable about a first rotation axis (Xr) extending in the horizontal, longitudinal direction. Two mechanized tool magazines (36', 36") are located at opposite longitudinal ends of the support structure (12) and are accessible by the spindles (28', 28").